Paolo Mocellin - Academia.edu (original) (raw)

Papers by Paolo Mocellin

Research paper thumbnail of Modeling-based design specifications for microfluidic gradients generators for biomedical applications

Biochemical Engineering Journal, 2022

Research paper thumbnail of Accidental release in the bunkering of LNG: Phenomenological aspects and safety zone

Research paper thumbnail of Decarbonizing Methanol Production Via an Electrified Steam or Dry Methane Reformer

SSRN Electronic Journal, 2021

Research paper thumbnail of Risk assessment in a hypothetical network pipeline in UK transporting carbon dioxide

Journal of Loss Prevention in the Process Industries, 2016

With the advent of Carbon Capture and Storage technology (CCS) the scale and extent of its handli... more With the advent of Carbon Capture and Storage technology (CCS) the scale and extent of its handling is set to increase. Carbon dioxide (CO2) capture plants are expected to be situated near to power plants and other large industrial sources. Afterward CO2 is to be transported to storage site using one or a combination of transport media: truck, train, ship or pipeline. Transport by pipeline is considered the preferred option for large quantities of CO2 over long distances. The hazard connected with this kind of transportation can be considered an emerging risk and is the subject of this paper. The paper describes the Quantitative Risk Assessment of a hypothetical network pipeline located in UK, in particular the study of consequences due to a CO2 release from pipeline. The risk analysis highlighted that some sections of pipeline network cross densely populated areas. For this reason, some changes in the original path of the network have been proposed in order to achieve a significant reduction in the societal risk.

Research paper thumbnail of Emissioni in atmosfera da impianti industriali. La domanda di autorizzazione, l'iter e l'analisi di alcuni casi pratici

Sunto ed excursus attraverso il D.Lgs.152/06 relativamente alla parte "emissioni in atmosfer... more Sunto ed excursus attraverso il D.Lgs.152/06 relativamente alla parte "emissioni in atmosfera da impianti industriali". Analisi delle diverse tipologie di autorizzazione alle emissioni, delle attivita in deroga, delle competenze e dello schema di una generica relazione tecnica alle emissioni. Completa la tesi la considerazione di due impianti presi da esempio nella regione Veneto: un'industria galvanica e una di torrefazione del caffe. L'analisi del processo e dell'impianto ha consentito di classificarle ai fini autorizzativi, di stimare emissioni e punti di emissione e di condurre delle analisi in situ per la determinazione delle specie inquinanti sospettate. Concludono la tesi considerazioni sui campionamenti, sulle definizioni dei fattori di emissione e alcuni schemi riassuntivi

Research paper thumbnail of Modellazione del rilascio e della ricaduta al suolo di CO2 da pipeline per Carbon Capture and Storage

Questo lavoro intende analizzare e modellare un rilascio accidentale di anidride carbonica pressu... more Questo lavoro intende analizzare e modellare un rilascio accidentale di anidride carbonica pressurizzata derivante da rottura di pipelines per tecnologia CCS. I modelli implementati consentono innanzitutto la stima del diametro medio di Sauter delle particelle di ghiaccio secco che potrebbero formarsi e poi lo studio della termo-fluido dinamica nella ricaduta al suolo. E' completato da alcune considerazioni derivanti da simulazioni al CFD

Research paper thumbnail of Carbon Capture and Storage Hazard Investigation: Numerical Analysis of Hazards related to Dry Ice Bank Sublimation following Accidental Carbon Dioxide Releases

Chemical Engineering Transactions

Climate Change is caused by greenhouse gases such as CO2. Worldwide increase in energy demand cou... more Climate Change is caused by greenhouse gases such as CO2. Worldwide increase in energy demand coupled with a continued reliance on fossil fuels have contributed to a significant increase in atmospheric levels of CO2. Scenarios for stabilizing the emissions of CO2 suggest mitigation actions including the deployment of Carbon Capture and Storage projects (CCS). One of the process steps consists in the transportation of the CO2 to a storage location by buried pipelines. Any accidental release determined by failures is followed by a pressurized release of CO2 with dry ice formation. Under specific conditions a dry ice bank will form contributing to atmospheric dispersion through superficial sublimation (Vianello et al., 2014). This study focuses on the importance of the bank sublimation emission to the near field dispersion of CO2. The application of CFD techniques show that hazardous conditions exist over an area close to the source. Within 50 m from the pipeline the volumetric fractio...

Research paper thumbnail of Electrified methane reforming decarbonises methanol synthesis

Journal of CO2 Utilization, 2022

Research paper thumbnail of On the flash fire of stratified cloud of liquefied natural gas

Journal of Loss Prevention in the Process Industries

Research paper thumbnail of Hybrid risk-based LCA to improve the Acid Gas to Syngas (AG2S™) process

Journal of Loss Prevention in the Process Industries

Research paper thumbnail of Addressing waste disposal fires in open fields through large eddy simulations

Addressing fires in waste disposal facilities is of topical interest for firefighting and environ... more Addressing fires in waste disposal facilities is of topical interest for firefighting and environmental protection. Statistics of fires that involve fuel matrixes made of diversified wastes are escalating and ask for an effective response, both in prevention and mitigation. Crucial to this target is the consideration of underlying phenomena, and modeling of fire dynamics and pollutant emission also via robust numerical simulations. In this work, fires in waste disposal facilities are addressed with Large Eddy Simulation to test the capability to catch the main phenomena of the combustion of wastes made of plastic and the consequent emission of pollutants. This approach is applied to fuel matrixes in form of piles of different sizes, made of polyolefins and polyvinylchloride burned in an open field. The atmospheric dispersion of pollutants, including soot, carbon monoxide, carbon dioxide, and hydrogen chloride are investigated under different environmental conditions. Besides, therma...

Research paper thumbnail of Natech Scenarios in the Process Industries and Reliability Analysis: An Inclusive Approach to the Seismic Effect

Research paper thumbnail of Structural Behaviour of Multi-storey Buildings Subjected to Internal Explosions

Chemical engineering transactions, 2016

Structural Behaviour of Multi-Storey Buildings Subjected to Internal Explosion Michael Andreotti,... more Structural Behaviour of Multi-Storey Buildings Subjected to Internal Explosion Michael Andreotti, Paolo Mocellin, Mariano Angelo Zanini, Chiara Vianello, Carlo Pellegrino, Claudio Modena, Giuseppe Maschio Department of Civil, Envirnmental and Architectural Engineering, University of Padua, Via Marzolo 9, Padova (Italy) Department of Industrial Engineering, University of Padua, Via Marzolo 9, Padova (Italy) michael.andreotti@studenti.unipd.it

Research paper thumbnail of Study of Formation, Sublimation and Deposition of Dry Ice from Carbon Capture and Storage Pipelines

Chemical engineering transactions, 2014

Climate Change is caused by greenhouse gases such as CO2. Worldwide increases in energy demand co... more Climate Change is caused by greenhouse gases such as CO2. Worldwide increases in energy demand coupled with a continued reliance on flues derived from fossil resources have contributed to a significant and severe increase in atmospheric levels of CO2. Scenarios for stabilizing the emissions of CO2 suggest its stabilization through a portfolio of mitigation actions including the deployment of Carbon Capture and Storage projects (CCS). One of the process step consists in the transportation of the CO2 to a storage location and this work focuses on dry ice formation following the accidental release of pressurized CO2 from CCS pipelines. The main aim is to investigate the dynamic and thermal fluid dynamic behaviour of a dry ice particle travelling down to the ground through air after the expansion to atmospheric conditions. This is achieved analyzing the influence of all the variables involved in the phenomenon, that is to say: particle initial diameter, post – expansion velocity and tem...

Research paper thumbnail of Waste Disposal Facilities Fires: Prevention and Management. The Veneto Region Experience

Research paper thumbnail of CCS and EOR hazard analysis. Experimental investigation and modeling of multiphase CO2 pressurized releases

CO2 handling operations are gaining importance in the worldwide discussion mainly because of the ... more CO2 handling operations are gaining importance in the worldwide discussion mainly because of the large strategies that are currently being developed to govern the Global Warming. In this sense, the CO2 is considered one of the most important GHG (Greenhouse Gas) since it is also actually emitted in large quantities from anthropogenic sources. These emissions arise mainly from combustion of fossil fuels and biomass in power generation, gasification, industrial processes, natural gas processing, petroleum refining, building and transport sectors. The deployment of the Carbon Capture and Storage (CCS) technique is currently under analysis as a mean of limiting these emissions and so the atmospheric concentration of the CO2. The CCS chain is subdivided into three main systems: the system of capture and compression, the transport system and the storage system. This technology therefore involves the handling of the CO2 to store it in a reservoir, instead of allowing its release to the atm...

Research paper thumbnail of Facing Emerging Risks in Carbon Sequestration Networks . A Comprehensive Source Modelling Approach

Tackling risks in emerging infrastructures is a key point in making them acceptable and safer. Ca... more Tackling risks in emerging infrastructures is a key point in making them acceptable and safer. Carbon Sequestration pipeline networks, as part of the Carbon Capture and Storage chains, are linked to the handling of large amounts of CO2 and may be subjected to failures and ruptures. This results in large pressurized and multiphase releases of CO2 that behaves as a denser-than-air and asphyxiant gas. The lack of a comprehensive modelling approach in this sense makes employed risk safety procedures often unreliable and lacking. In this work, a comprehensive modelling approach, based on self-collected experimental data, is proposed with the aim of filling existing gaps. Results well match experimental data and the modelling procedure allows for the estimation of characteristic parameters linked to heat transfer phenomena and the incidence of geometry and operative conditions on the release evolution. The occurrence of the solid phase and the applicability of the isothermal hypothesis is...

Research paper thumbnail of A Review of the Basic Safety Requirements of Emerging Infrastructures for Green Transition

The transition to a Climate-Neutral economy requires a reduction of energy-related carbon dioxide... more The transition to a Climate-Neutral economy requires a reduction of energy-related carbon dioxide emissions and Carbon dioxide capture and geological storage (CCS) is a key technology that will contribute to mitigating climate change. Hazards and risks related to processing, transport, and storage of CO2 are not new aspects, but peculiarities of CO2 safety scenarios can lead to risk underestimation and misperception. Solid-phase occurrence and heavy gas dispersion, multiphase releases, leakages from wells and storage sites, and the integrity of equipment subjected to internal corrosion and cryogenic temperatures, are typical scenarios involved in CCS chains. These are often mentioned in technical standards and regulations and require proper advanced assessment. In this work, the main hazards and risk scenarios in CCS operations with a special focus on atypical instances that are peculiar to the case of CO2 will be reviewed. Open issues concerning the modeling of consequences and spe...

Research paper thumbnail of Hazard Analysis of Carbon Sequestration Pipelines. The Effect of Impurities and Insulation Specs on the Release Evolution

Many emerging risks are related to strategic infrastructures carrying CO2 for sequestration purpo... more Many emerging risks are related to strategic infrastructures carrying CO2 for sequestration purposes (CCS and EOR projects). Among these, a pressurized release induced by a rupture is by far the most common hazard scenario that may lead to serious consequences. A comprehensive source modelling approach should also include the description of effects related to impurities that are commonly included and accepted in captured CO2 streams. This work suggests a method to assess the influence of impurities with respect to a flow of pure CO2 and shows that an increasing impurities content alters both the phase change mechanisms and the temperature dynamics inside the pipeline. This effect is very sensitive to the pipeline length subjected to a release and the orifice size. A detailed analysis of the influence of insulation in the release dynamics shows instead a negligible contribution to the thermal dynamics mainly due to the irrelevant role played by conductive mechanisms with respect to c...

Research paper thumbnail of Numerical Modeling of Experimental Trials Involving Pressurized Release of Gaseous CO2

Chemical engineering transactions, 2016

Modeling pressurized releases in QRA procedures is a key step in obtaining a reliable description... more Modeling pressurized releases in QRA procedures is a key step in obtaining a reliable description and prediction of hazards. The application of these procedures to hazards related to CCS and EOR infrastructures poses many problems strictly related to the peculiar thermodynamic behaviour of the CO2 (Koorneef et al, 2009). Difficulties in the prediction of the discharge behaviour of the CO2 during rapid depressurizations can influence calculations concerning the atmospheric dispersion and the eventuality of a dry ice bank formation (Mocellin et al., 2015).In order to fill some gaps concerning especially compressible CO2 discharges, starting from self – collected laboratory scale experimental data, a semi – predictive model is proposed with the aim of describing a sudden release from a pressurized vessel.The model is based both on conservation equations as well as suitable correlations to give a description of heat – transfer mechanisms. In addition, the Peng – Robinson equation of sta...

Research paper thumbnail of Modeling-based design specifications for microfluidic gradients generators for biomedical applications

Biochemical Engineering Journal, 2022

Research paper thumbnail of Accidental release in the bunkering of LNG: Phenomenological aspects and safety zone

Research paper thumbnail of Decarbonizing Methanol Production Via an Electrified Steam or Dry Methane Reformer

SSRN Electronic Journal, 2021

Research paper thumbnail of Risk assessment in a hypothetical network pipeline in UK transporting carbon dioxide

Journal of Loss Prevention in the Process Industries, 2016

With the advent of Carbon Capture and Storage technology (CCS) the scale and extent of its handli... more With the advent of Carbon Capture and Storage technology (CCS) the scale and extent of its handling is set to increase. Carbon dioxide (CO2) capture plants are expected to be situated near to power plants and other large industrial sources. Afterward CO2 is to be transported to storage site using one or a combination of transport media: truck, train, ship or pipeline. Transport by pipeline is considered the preferred option for large quantities of CO2 over long distances. The hazard connected with this kind of transportation can be considered an emerging risk and is the subject of this paper. The paper describes the Quantitative Risk Assessment of a hypothetical network pipeline located in UK, in particular the study of consequences due to a CO2 release from pipeline. The risk analysis highlighted that some sections of pipeline network cross densely populated areas. For this reason, some changes in the original path of the network have been proposed in order to achieve a significant reduction in the societal risk.

Research paper thumbnail of Emissioni in atmosfera da impianti industriali. La domanda di autorizzazione, l'iter e l'analisi di alcuni casi pratici

Sunto ed excursus attraverso il D.Lgs.152/06 relativamente alla parte "emissioni in atmosfer... more Sunto ed excursus attraverso il D.Lgs.152/06 relativamente alla parte "emissioni in atmosfera da impianti industriali". Analisi delle diverse tipologie di autorizzazione alle emissioni, delle attivita in deroga, delle competenze e dello schema di una generica relazione tecnica alle emissioni. Completa la tesi la considerazione di due impianti presi da esempio nella regione Veneto: un'industria galvanica e una di torrefazione del caffe. L'analisi del processo e dell'impianto ha consentito di classificarle ai fini autorizzativi, di stimare emissioni e punti di emissione e di condurre delle analisi in situ per la determinazione delle specie inquinanti sospettate. Concludono la tesi considerazioni sui campionamenti, sulle definizioni dei fattori di emissione e alcuni schemi riassuntivi

Research paper thumbnail of Modellazione del rilascio e della ricaduta al suolo di CO2 da pipeline per Carbon Capture and Storage

Questo lavoro intende analizzare e modellare un rilascio accidentale di anidride carbonica pressu... more Questo lavoro intende analizzare e modellare un rilascio accidentale di anidride carbonica pressurizzata derivante da rottura di pipelines per tecnologia CCS. I modelli implementati consentono innanzitutto la stima del diametro medio di Sauter delle particelle di ghiaccio secco che potrebbero formarsi e poi lo studio della termo-fluido dinamica nella ricaduta al suolo. E' completato da alcune considerazioni derivanti da simulazioni al CFD

Research paper thumbnail of Carbon Capture and Storage Hazard Investigation: Numerical Analysis of Hazards related to Dry Ice Bank Sublimation following Accidental Carbon Dioxide Releases

Chemical Engineering Transactions

Climate Change is caused by greenhouse gases such as CO2. Worldwide increase in energy demand cou... more Climate Change is caused by greenhouse gases such as CO2. Worldwide increase in energy demand coupled with a continued reliance on fossil fuels have contributed to a significant increase in atmospheric levels of CO2. Scenarios for stabilizing the emissions of CO2 suggest mitigation actions including the deployment of Carbon Capture and Storage projects (CCS). One of the process steps consists in the transportation of the CO2 to a storage location by buried pipelines. Any accidental release determined by failures is followed by a pressurized release of CO2 with dry ice formation. Under specific conditions a dry ice bank will form contributing to atmospheric dispersion through superficial sublimation (Vianello et al., 2014). This study focuses on the importance of the bank sublimation emission to the near field dispersion of CO2. The application of CFD techniques show that hazardous conditions exist over an area close to the source. Within 50 m from the pipeline the volumetric fractio...

Research paper thumbnail of Electrified methane reforming decarbonises methanol synthesis

Journal of CO2 Utilization, 2022

Research paper thumbnail of On the flash fire of stratified cloud of liquefied natural gas

Journal of Loss Prevention in the Process Industries

Research paper thumbnail of Hybrid risk-based LCA to improve the Acid Gas to Syngas (AG2S™) process

Journal of Loss Prevention in the Process Industries

Research paper thumbnail of Addressing waste disposal fires in open fields through large eddy simulations

Addressing fires in waste disposal facilities is of topical interest for firefighting and environ... more Addressing fires in waste disposal facilities is of topical interest for firefighting and environmental protection. Statistics of fires that involve fuel matrixes made of diversified wastes are escalating and ask for an effective response, both in prevention and mitigation. Crucial to this target is the consideration of underlying phenomena, and modeling of fire dynamics and pollutant emission also via robust numerical simulations. In this work, fires in waste disposal facilities are addressed with Large Eddy Simulation to test the capability to catch the main phenomena of the combustion of wastes made of plastic and the consequent emission of pollutants. This approach is applied to fuel matrixes in form of piles of different sizes, made of polyolefins and polyvinylchloride burned in an open field. The atmospheric dispersion of pollutants, including soot, carbon monoxide, carbon dioxide, and hydrogen chloride are investigated under different environmental conditions. Besides, therma...

Research paper thumbnail of Natech Scenarios in the Process Industries and Reliability Analysis: An Inclusive Approach to the Seismic Effect

Research paper thumbnail of Structural Behaviour of Multi-storey Buildings Subjected to Internal Explosions

Chemical engineering transactions, 2016

Structural Behaviour of Multi-Storey Buildings Subjected to Internal Explosion Michael Andreotti,... more Structural Behaviour of Multi-Storey Buildings Subjected to Internal Explosion Michael Andreotti, Paolo Mocellin, Mariano Angelo Zanini, Chiara Vianello, Carlo Pellegrino, Claudio Modena, Giuseppe Maschio Department of Civil, Envirnmental and Architectural Engineering, University of Padua, Via Marzolo 9, Padova (Italy) Department of Industrial Engineering, University of Padua, Via Marzolo 9, Padova (Italy) michael.andreotti@studenti.unipd.it

Research paper thumbnail of Study of Formation, Sublimation and Deposition of Dry Ice from Carbon Capture and Storage Pipelines

Chemical engineering transactions, 2014

Climate Change is caused by greenhouse gases such as CO2. Worldwide increases in energy demand co... more Climate Change is caused by greenhouse gases such as CO2. Worldwide increases in energy demand coupled with a continued reliance on flues derived from fossil resources have contributed to a significant and severe increase in atmospheric levels of CO2. Scenarios for stabilizing the emissions of CO2 suggest its stabilization through a portfolio of mitigation actions including the deployment of Carbon Capture and Storage projects (CCS). One of the process step consists in the transportation of the CO2 to a storage location and this work focuses on dry ice formation following the accidental release of pressurized CO2 from CCS pipelines. The main aim is to investigate the dynamic and thermal fluid dynamic behaviour of a dry ice particle travelling down to the ground through air after the expansion to atmospheric conditions. This is achieved analyzing the influence of all the variables involved in the phenomenon, that is to say: particle initial diameter, post – expansion velocity and tem...

Research paper thumbnail of Waste Disposal Facilities Fires: Prevention and Management. The Veneto Region Experience

Research paper thumbnail of CCS and EOR hazard analysis. Experimental investigation and modeling of multiphase CO2 pressurized releases

CO2 handling operations are gaining importance in the worldwide discussion mainly because of the ... more CO2 handling operations are gaining importance in the worldwide discussion mainly because of the large strategies that are currently being developed to govern the Global Warming. In this sense, the CO2 is considered one of the most important GHG (Greenhouse Gas) since it is also actually emitted in large quantities from anthropogenic sources. These emissions arise mainly from combustion of fossil fuels and biomass in power generation, gasification, industrial processes, natural gas processing, petroleum refining, building and transport sectors. The deployment of the Carbon Capture and Storage (CCS) technique is currently under analysis as a mean of limiting these emissions and so the atmospheric concentration of the CO2. The CCS chain is subdivided into three main systems: the system of capture and compression, the transport system and the storage system. This technology therefore involves the handling of the CO2 to store it in a reservoir, instead of allowing its release to the atm...

Research paper thumbnail of Facing Emerging Risks in Carbon Sequestration Networks . A Comprehensive Source Modelling Approach

Tackling risks in emerging infrastructures is a key point in making them acceptable and safer. Ca... more Tackling risks in emerging infrastructures is a key point in making them acceptable and safer. Carbon Sequestration pipeline networks, as part of the Carbon Capture and Storage chains, are linked to the handling of large amounts of CO2 and may be subjected to failures and ruptures. This results in large pressurized and multiphase releases of CO2 that behaves as a denser-than-air and asphyxiant gas. The lack of a comprehensive modelling approach in this sense makes employed risk safety procedures often unreliable and lacking. In this work, a comprehensive modelling approach, based on self-collected experimental data, is proposed with the aim of filling existing gaps. Results well match experimental data and the modelling procedure allows for the estimation of characteristic parameters linked to heat transfer phenomena and the incidence of geometry and operative conditions on the release evolution. The occurrence of the solid phase and the applicability of the isothermal hypothesis is...

Research paper thumbnail of A Review of the Basic Safety Requirements of Emerging Infrastructures for Green Transition

The transition to a Climate-Neutral economy requires a reduction of energy-related carbon dioxide... more The transition to a Climate-Neutral economy requires a reduction of energy-related carbon dioxide emissions and Carbon dioxide capture and geological storage (CCS) is a key technology that will contribute to mitigating climate change. Hazards and risks related to processing, transport, and storage of CO2 are not new aspects, but peculiarities of CO2 safety scenarios can lead to risk underestimation and misperception. Solid-phase occurrence and heavy gas dispersion, multiphase releases, leakages from wells and storage sites, and the integrity of equipment subjected to internal corrosion and cryogenic temperatures, are typical scenarios involved in CCS chains. These are often mentioned in technical standards and regulations and require proper advanced assessment. In this work, the main hazards and risk scenarios in CCS operations with a special focus on atypical instances that are peculiar to the case of CO2 will be reviewed. Open issues concerning the modeling of consequences and spe...

Research paper thumbnail of Hazard Analysis of Carbon Sequestration Pipelines. The Effect of Impurities and Insulation Specs on the Release Evolution

Many emerging risks are related to strategic infrastructures carrying CO2 for sequestration purpo... more Many emerging risks are related to strategic infrastructures carrying CO2 for sequestration purposes (CCS and EOR projects). Among these, a pressurized release induced by a rupture is by far the most common hazard scenario that may lead to serious consequences. A comprehensive source modelling approach should also include the description of effects related to impurities that are commonly included and accepted in captured CO2 streams. This work suggests a method to assess the influence of impurities with respect to a flow of pure CO2 and shows that an increasing impurities content alters both the phase change mechanisms and the temperature dynamics inside the pipeline. This effect is very sensitive to the pipeline length subjected to a release and the orifice size. A detailed analysis of the influence of insulation in the release dynamics shows instead a negligible contribution to the thermal dynamics mainly due to the irrelevant role played by conductive mechanisms with respect to c...

Research paper thumbnail of Numerical Modeling of Experimental Trials Involving Pressurized Release of Gaseous CO2

Chemical engineering transactions, 2016

Modeling pressurized releases in QRA procedures is a key step in obtaining a reliable description... more Modeling pressurized releases in QRA procedures is a key step in obtaining a reliable description and prediction of hazards. The application of these procedures to hazards related to CCS and EOR infrastructures poses many problems strictly related to the peculiar thermodynamic behaviour of the CO2 (Koorneef et al, 2009). Difficulties in the prediction of the discharge behaviour of the CO2 during rapid depressurizations can influence calculations concerning the atmospheric dispersion and the eventuality of a dry ice bank formation (Mocellin et al., 2015).In order to fill some gaps concerning especially compressible CO2 discharges, starting from self – collected laboratory scale experimental data, a semi – predictive model is proposed with the aim of describing a sudden release from a pressurized vessel.The model is based both on conservation equations as well as suitable correlations to give a description of heat – transfer mechanisms. In addition, the Peng – Robinson equation of sta...