Masoud Zabeti - Academia.edu (original) (raw)
Papers by Masoud Zabeti
Carbon, Apr 1, 2013
A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions... more A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions similar to those of a sea anemone was formed during pyrolysis of lignocellulose in the presence of water and sodium. We call the material ''carbon nanoanemones'' (CNAs). Well known carbon nano filamentous materials such as carbon nanotubes find extensive applications in electronics, hydrophobic coatings, catalysis and sensor technology. However, they are inert, non-polar, hydrophobic and surface chemical modification is often necessary before use. CNAs, on the other hand, contain oxygen, are reactive, polar and may be suitable, without modification, for applications e.g., catalysis, sensors.
Chemcatchem, Sep 11, 2015
Bioresource Technology, Aug 1, 2013
h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Ca... more h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Catalytic bio-oil resembles fuel oil in its properties. The active specie is proposed to be Na + ions hydrated by the OH groups of Al 2 O 3 .
Bioresource Technology, Aug 1, 2012
h i g h l i g h t s " Alkali-modified amorphous silical alumina (ASA) catalysts are effective for... more h i g h l i g h t s " Alkali-modified amorphous silical alumina (ASA) catalysts are effective for bio-oil upgrading. " Among the alkalis tested, Cs/ASA catalyst is promising " for: Cracking of lignin fraction of biomass. " Deoxygenating of substituted phenols. " Producing hydrocarbons.
Catalysis Today, Jul 1, 2016
Lignocellulos biomass can be converted to bio-oil containing aliphatic hydrocarbons via catalytic... more Lignocellulos biomass can be converted to bio-oil containing aliphatic hydrocarbons via catalytic pyrolysis at 500 • C in the presence of Cs modified amorphous silica alumina (Cs/ASA). The reaction routes for the formation of aliphatic hydrocarbons was studied using biomass constituent, viz. cellulose, hemicellulose, lignin, and single model components in a pyrolyzer system in conjunction with GC/MS. The pyrolysis behaviour of each biomass constituent was also studied using TGA. The results showed that in the presence of Cs/ASA catalyst aliphatic hydrocarbons can be formed from all the three constituents but mainly from lignin (35% of total peak area compared to 10% for cellulose) resulting in high quality bio-oil with 40 Mj kg −1 heating value. On the other hand, the pyrolysis of single model compounds did not result in the aliphatic hydrocarbons. However, pyrolysis of mixture of the model compounds yielded in aliphatic hydrocarbons indicating effect of intermolecular interactions such as hydrogen transfer over Cs + ions.
Biomass & Bioenergy, 2013
ABSTRACT Bio-oil produced via fast pyrolysis of biomass has the potential to be processed in a FC... more ABSTRACT Bio-oil produced via fast pyrolysis of biomass has the potential to be processed in a FCC (fluid catalytic cracking) unit to generate liquid fuel. However, this oil requires a significant upgrade to become an acceptable feedstock for refinery plants due to its high oxygen content. One promising route to improve the quality of bio-oil is to pyrolyse the parent biomass in the presence of a catalyst. This work investigates the influence of faujasite catalysts on the pyrolysis of pinewood. Pyrolysis process with Na-faujasite, Na0.2H0.8-faujasite, and H-faujasite (Na-FAU, Na0.2H0.8-FAU, and H-FAU) were carried out in a fixed-bed reactor at 500 °C. It is shown that, in the same condition, catalytic upgrading of pyrolysis vapour is superior to in-situ catalytic pyrolysis of biomass when it comes to quality of bio-oil. The yields of coke, gas and water increase while that of organic phase decreases proportional with the concentration of protons in catalysts. Compared to the other two catalysts, Na0.2H0.8-FAU removes the most oxygen from bio-oil, reduces amount of acids and aldehydes/ketones which result in a higher energy-contained and more stable oil with less corrosive property. However, the biggest contribution to the oxygen removal is via the formation of reaction water, which is not an optimum path. This leaves space for future development.
BACKGROUND STRUCTURE OF LIGNOCEL M
In recent years and especially since the COP - 21 climate agreement reached in Paris last year, e... more In recent years and especially since the COP - 21 climate agreement reached in Paris last year, efforts to mitigate climate change accelerate. All sectors need to contribute in order to achieve the well below 2 degree climate target. The agricultural sector is relevant for climate change in various ways. Like the agricultural sector, the transport sector is also responsible for significant greenhouse gas emissions. Advanced biofuels and biogas produced from wastes and residues can play an increasingly important role in the transport mix. In Italy, 600 Italian farmers are organised in the Italian Biogas Council (Consorzio Italiano Biogas e Gassificazione, CIB). Some years ago, CIB members developed a concept that they coined Biogasdoneright. In collaboration with various research institutes they seeked for a way to combine biogas feedstock production with crop production for food and feed as a way to generate additional income in a sustainable manner. The core of the Biogasdoneright ...
Processes, 2020
Meeting the transport needs of a growing world population makes it imperative to develop renewabl... more Meeting the transport needs of a growing world population makes it imperative to develop renewable and sustainable routes to production of liquid fuels. With a market-driven economic structure and pressing environmental issues, it is essential that these new routes provide environmental benefits while being economically viable. Conversion of second-generation lignocellulosic biomass resources to fuels via pyrolysis represents an important technological route. In this article, we report comparative assessment of the economic and lifecycle environmental aspects for catalytic and thermal pyrolysis. The goal of this assessment is two-fold: one is to understand the potential of this conversion route via the catalytic and thermal processes and second is to provide feedback for further development of catalysts for various stages of this conversion. The complete assessment is interdisciplinary in nature and connects the laboratory experiments with contextual sustainability assessment. Three...
Processes, 2020
Availability of sustainable transportation fuels in future hinges on the use of lignocellulosic r... more Availability of sustainable transportation fuels in future hinges on the use of lignocellulosic resources for production of biofuels. The process of biomass pyrolysis can be used to convert solid biomass resources into liquid fuels. In this study, laboratory experiments and process simulations were combined to gain insight into the technical performance of catalytic and thermal pyrolysis processes. Waste pinewood was used as a feedstock for the processes. The pyrolysis took place at 500 °C and employs three different catalysts, in the case of the catalytic processes. A process model was developed with Aspen Plus and a wide range of representative components of bio-oil were used to model the properties of the bio-oil blend. The results of the process model calculations show that catalytic pyrolysis process produces bio-oil of superior quality. Different technical process scenarios were explored based on the properties of the bio-oil after separation of water-soluble components, with ...
Bioresource Technology, 2013
h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Ca... more h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Catalytic bio-oil resembles fuel oil in its properties. The active specie is proposed to be Na + ions hydrated by the OH groups of Al 2 O 3 .
Carbon, 2013
A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions... more A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions similar to those of a sea anemone was formed during pyrolysis of lignocellulose in the presence of water and sodium. We call the material ''carbon nanoanemones'' (CNAs). Well known carbon nano filamentous materials such as carbon nanotubes find extensive applications in electronics, hydrophobic coatings, catalysis and sensor technology. However, they are inert, non-polar, hydrophobic and surface chemical modification is often necessary before use. CNAs, on the other hand, contain oxygen, are reactive, polar and may be suitable, without modification, for applications e.g., catalysis, sensors.
Carbon, Apr 1, 2013
A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions... more A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions similar to those of a sea anemone was formed during pyrolysis of lignocellulose in the presence of water and sodium. We call the material ''carbon nanoanemones'' (CNAs). Well known carbon nano filamentous materials such as carbon nanotubes find extensive applications in electronics, hydrophobic coatings, catalysis and sensor technology. However, they are inert, non-polar, hydrophobic and surface chemical modification is often necessary before use. CNAs, on the other hand, contain oxygen, are reactive, polar and may be suitable, without modification, for applications e.g., catalysis, sensors.
Chemcatchem, Sep 11, 2015
Bioresource Technology, Aug 1, 2013
h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Ca... more h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Catalytic bio-oil resembles fuel oil in its properties. The active specie is proposed to be Na + ions hydrated by the OH groups of Al 2 O 3 .
Bioresource Technology, Aug 1, 2012
h i g h l i g h t s " Alkali-modified amorphous silical alumina (ASA) catalysts are effective for... more h i g h l i g h t s " Alkali-modified amorphous silical alumina (ASA) catalysts are effective for bio-oil upgrading. " Among the alkalis tested, Cs/ASA catalyst is promising " for: Cracking of lignin fraction of biomass. " Deoxygenating of substituted phenols. " Producing hydrocarbons.
Catalysis Today, Jul 1, 2016
Lignocellulos biomass can be converted to bio-oil containing aliphatic hydrocarbons via catalytic... more Lignocellulos biomass can be converted to bio-oil containing aliphatic hydrocarbons via catalytic pyrolysis at 500 • C in the presence of Cs modified amorphous silica alumina (Cs/ASA). The reaction routes for the formation of aliphatic hydrocarbons was studied using biomass constituent, viz. cellulose, hemicellulose, lignin, and single model components in a pyrolyzer system in conjunction with GC/MS. The pyrolysis behaviour of each biomass constituent was also studied using TGA. The results showed that in the presence of Cs/ASA catalyst aliphatic hydrocarbons can be formed from all the three constituents but mainly from lignin (35% of total peak area compared to 10% for cellulose) resulting in high quality bio-oil with 40 Mj kg −1 heating value. On the other hand, the pyrolysis of single model compounds did not result in the aliphatic hydrocarbons. However, pyrolysis of mixture of the model compounds yielded in aliphatic hydrocarbons indicating effect of intermolecular interactions such as hydrogen transfer over Cs + ions.
Biomass & Bioenergy, 2013
ABSTRACT Bio-oil produced via fast pyrolysis of biomass has the potential to be processed in a FC... more ABSTRACT Bio-oil produced via fast pyrolysis of biomass has the potential to be processed in a FCC (fluid catalytic cracking) unit to generate liquid fuel. However, this oil requires a significant upgrade to become an acceptable feedstock for refinery plants due to its high oxygen content. One promising route to improve the quality of bio-oil is to pyrolyse the parent biomass in the presence of a catalyst. This work investigates the influence of faujasite catalysts on the pyrolysis of pinewood. Pyrolysis process with Na-faujasite, Na0.2H0.8-faujasite, and H-faujasite (Na-FAU, Na0.2H0.8-FAU, and H-FAU) were carried out in a fixed-bed reactor at 500 °C. It is shown that, in the same condition, catalytic upgrading of pyrolysis vapour is superior to in-situ catalytic pyrolysis of biomass when it comes to quality of bio-oil. The yields of coke, gas and water increase while that of organic phase decreases proportional with the concentration of protons in catalysts. Compared to the other two catalysts, Na0.2H0.8-FAU removes the most oxygen from bio-oil, reduces amount of acids and aldehydes/ketones which result in a higher energy-contained and more stable oil with less corrosive property. However, the biggest contribution to the oxygen removal is via the formation of reaction water, which is not an optimum path. This leaves space for future development.
BACKGROUND STRUCTURE OF LIGNOCEL M
In recent years and especially since the COP - 21 climate agreement reached in Paris last year, e... more In recent years and especially since the COP - 21 climate agreement reached in Paris last year, efforts to mitigate climate change accelerate. All sectors need to contribute in order to achieve the well below 2 degree climate target. The agricultural sector is relevant for climate change in various ways. Like the agricultural sector, the transport sector is also responsible for significant greenhouse gas emissions. Advanced biofuels and biogas produced from wastes and residues can play an increasingly important role in the transport mix. In Italy, 600 Italian farmers are organised in the Italian Biogas Council (Consorzio Italiano Biogas e Gassificazione, CIB). Some years ago, CIB members developed a concept that they coined Biogasdoneright. In collaboration with various research institutes they seeked for a way to combine biogas feedstock production with crop production for food and feed as a way to generate additional income in a sustainable manner. The core of the Biogasdoneright ...
Processes, 2020
Meeting the transport needs of a growing world population makes it imperative to develop renewabl... more Meeting the transport needs of a growing world population makes it imperative to develop renewable and sustainable routes to production of liquid fuels. With a market-driven economic structure and pressing environmental issues, it is essential that these new routes provide environmental benefits while being economically viable. Conversion of second-generation lignocellulosic biomass resources to fuels via pyrolysis represents an important technological route. In this article, we report comparative assessment of the economic and lifecycle environmental aspects for catalytic and thermal pyrolysis. The goal of this assessment is two-fold: one is to understand the potential of this conversion route via the catalytic and thermal processes and second is to provide feedback for further development of catalysts for various stages of this conversion. The complete assessment is interdisciplinary in nature and connects the laboratory experiments with contextual sustainability assessment. Three...
Processes, 2020
Availability of sustainable transportation fuels in future hinges on the use of lignocellulosic r... more Availability of sustainable transportation fuels in future hinges on the use of lignocellulosic resources for production of biofuels. The process of biomass pyrolysis can be used to convert solid biomass resources into liquid fuels. In this study, laboratory experiments and process simulations were combined to gain insight into the technical performance of catalytic and thermal pyrolysis processes. Waste pinewood was used as a feedstock for the processes. The pyrolysis took place at 500 °C and employs three different catalysts, in the case of the catalytic processes. A process model was developed with Aspen Plus and a wide range of representative components of bio-oil were used to model the properties of the bio-oil blend. The results of the process model calculations show that catalytic pyrolysis process produces bio-oil of superior quality. Different technical process scenarios were explored based on the properties of the bio-oil after separation of water-soluble components, with ...
Bioresource Technology, 2013
h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Ca... more h i g h l i g h t s Biomass pyrolysis vapors was upgraded over Na 2 CO 3 /c-Al 2 O 3 catalyst. Catalytic bio-oil resembles fuel oil in its properties. The active specie is proposed to be Na + ions hydrated by the OH groups of Al 2 O 3 .
Carbon, 2013
A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions... more A filamentous carbon nanomaterial having morphology, elemental compositions and growth conditions similar to those of a sea anemone was formed during pyrolysis of lignocellulose in the presence of water and sodium. We call the material ''carbon nanoanemones'' (CNAs). Well known carbon nano filamentous materials such as carbon nanotubes find extensive applications in electronics, hydrophobic coatings, catalysis and sensor technology. However, they are inert, non-polar, hydrophobic and surface chemical modification is often necessary before use. CNAs, on the other hand, contain oxygen, are reactive, polar and may be suitable, without modification, for applications e.g., catalysis, sensors.