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Hermann Hofbauer

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Papers by Hermann Hofbauer

Research paper thumbnail of Experimental demonstration of 80 kWth chemical looping combustion of biogenic feedstock coupled with direct CO2 utilization by exhaust gas methanation

Biomass Conversion and Biorefinery, May 10, 2023

Research paper thumbnail of Fluid-Dynamic Investigations in a Cold Model for a Dual Fluidized Bed Biomass Steam Gasification Process: Optimization of the Cyclone

Research paper thumbnail of Experimental Demonstration and Validation of Hydrogen Production Based on Gasification of Lignocellulosic Feedstock

ChemEngineering, Dec 11, 2018

Research paper thumbnail of Co-Gasification of Biomass and Coal in an 8MW Dual Fluidized Bed Steam Gasifier

Research paper thumbnail of Behavior of GCMS tar components in a water gas shift unit operated with tar-rich product gas from an industrial scale dual fluidized bed biomass steam gasification plant

Biomass Conversion and Biorefinery, Apr 15, 2016

Research paper thumbnail of Chemical Looping Pilot Plant Results Using a Nickel-Based Oxygen Carrier

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, Mar 1, 2011

Research paper thumbnail of Steam gasification of various feedstocks at a dual fluidised bed gasifier: Impacts of operation conditions and bed materials

Biomass Conversion and Biorefinery, Feb 25, 2011

Research paper thumbnail of Experimental investigation of hydrogen-intensified synthetic natural gas production via biomass gasification: a technical comparison of different production pathways

Biomass Conversion and Biorefinery, May 26, 2023

Research paper thumbnail of Modelling and simulation of the biomass fired dual fluidized bed gasifier at Guessing/Austria

Renewable energy & power quality journal, Mar 1, 2007

Research paper thumbnail of Innovative laboratory unit for pre-testing of oxygen carriers for chemical-looping combustion

Biomass Conversion and Biorefinery, May 5, 2021

Research paper thumbnail of Power to Fuels: Dynamic Modeling of a Slurry Bubble Column Reactor in Lab-Scale for Fischer Tropsch Synthesis under Variable Load of Synthesis Gas

Applied sciences, Mar 28, 2018

Research paper thumbnail of Cold flow modelling of char concentration in the recirculated bed material stream of a dual fluidized bed steam gasification system

Research paper thumbnail of Design Requirements for Pressurized Chemical Looping Reforming

Research paper thumbnail of H2-Rich Syngas from Renewable Sources by Dual Fluidized Bed Steam Gasification of Solid Biomass

Research paper thumbnail of The Gas Flow in the Loop Seals of a Dual Circulating Fluidized Bed: Splitting of the Fluidizing Agent and Gas Leakage through the Loop Seals

Research paper thumbnail of Comparison of Four Different Methods for Measuring the Solids Circulation Rate in Circulating Fluidized Beds

Research paper thumbnail of Effect of Time-Dependent Layer Formation on the Oxygen Transport Capacity of Ilmenite During Combustion of Ash-Rich Woody Biomass

Research paper thumbnail of Thermal Twin 4.0: Digital Support Tool for Optimizing Hazardous Waste Rotary Kiln Incineration Plants

Waste and Biomass Valorization

The present paper focuses on developing a novel virtual representation framework for optimizing s... more The present paper focuses on developing a novel virtual representation framework for optimizing standalone hazardous waste rotary kiln incineration plants. A digital support tool can be provided to optimize the plant's waste management, operation, and maintenance by combining thermochemical-based simulation models with a fuel classification system. First of all, the virtual representation can be used to determine the waste composition of not entirely analyzed waste streams. Furthermore, the determined waste compositions of historically fed waste streams can be used to enable further advanced applications. The determined waste compositions are linked with the appropriate waste code and supplier, which first enables the monitoring of the delivered waste streams. In the case of recurring fractions, the virtual representation can be used to optimize the barrel sequence to reach homogenous waste inputs. Additionally, the plant operation can be optimized regarding stable operation con...

Research paper thumbnail of Development of Process Routes for Synthetic Biofuels from Biomass (BTL)

In Güssing a nearly nitrogen free product gas can be provided by the Fast Internal Circulating Fl... more In Güssing a nearly nitrogen free product gas can be provided by the Fast Internal Circulating Fluidized Bed (FICFB) – gasification system. The main components of the product gas are hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2) and methane (CH4). A Fischer – Tropsch (FT­) trial plant uses the product gas components H2 and CO in an exothermic, catalytic reaction to produce hydrocarbon chains. Catalysts based on iron and cobalt are used for the synthesis. In Güssing a slurry reactor is used for low temperature FT – synthesis. The main parts of the plant are the gas cleaning section, the gas compression section, the FT – slurry reactor and the product separation section. In the year 2008 eight experiments with a catalyst based on iron and from April to July 2009 ten experiments with a catalyst based on cobalt were done. Over 1400 operating hours were reached and approximately 170 kg of FT – raw product was produced. The product of the experiments with cobalt catalyst was split into the fractions naphtha, diesel and waxes by vacuum distillation. The long chain waxes of the distillation were used in a hydro – treater to convert them to diesel.

Research paper thumbnail of Simulation of a Polygeneration Process for the Generation of Hydrogen, H 2 CH 4 , and District Heat via Sorption Enhanced Reforming of Wood Chips

In this work, a polygeneration process for the generation of H2, H2CH4 (a gas mixture composed of... more In this work, a polygeneration process for the generation of H2, H2CH4 (a gas mixture composed of H2 and CH4, sometimes referred to as hythane), and district heat was simulated using the process simulation software IPSEpro. The process employed sorption enhanced reforming of wood chips using the dual fluidized bed steam gasification technology. In addition, two pressure swing adsorption units using carbon molecular sieve and activated carbon as adsorbents were employed in order to separate H2 and H2CH4 from the generated product gas. The simulation parameters were based on results from experimental approaches from different pilot gasifiers and a lab-scale pressure swing adsorption unit. The obtained mass and energy balances show the feasibility of the process layout for generation of H2, H2CH4, and district heat. The generated H2CH4 gas mixture could be used as supplement of fossil CH4 in natural gas grids. An overall wet fuel based production efficiency of 82 % was reached.

Research paper thumbnail of Experimental demonstration of 80 kWth chemical looping combustion of biogenic feedstock coupled with direct CO2 utilization by exhaust gas methanation

Biomass Conversion and Biorefinery, May 10, 2023

Research paper thumbnail of Fluid-Dynamic Investigations in a Cold Model for a Dual Fluidized Bed Biomass Steam Gasification Process: Optimization of the Cyclone

Research paper thumbnail of Experimental Demonstration and Validation of Hydrogen Production Based on Gasification of Lignocellulosic Feedstock

ChemEngineering, Dec 11, 2018

Research paper thumbnail of Co-Gasification of Biomass and Coal in an 8MW Dual Fluidized Bed Steam Gasifier

Research paper thumbnail of Behavior of GCMS tar components in a water gas shift unit operated with tar-rich product gas from an industrial scale dual fluidized bed biomass steam gasification plant

Biomass Conversion and Biorefinery, Apr 15, 2016

Research paper thumbnail of Chemical Looping Pilot Plant Results Using a Nickel-Based Oxygen Carrier

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, Mar 1, 2011

Research paper thumbnail of Steam gasification of various feedstocks at a dual fluidised bed gasifier: Impacts of operation conditions and bed materials

Biomass Conversion and Biorefinery, Feb 25, 2011

Research paper thumbnail of Experimental investigation of hydrogen-intensified synthetic natural gas production via biomass gasification: a technical comparison of different production pathways

Biomass Conversion and Biorefinery, May 26, 2023

Research paper thumbnail of Modelling and simulation of the biomass fired dual fluidized bed gasifier at Guessing/Austria

Renewable energy & power quality journal, Mar 1, 2007

Research paper thumbnail of Innovative laboratory unit for pre-testing of oxygen carriers for chemical-looping combustion

Biomass Conversion and Biorefinery, May 5, 2021

Research paper thumbnail of Power to Fuels: Dynamic Modeling of a Slurry Bubble Column Reactor in Lab-Scale for Fischer Tropsch Synthesis under Variable Load of Synthesis Gas

Applied sciences, Mar 28, 2018

Research paper thumbnail of Cold flow modelling of char concentration in the recirculated bed material stream of a dual fluidized bed steam gasification system

Research paper thumbnail of Design Requirements for Pressurized Chemical Looping Reforming

Research paper thumbnail of H2-Rich Syngas from Renewable Sources by Dual Fluidized Bed Steam Gasification of Solid Biomass

Research paper thumbnail of The Gas Flow in the Loop Seals of a Dual Circulating Fluidized Bed: Splitting of the Fluidizing Agent and Gas Leakage through the Loop Seals

Research paper thumbnail of Comparison of Four Different Methods for Measuring the Solids Circulation Rate in Circulating Fluidized Beds

Research paper thumbnail of Effect of Time-Dependent Layer Formation on the Oxygen Transport Capacity of Ilmenite During Combustion of Ash-Rich Woody Biomass

Research paper thumbnail of Thermal Twin 4.0: Digital Support Tool for Optimizing Hazardous Waste Rotary Kiln Incineration Plants

Waste and Biomass Valorization

The present paper focuses on developing a novel virtual representation framework for optimizing s... more The present paper focuses on developing a novel virtual representation framework for optimizing standalone hazardous waste rotary kiln incineration plants. A digital support tool can be provided to optimize the plant's waste management, operation, and maintenance by combining thermochemical-based simulation models with a fuel classification system. First of all, the virtual representation can be used to determine the waste composition of not entirely analyzed waste streams. Furthermore, the determined waste compositions of historically fed waste streams can be used to enable further advanced applications. The determined waste compositions are linked with the appropriate waste code and supplier, which first enables the monitoring of the delivered waste streams. In the case of recurring fractions, the virtual representation can be used to optimize the barrel sequence to reach homogenous waste inputs. Additionally, the plant operation can be optimized regarding stable operation con...

Research paper thumbnail of Development of Process Routes for Synthetic Biofuels from Biomass (BTL)

In Güssing a nearly nitrogen free product gas can be provided by the Fast Internal Circulating Fl... more In Güssing a nearly nitrogen free product gas can be provided by the Fast Internal Circulating Fluidized Bed (FICFB) – gasification system. The main components of the product gas are hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2) and methane (CH4). A Fischer – Tropsch (FT­) trial plant uses the product gas components H2 and CO in an exothermic, catalytic reaction to produce hydrocarbon chains. Catalysts based on iron and cobalt are used for the synthesis. In Güssing a slurry reactor is used for low temperature FT – synthesis. The main parts of the plant are the gas cleaning section, the gas compression section, the FT – slurry reactor and the product separation section. In the year 2008 eight experiments with a catalyst based on iron and from April to July 2009 ten experiments with a catalyst based on cobalt were done. Over 1400 operating hours were reached and approximately 170 kg of FT – raw product was produced. The product of the experiments with cobalt catalyst was split into the fractions naphtha, diesel and waxes by vacuum distillation. The long chain waxes of the distillation were used in a hydro – treater to convert them to diesel.

Research paper thumbnail of Simulation of a Polygeneration Process for the Generation of Hydrogen, H 2 CH 4 , and District Heat via Sorption Enhanced Reforming of Wood Chips

In this work, a polygeneration process for the generation of H2, H2CH4 (a gas mixture composed of... more In this work, a polygeneration process for the generation of H2, H2CH4 (a gas mixture composed of H2 and CH4, sometimes referred to as hythane), and district heat was simulated using the process simulation software IPSEpro. The process employed sorption enhanced reforming of wood chips using the dual fluidized bed steam gasification technology. In addition, two pressure swing adsorption units using carbon molecular sieve and activated carbon as adsorbents were employed in order to separate H2 and H2CH4 from the generated product gas. The simulation parameters were based on results from experimental approaches from different pilot gasifiers and a lab-scale pressure swing adsorption unit. The obtained mass and energy balances show the feasibility of the process layout for generation of H2, H2CH4, and district heat. The generated H2CH4 gas mixture could be used as supplement of fossil CH4 in natural gas grids. An overall wet fuel based production efficiency of 82 % was reached.

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