The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
Christian Hulteberg - One of the best experts on this subject based on the ideXlab platform.
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GLYCEROL-BASED ISOBUTANOL
2020Co-Authors: Fredric Bauer, Christian HultebergAbstract:In the search for renewable vehicle fuels several different gasoline additives have been discussed and reviewed. Today bioethanol is the most commonly used option, but isobutanol is being proposed as a better alternative by many stakeholders, due to its superior fuel characteristics, e.g. energy density, oxygen content and vapor pressure. The research project “Glycerol-based isobutanol” has investigated the possibility to produce isobutanol from glycerol with respect to feedstock availability, process economics and savings in GHG emissions. The process has been studied both as a Stand-Alone fuel production process and integrated with an existing petroleum refinery, a case study together with Preemraff Lysekil. The starting point for the process is glycerol, a waste product from the production of first generation biofuels. Glycerol is a significant byproduct from biodiesel production, in which glycerol corresponds to about 10% (w/w) of the total fuel production. The rapidly increasing production of biodiesel, and thus also glycerol, has led to a market collapse for glycerol in the last decade. This has led to an increasing interest in glycerol as a feedstock for renewable fuels and chemicals. Glycerol is also formed as a byproduct in the production of bioethanol, this quantity is however not utilized today, but in future scenarios glycerol volumes corresponding up to 10% (w/w) of the bioethanol production may become available. Projections from IEA and OECD.FAO show that the production of first generation biofuels will continue to increase, indicating that glycerol will continue to be available as a suitable feedstock for renewable fuels and chemicals. The production of glycerol-based isobutanol is divided into three parts. In the first, glycerol is converted to propanal via acrolein; in the second parallel part, methanol is converted to methanal; in the final part methanal and propanal are condensed to methacrolein which is hydrogenated to isobutanol. Methanol and hydrogen are, besides glycerol, important feedstocks for the process. By using process integration methodology, i.e. pinch analysis, the energy demand of the process has been optimized. The possibility to integrate the production process into an existing petroleum refinery, Preemraff Lysekil, has also been studied. A techno-economic assessment of the process has been performed to calculate the capital investment costs and operation costs of the process. Finally, the greenhouse gas emissions from glycerol-based isobutanol have been calculated and compared with fossil gasoline. The results show that the proposed production process is technically viable. The process has a large heat demand, which to a significant degree can be supplied by internal heat exchanging, according to the results from the process integration studies. Integrating the process with an existing petroleum refinery enables the use of existing utilities and hydrogen production capacity which is an important benefit. The techno-economic assessment shows that the cost for production of glycerol-based isobutanol from a Stand-Alone Plant (1 140 $/m3) is 22% higher than from a Plant integrated with a refinery (935 $/m3). The largest share of the production cost is due to the cost for raw materials, both for the Stand-Alone and integrated case. The calculated production cost is significantly higher than for bioethanol, which is considered to be the main competitor among biobased gasoline blendstocks. The calculations on GHG emissions show that glycerol-based isobutanol is a fuel which yields significant reductions – about 55 %% – in emissions when compared to fossil gasoline. As glycerol from biodiesel production is not loaded with any CO2 emissions according to the EU directive on renewable energy the main contributions are due to the methanol and hydrogen consumed in the process, as both are produced from natural gas. Glycerol-based isobutanol is viable from a technical viewpoint, considering both the proposed production process and the suitability of isobutanol as a gasoline blendstock, and the calculated production cost is in a ranger which could make the process also economically feasible. (Less)
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Isobutanol from glycerine - a techno-economic evaluation of a new biofuel production process.
Applied Energy, 2014Co-Authors: Fredric Bauer, Christian HultebergAbstract:The paper presents a new thermochemical process for the production of isobutanol, which is an excellent biobased gasoline blendstock. The main feedstock for the process is glycerine, obtained as a byproduct in biodiesel production, being used together with methanol. The process was modeled in Aspen Plus. The process design is characterized by a high level of process integration, pinch analysis being used to optimize the process from the start. A techno-economic evaluation of the process, both in a Stand-Alone Plant and in a Plant integrated with an existing petro-refinery was conducted, the estimates for the production cost of isobutanol obtained being 892$/m3 for a refinery-integrated case and 1017$/m3 for a Stand-Alone case. A sensitivity analysis using Monte Carlo methodology showed the production cost estimates to be highly robust. Use of isobutanol rather than fossil gasoline was found to result in 53% reduction in GHG emissions.
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Isobutanol from glycerine - A techno-economic evaluation of a new biofuel production process
Applied Energy, 2014Co-Authors: Fredric Bauer, Christian HultebergAbstract:The paper presents a new thermochemical process for the production of isobutanol, which is an excellent biobased gasoline blendstock. The main feedstock for the process is glycerine, obtained as a byproduct in biodiesel production, being used together with methanol. The process was modeled in Aspen Plus. The process design is characterized by a high level of process integration, pinch analysis being used to optimize the process from the start. A techno-economic evaluation of the process, both in a Stand-Alone Plant and in a Plant integrated with an existing petro-refinery was conducted, the estimates for the production cost of isobutanol obtained being 892$/m3 for a refinery-integrated case and 1017$/m3 for a Stand-Alone case. A sensitivity analysis using Monte Carlo methodology showed the production cost estimates to be highly robust. Use of isobutanol rather than fossil gasoline was found to result in 53% reduction in GHG emissions. © 2014 Elsevier Ltd.
Antonio Bonomi - One of the best experts on this subject based on the ideXlab platform.
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integrated versus stand alone second generation ethanol production from sugarcane bagasse and trash
Bioresource Technology, 2012Co-Authors: Marina O S Dias, Tassia L Junqueira, Otavio Cavalett, Marcelo Pereira Da Cunha, Charles D F Jesus, Carlos Eduardo Vaz Rossell, Rubens Maciel Filho, Antonio BonomiAbstract:Abstract Ethanol production from lignocellulosic materials is often conceived considering independent, Stand-Alone production Plants; in the Brazilian scenario, where part of the potential feedstock (sugarcane bagasse) for second generation ethanol production is already available at conventional first generation production Plants, an integrated first and second generation production process seems to be the most obvious option. In this study Stand-Alone second generation ethanol production from surplus sugarcane bagasse and trash is compared with conventional first generation ethanol production from sugarcane and with integrated first and second generation; simulations were developed to represent the different technological scenarios, which provided data for economic and environmental analysis. Results show that the integrated first and second generation ethanol production process from sugarcane leads to better economic results when compared with the Stand-Alone Plant, especially when advanced hydrolysis technologies and pentoses fermentation are included.
George Tsatsaronis - One of the best experts on this subject based on the ideXlab platform.
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Exergy-based evaluation of methanol production from natural gas with Co2 utilization ☆
Energy, 2017Co-Authors: Timo Blumberg, Tatiana Morosuk, George TsatsaronisAbstract:Abstract Energy and exergy analyses were carried out for a medium-capacity methanol Plant based on a low-pressure synthesis process for natural gas. The process comprises a pretreatment of natural gas, a steam-methane reforming unit for generation of synthesis gas, a methanol synthesis, a distillation of crude methanol, and an integrated steam cycle for waste heat recovery. Carbon dioxide from carbon capture is used for gas conditioning by adjusting the syngas module for methanol synthesis through counterbalancing of the excess hydrogen. A sensitivity analysis was performed to identify favorable operation parameters for the tubular steam reformer. The energetic and exergetic efficiencies for the overall system were found to be 35.9% and 37.7%, respectively. The specific energy requirements (energy intensities) are 19.6 GJth/tCH3OH and 0.8 GJel/tCH3OH, while the specific methane consumption was calculated to be 0.54 ton CH4 per ton CH3OH. Compared to a Stand-Alone Plant, the utilization of carbon dioxide increases the methanol yield by 22%. The exergy analysis shows that the highest inefficiencies occur in the reforming unit, the steam cycle, and the synthesis unit. In particular, the steam reformer, the synthesis reactor, and several heat exchangers show a high potential for thermodynamic improvement.
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Exergy-based evaluation of methanol production from natural gas with CO2utilization
Energy, 2017Co-Authors: Timo Blumberg, Tatiana Morosuk, George TsatsaronisAbstract:Energy and exergy analyses were carried out for a medium-capacity methanol Plant based on a low-pressure synthesis process for natural gas. The process comprises a pretreatment of natural gas, a steam-methane reforming unit for generation of synthesis gas, a methanol synthesis, a distillation of crude methanol, and an integrated steam cycle for waste heat recovery. Carbon dioxide from carbon capture is used for gas conditioning by adjusting the syngas module for methanol synthesis through counterbalancing of the excess hydrogen. A sensitivity analysis was performed to identify favorable operation parameters for the tubular steam reformer. The energetic and exergetic efficiencies for the overall system were found to be 35.9% and 37.7%, respectively. The specific energy requirements (energy intensities) are 19.6 GJth/tCH3OHand 0.8 GJel/tCH3OH, while the specific methane consumption was calculated to be 0.54 ton CH4per ton CH3OH. Compared to a Stand-Alone Plant, the utilization of carbon dioxide increases the methanol yield by 22%. The exergy analysis shows that the highest inefficiencies occur in the reforming unit, the steam cycle, and the synthesis unit. In particular, the steam reformer, the synthesis reactor, and several heat exchangers show a high potential for thermodynamic improvement.
Fredric Bauer - One of the best experts on this subject based on the ideXlab platform.
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GLYCEROL-BASED ISOBUTANOL
2020Co-Authors: Fredric Bauer, Christian HultebergAbstract:In the search for renewable vehicle fuels several different gasoline additives have been discussed and reviewed. Today bioethanol is the most commonly used option, but isobutanol is being proposed as a better alternative by many stakeholders, due to its superior fuel characteristics, e.g. energy density, oxygen content and vapor pressure. The research project “Glycerol-based isobutanol” has investigated the possibility to produce isobutanol from glycerol with respect to feedstock availability, process economics and savings in GHG emissions. The process has been studied both as a Stand-Alone fuel production process and integrated with an existing petroleum refinery, a case study together with Preemraff Lysekil. The starting point for the process is glycerol, a waste product from the production of first generation biofuels. Glycerol is a significant byproduct from biodiesel production, in which glycerol corresponds to about 10% (w/w) of the total fuel production. The rapidly increasing production of biodiesel, and thus also glycerol, has led to a market collapse for glycerol in the last decade. This has led to an increasing interest in glycerol as a feedstock for renewable fuels and chemicals. Glycerol is also formed as a byproduct in the production of bioethanol, this quantity is however not utilized today, but in future scenarios glycerol volumes corresponding up to 10% (w/w) of the bioethanol production may become available. Projections from IEA and OECD.FAO show that the production of first generation biofuels will continue to increase, indicating that glycerol will continue to be available as a suitable feedstock for renewable fuels and chemicals. The production of glycerol-based isobutanol is divided into three parts. In the first, glycerol is converted to propanal via acrolein; in the second parallel part, methanol is converted to methanal; in the final part methanal and propanal are condensed to methacrolein which is hydrogenated to isobutanol. Methanol and hydrogen are, besides glycerol, important feedstocks for the process. By using process integration methodology, i.e. pinch analysis, the energy demand of the process has been optimized. The possibility to integrate the production process into an existing petroleum refinery, Preemraff Lysekil, has also been studied. A techno-economic assessment of the process has been performed to calculate the capital investment costs and operation costs of the process. Finally, the greenhouse gas emissions from glycerol-based isobutanol have been calculated and compared with fossil gasoline. The results show that the proposed production process is technically viable. The process has a large heat demand, which to a significant degree can be supplied by internal heat exchanging, according to the results from the process integration studies. Integrating the process with an existing petroleum refinery enables the use of existing utilities and hydrogen production capacity which is an important benefit. The techno-economic assessment shows that the cost for production of glycerol-based isobutanol from a Stand-Alone Plant (1 140 $/m3) is 22% higher than from a Plant integrated with a refinery (935 $/m3). The largest share of the production cost is due to the cost for raw materials, both for the Stand-Alone and integrated case. The calculated production cost is significantly higher than for bioethanol, which is considered to be the main competitor among biobased gasoline blendstocks. The calculations on GHG emissions show that glycerol-based isobutanol is a fuel which yields significant reductions – about 55 %% – in emissions when compared to fossil gasoline. As glycerol from biodiesel production is not loaded with any CO2 emissions according to the EU directive on renewable energy the main contributions are due to the methanol and hydrogen consumed in the process, as both are produced from natural gas. Glycerol-based isobutanol is viable from a technical viewpoint, considering both the proposed production process and the suitability of isobutanol as a gasoline blendstock, and the calculated production cost is in a ranger which could make the process also economically feasible. (Less)
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Isobutanol from glycerine - a techno-economic evaluation of a new biofuel production process.
Applied Energy, 2014Co-Authors: Fredric Bauer, Christian HultebergAbstract:The paper presents a new thermochemical process for the production of isobutanol, which is an excellent biobased gasoline blendstock. The main feedstock for the process is glycerine, obtained as a byproduct in biodiesel production, being used together with methanol. The process was modeled in Aspen Plus. The process design is characterized by a high level of process integration, pinch analysis being used to optimize the process from the start. A techno-economic evaluation of the process, both in a Stand-Alone Plant and in a Plant integrated with an existing petro-refinery was conducted, the estimates for the production cost of isobutanol obtained being 892$/m3 for a refinery-integrated case and 1017$/m3 for a Stand-Alone case. A sensitivity analysis using Monte Carlo methodology showed the production cost estimates to be highly robust. Use of isobutanol rather than fossil gasoline was found to result in 53% reduction in GHG emissions.
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Isobutanol from glycerine - A techno-economic evaluation of a new biofuel production process
Applied Energy, 2014Co-Authors: Fredric Bauer, Christian HultebergAbstract:The paper presents a new thermochemical process for the production of isobutanol, which is an excellent biobased gasoline blendstock. The main feedstock for the process is glycerine, obtained as a byproduct in biodiesel production, being used together with methanol. The process was modeled in Aspen Plus. The process design is characterized by a high level of process integration, pinch analysis being used to optimize the process from the start. A techno-economic evaluation of the process, both in a Stand-Alone Plant and in a Plant integrated with an existing petro-refinery was conducted, the estimates for the production cost of isobutanol obtained being 892$/m3 for a refinery-integrated case and 1017$/m3 for a Stand-Alone case. A sensitivity analysis using Monte Carlo methodology showed the production cost estimates to be highly robust. Use of isobutanol rather than fossil gasoline was found to result in 53% reduction in GHG emissions. © 2014 Elsevier Ltd.
Marina O S Dias - One of the best experts on this subject based on the ideXlab platform.
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integrated versus stand alone second generation ethanol production from sugarcane bagasse and trash
Bioresource Technology, 2012Co-Authors: Marina O S Dias, Tassia L Junqueira, Otavio Cavalett, Marcelo Pereira Da Cunha, Charles D F Jesus, Carlos Eduardo Vaz Rossell, Rubens Maciel Filho, Antonio BonomiAbstract:Abstract Ethanol production from lignocellulosic materials is often conceived considering independent, Stand-Alone production Plants; in the Brazilian scenario, where part of the potential feedstock (sugarcane bagasse) for second generation ethanol production is already available at conventional first generation production Plants, an integrated first and second generation production process seems to be the most obvious option. In this study Stand-Alone second generation ethanol production from surplus sugarcane bagasse and trash is compared with conventional first generation ethanol production from sugarcane and with integrated first and second generation; simulations were developed to represent the different technological scenarios, which provided data for economic and environmental analysis. Results show that the integrated first and second generation ethanol production process from sugarcane leads to better economic results when compared with the Stand-Alone Plant, especially when advanced hydrolysis technologies and pentoses fermentation are included.