Hydrogen Production Technologies From Ethanol

Ghasemzadeh, Kamran; Jalilnejad, Elham; Tilebon, Seyyed Mohamad Sadati

doi:10.1016/b978-0-12-811458-2.00012-2

Cited by 7 publications

(6 citation statements)

References 127 publications

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“…These results are achievable by sparging nitrogen gas in the system. As reported by Mizuno et al [98], the negative effect of hydrogen partial pressure is overcome and increased up to 65% when the nitrogen sparging is applied in the reactor. In other studies, an increase of 68% (0.85 to 1.43 mol H 2 mol −1 hexose) was achieved by sparging N 2 gas in the system [17].…”

Section: Biohydrogen Production In Anaerobic Membrane Bioreactorsmentioning

confidence: 68%

“…This phenomenon is undesirable since it influences the microbial pathways and metabolic flux and leads to formation of lactate and other solvents (such as ethanol, acetone butanol). Therefore, hydrogen production yield is suppressed in this way and removing excess hydrogen seems mandatory to maintain hydrogen production in the system [17,98]. These results are achievable by sparging nitrogen gas in the system.…”

Section: Biohydrogen Production In Anaerobic Membrane Bioreactorsmentioning

confidence: 99%

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Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

et al. 2019

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Biohydrogen is a clean and viable energy carrier generated through various green and renewable energy sources such as biomass. This review focused on the application of membrane bioreactors (MBRs), emphasizing the combination of these devices with biological processes, for bio-derived hydrogen production. Direct biophotolysis, indirect biophotolysis, photo-fermentation, dark fermentation, and conventional techniques are discussed as the common methods of biohydrogen production. The anaerobic process membrane bioreactors (AnMBRs) technology is presented and discussed as a preferable choice for producing biohydrogen due to its low cost and the ability of overcoming problems posed by carbon emissions. General features of AnMBRs and operational parameters are comprehensively overviewed. Although MBRs are being used as a well-established and mature technology with many full-scale plants around the world, membrane fouling still remains a serious obstacle and a future challenge. Therefore, this review highlights the main benefits and drawbacks of MBRs application, also discussing the comparison between organic and inorganic membranes utilization to determine which may constitute the best solution for providing pure hydrogen. Nevertheless, research is still needed to overcome remaining barriers to practical applications such as low yields and production rates, and to identify biohydrogen as one of the most appealing renewable energies in the future.

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Section: Biohydrogen Production In Anaerobic Membrane Bioreactorsmentioning

confidence: 68%

Section: Biohydrogen Production In Anaerobic Membrane Bioreactorsmentioning

confidence: 99%

Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

et al. 2019

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“…Water removal from the reaction zone can increase EtLA production, which was normally evaporated in traditional reactors. The membrane separation process has been used in many chemical production processes [ 10 , 11 , 12 , 13 , 14 , 15 ]. Water selective membranes can efficiently separate water from the reaction mixture and improve performance.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Polymeric and Silica-Based Multi-Bed Pervaporation Membrane Reactors during Ethyl Levulinate Production

et al. 2022

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A detailed numerical study of ethyl levulinate (EtLA) production with levulinic acid (LA) and ethanol (Et) in a multi-bed traditional reactor (MB-TR) and a silica-based and polymeric multi-bed pervaporation membrane reactors (MB-PVMR) was conducted and the efficiency of each design was studied under different operation conditions. Due to water production in the EtLA production process, water removal by a pervaporation system may improve process performance. Our results showed that MB-PVMR had higher performance compared with MB-TR. In addition, the silica membrane was more effective in water removal compared with the polymeric membrane. Therefore, higher LA conversion was achievable by a silica-based multi-bed pervaporation membrane reactor (SMB-PVMR). All the results were evaluated for percentage of water removal and LA conversion, based on variations in the Et/LA molar ratio, feed molar flow, reaction zone temperature, and catalyst loading. The results showed that water removal was higher than 95% and LA conversion of about 95% was attained by SMB-PVMR.

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“…Although the reaction stoichiometry determines the ethanol-to-steam (EtOH/ H 2 O) molar ratio of 1 : 3, the use of excess water is advisable because bioethanol produced renewable in the fermentation process of biomass is a mixture of ethanol and water with a molar ratio of 1 : 7 to 1 : 13. Hence, it is advantageous to use bioethanol directly, i.e., without an energy-consuming ethanol distillation process, as this allows the final fuel cost to be minimized (Ni et al, 2007;Subramani and Song, 2007;Llorca et al, 2013;Bineli et al, 2016;Ghasemzadeh et al, 2019). Moreover, the excess water favors the water-gas shift reaction which is particularly important because it converts CO to CO 2 and H 2 products (Subramani and Song, 2007;Bineli et al, 2016;Zhurka et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the excess water favors the water-gas shift reaction which is particularly important because it converts CO to CO 2 and H 2 products (Subramani and Song, 2007;Bineli et al, 2016;Zhurka et al, 2018). Therefore, to maximize the amount of H 2 produced, it is essential to ensure a sufficient supply of water (Comas et al, 2004;Ni et al, 2007;Ghasemzadeh et al, 2019). Furthermore, it is also well known that carbon formation can be minimized by gasification with steam, which means that the excess of water allows for reducing the formation of carbon deposits (Comas et al, 2004;Bineli et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Bioethanol Steam Reforming over Cobalt-Containing USY and ZSM-5 Commercial Zeolite Catalysts

et al. 2020

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Hydrogen Production Technologies From Ethanol

Cited by 7 publications

References 127 publications

Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

Recent Progresses in Application of Membrane Bioreactors in Production of Biohydrogen

Performance Comparison of Polymeric and Silica-Based Multi-Bed Pervaporation Membrane Reactors during Ethyl Levulinate Production

Bioethanol Steam Reforming over Cobalt-Containing USY and ZSM-5 Commercial Zeolite Catalysts

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