Hydrogen and power co-production from autothermal biomass sorption enhanced chemical looping gasification: Thermodynamic modeling and comparative study.
In: Energy Conversion & Management, Jg. 269 (2022-10-01), S. N.PAG
academicJournal
Zugriff:
[Display omitted] • SECLG is able to achieve higher energy performance than SEG. • Raising T car and FCC are recommended for better system performance. • The energy efficiency is highly impacted by energy penalty indicated by F comb and R Ni/C. • Energy penalty from higher calcination temperature is crucial in oxy-SEG and oxy-SECLG. Calcium looping and chemical looping technologies envisage advanced solutions for H 2 production. This study compared the H 2 and power co-production from biomass sorption enhanced gasification (SEG) and sorption enhanced chemical looping gasification (SECLG) under autothermal conditions with thermodynamic simulation. The thermal self-sufficiency of calcination was achieved by splitting biomass for combustion and oxidizing the reduced oxygen carrier, respectively. It was found that SECLG was able to achieve higher energy efficiency (64.6%) than SEG (55.7%) at the optimized carbonator temperature. In both processes, parametric analysis illustrates that under the autothermal-available carbonator temperature range, higher carbonator temperature and fixed carbon conversion are recommended to achieve higher H 2 yields and energy efficiencies, owing to lower energy penalty leading to lower requirement of combusted biomass content or Ni/C molar ratio for thermal self-sufficiency. Elevating carbonator pressure slightly improved the energy performance. Regarding CO 2 capture through oxyfuel combustion in SEG and SECLG processes, the energy penalty from higher calcination temperature greatly degraded the energy performance, which was even higher than the power consumption of air separation unit. According to exergy analysis, the main exergy destruction occurred at the syngas production section (∼49%). From the view of energy performance, SECLG is a promising autothermal strategy for SEG upgrade. [ABSTRACT FROM AUTHOR]
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Hydrogen and power co-production from autothermal biomass sorption enhanced chemical looping gasification: Thermodynamic modeling and comparative study.
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Autor/in / Beteiligte Person: | Liu, Guicai ; Zhao, Ya ; Heberlein, Stephan ; Veksha, Andrei ; Giannis, Apostolos ; Ping Chan, Wei ; Thye Lim, Teik ; Lisak, Grzegorz |
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Zeitschrift: | Energy Conversion & Management, Jg. 269 (2022-10-01), S. N.PAG |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0196-8904 (print) |
DOI: | 10.1016/j.enconman.2022.116087 |
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