Exergetic, economic and carbon emission studies of bio-olefin production via indirect steam gasification process

Jiang, Peng, Parvez, Ashak Mahmud, Meng, Yang, Xu, Meng-xia, Shui, Tian-chi, Sun, Cheng-gong and Wu, Tao (2019) Exergetic, economic and carbon emission studies of bio-olefin production via indirect steam gasification process. Energy, 187 . p. 115933. ISSN 03605442

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The indirect steam gasification of biomass to olefins (IDBTO) coupled with CO2 utilization was proposed and simulated. Energy and exergy efficiencies, net CO2 emissions, and economic evaluation were performed against IDBTO as well as the direct oxygen-steam gasification of biomass to olifins (DBTO). The influences of unreacted gas recycling fraction (RU) and CO2 to dry biomass mass ratio (CO2/B) on the thermodynamic performance of the processes were also studied. The results showed that the yields of olefins of DBTO and IDBTO were 17 wt% and 19 wt%, respectively, the overall energy and exergy efficiencies of the IDBTO were around 49% and 44%, which were 8% and 7% higher than those of the DBTO process, respectively. A higher RU was found favor higher energy and exergy efficiencies for both routes. Besides, for the IDBTO process, it is found that the addition of CO2 to gasification system led to an improvement in both energy efficiency and exergy efficiency by around 1.6%. Moreover, life-cycle net CO2 emission was predicted to be -4.4 kg CO2 eq./ kg olefins for IDBTO, while for DBTO, it was -8.7 kg CO2 eq./ kg. However, the quantitative economic performance of IDBTO was superior to that of the DBTO process.

Item Type: Article
Additional Information: The paper is under GUPL
Keywords: Bio-olefin; Thermodynamic analysis; Environmental assessment; CO2 utilization; Negative net CO2 emission; Techno-economic analysis
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Chemical and Environmental Engineering
Identification Number: https://doi.org/10.1016/j.energy.2019.115933
Depositing User: QIU, Lulu
Date Deposited: 18 Sep 2019 00:57
Last Modified: 18 Sep 2019 00:57
URI: https://eprints.nottingham.ac.uk/id/eprint/59003

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