Journal
BIORESOURCE TECHNOLOGY
Volume 267, Issue -, Pages 102-109Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.07.021
Keywords
Two-stage gasification; Rice husk; Bio-gas; Thermal-cracking; Demonstration plant
Funding
- International S&T Cooperation Program of China [2014DFE70150]
- National Key Technology Research and Development Program [2015BAD21B06]
- International Cooperation Program [S2014ER0016]
- National Natural Science Foundation of China [51741603]
- Natural Science Fund project in Jiangsu Province [BK20170669]
- Science and Technology Support Plan of Jiangsu Province [BE2013705]
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To gasify the biofuel of low ash melting temperature and overcome the high content of tar in bio-gas, a novel two-stage gasification concept is proposed. This concept enables the tar-free bio-gas generated in the gasification process under thermal cracking. On that basis, a demonstration project is introduced. Rice husk acts as the feedstock for its accessibility on-site in the commissioning period. System reliability has been confirmed for the stable operation of more than 60 days. Tests have been performed under some typical operating conditions. As the results suggest, the bio-gas of 6.7 MJ/Nm(3) LHV is generated with cold gas efficiency and carbon conversion of 67.5% and 87% respectively. Elementary economic evaluation of this concept is also made in accordance with the commissioning results. As a result, the annual net profit of 40.92 K USD is yielded without a subsidized price for biomass materials.
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