NDLI: Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed

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Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Chao Chen Chunjiang Yu Jinsong Zhou Yangyang Xiang Zhongyang Luo
Abstract	The raw material requirements for the indirect liqtion of biomass are strict. In particular, the ratio of H2/CO must be greater than or equal to 1. However, traditional biomass gasification has problems that include a low H2/CO ratio and low carbon conversion rates. This study proposes a three-stage gasification optimization model in which pyrolysis products are separated before being put through a second gasification step. The optimized model simulation used MATLAB software and the experiments were carried out in a biomass, high-temperature entrained-flow bed. The results demonstrate that, compared to traditional mixing gasification, three-stage gasification can effectively increase the H2 content in syngas. The H2 content can reach 42.3%, which is 4.6% higher than in traditional gasification. Additionally, this process can increase the H2/CO ratio to 1.23, which is 43% higher than the ratio 0.86 in traditional gasification. This also could provide raw materials for the indirect liqtion of syngas. Thus, three-stage gasification can eliminate the need for intermediate steps such as steam reforming and adding external H2. Experiments indicated that the best gasification conditions were a first gasification time of 0.6s and a gasification temperature of 1100 °C, under which the H2/CO ratio reached a maximum of 1.2.
Related Links	http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_Chen_Optimization_Gasification_Entrained_Bed
e-ISSN	19302126
DOI	10.15376/biores.9.2.2621-2633
Journal	BioResources
Issue Number	2
Volume Number	9
Language	English
Publisher	North Carolina State University
Publisher Date	2014-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Biotechnology Biomass Gasification Staged Gasification Optimization Model High-temperature Entrained-flow Bed
Content Type	Text
Resource Type	Article

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