Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed
The raw material requirements for the indirect liquefaction 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-...
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North Carolina State University
2014-03-01
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doaj-6dc46fa3a00e47488272b80c69bc1eae2020-11-24T23:00:02ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-03-01922621263310.15376/biores.9.2.2621-2633Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow BedChao Chen0Chunjiang Yu1Jinsong Zhou2Yangyang Xiang3Zhongyang Luo4Zhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityZhejiang UniversityThe raw material requirements for the indirect liquefaction 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 liquefaction 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.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_Chen_Optimization_Gasification_Entrained_BedBiomass gasificationStaged gasificationOptimization modelHigh-temperature entrained-flow bed |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chao Chen Chunjiang Yu Jinsong Zhou Yangyang Xiang Zhongyang Luo |
spellingShingle |
Chao Chen Chunjiang Yu Jinsong Zhou Yangyang Xiang Zhongyang Luo Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed BioResources Biomass gasification Staged gasification Optimization model High-temperature entrained-flow bed |
author_facet |
Chao Chen Chunjiang Yu Jinsong Zhou Yangyang Xiang Zhongyang Luo |
author_sort |
Chao Chen |
title |
Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed |
title_short |
Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed |
title_full |
Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed |
title_fullStr |
Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed |
title_full_unstemmed |
Optimization of the Three-stage Biomass Gasification Characteristics in High-temperature Entrained-flow Bed |
title_sort |
optimization of the three-stage biomass gasification characteristics in high-temperature entrained-flow bed |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2014-03-01 |
description |
The raw material requirements for the indirect liquefaction 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 liquefaction 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. |
topic |
Biomass gasification Staged gasification Optimization model High-temperature entrained-flow bed |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_2_Chen_Optimization_Gasification_Entrained_Bed |
work_keys_str_mv |
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