木屑炭水蒸气气化制备合成气

doi:10.3969/j.issn.1673-5854.2017.05.004

Abstract

Abstract: Steam gasification of sawdust-char was studied in updraft fixed bed reactor to prepare syngas. The effects of temperature and steam flow rate on products distribution, char conversion rate, gas yield, gas composition and the ratio of H₂/CO were investigated. The results showed that temperature had a positive effect on sawdust-char steam gasification, the maximum char conversion rate and gas yield of 99.2% and 4.16 L/g were obtained at 950 ℃. However, the increase of temperature would cause the decrease of H₂ concentration from 65.8% to 61.2%. In the meantime, the ratio of H₂/CO decreased from 10.3 to 3.35. Increasing steam flow rate could improve H₂ concentration from 59.8% to 62%, but there was no change in gasification consequences with the steam flow rate higher than 0.6 g/min. In addition, the temperature of 900 ℃and the steam flow rate of 0.6 g/min were the optimum operating conditions, and the char conversion rate of 93.3% and gas yield of 4.06 L/g could be obtained. Furthermore, the ratio of H₂/CO could arrive to 4.11, meeting the requirement of methanation.

Key words: sawdust-char, gasification, syngas, carbon conversion rate, H₂/CO

CLC Number:

TQ35
TK6

JIA Shuang, YING Hao, SUN Yunjuan, SUN Ning, XU Wei, XU Yu, NING Siyun. Steam Gasification of Sawdust-char for Syngas[J]. bce, 2017, 51(5): 23-28.

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Steam Gasification of Sawdust-char for Syngas

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