木屑炭水蒸气气化制备合成气

doi:10.3969/j.issn.1673-5854.2017.05.004

生物质化学工程 ›› 2017, Vol. 51 ›› Issue (5): 23-28.doi: 10.3969/j.issn.1673-5854.2017.05.004

木屑炭水蒸气气化制备合成气

贾爽, 应浩, 孙云娟, 孙宁, 徐卫, 许玉, 宁思云

中国林业科学研究院林产化学工业研究所; 生物质化学利用国家工程实验室; 国家林业局林产化学工程重点开放性实验室; 江苏省生物质能源与材料重点实验室, 江苏南京 210042

收稿日期:2016-07-20 出版日期:2017-09-30 发布日期:2017-09-30
通讯作者: 应浩(1963—),男,研究员,硕士生导师,研究领域:生物质能转化技术开发与工业应用;E-mail:hy2478@163.com。 E-mail:hy2478@163.com
作者简介:贾爽(1992—),男,四川资阳人,硕士生,研究方向:生物质热化学转化技术
基金资助:
林业科学技术推广项目（[2015]31）；"十二五"国家科技支撑计划资助（2015BAD15B06）；江苏省生物质能源与材料重点实验室项目（JSBEM-201606）

Steam Gasification of Sawdust-char for Syngas

JIA Shuang, YING Hao, SUN Yunjuan, SUN Ning, XU Wei, XU Yu, NING Siyun

Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab.for Biomass Chemical Utilization; Key and Open Lab.of Forest Chemical Engineering, SFA; Key Lab.of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China

Received:2016-07-20 Online:2017-09-30 Published:2017-09-30

摘要/Abstract

摘要： 以木屑炭为原料，在上吸式固定床气化炉中进行水蒸气气化制备合成气，考察了温度和水蒸气流量对木屑炭水蒸气气化的产物分布、炭转化率、产气率、组成含量和H₂/CO值的影响。结果表明：升高温度有助于木屑炭气化，炭转化率和产气率分别在950 ℃下达到最大值99.2%和4.16 L/g，但温度升高会导致H₂从65.8%降至61.2%，同时H₂/CO也呈下降趋势，从10.3降至3.35；水蒸气流量的增加可提升H₂，从59.8%升至62%，但流量升至0.6 g/min时气化结果趋于稳定。水蒸气气化的最佳操作条件为900 ℃，水蒸气流量0.6 g/min，此条件下炭转化率、产气率和热值分别达到93.3%、4.06 L/g和9.04 MJ/m³，H₂/CO值为4.11，适合于合成甲烷。

关键词: 木屑炭, 气化, 合成气, 炭转化率, H₂/CO

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

中图分类号:

TQ35
TK6

贾爽, 应浩, 孙云娟, 孙宁, 徐卫, 许玉, 宁思云. 木屑炭水蒸气气化制备合成气[J]. 生物质化学工程, 2017, 51(5): 23-28.

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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木屑炭水蒸气气化制备合成气

Steam Gasification of Sawdust-char for Syngas

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