木屑炭高温CO2气化特性研究

doi:10.3969/j.issn.1673-5854.2017.05.008

生物质化学工程 ›› 2017, Vol. 51 ›› Issue (5): 49-53.doi: 10.3969/j.issn.1673-5854.2017.05.008

木屑炭高温CO₂气化特性研究

徐卫, 孙宁, 应浩, 孙云娟, 许玉, 贾爽

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:2016-08-26 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:徐卫(1989—),男,江苏徐州人,工程师,硕士,研究方向:生物质热化学转化技术研究
基金资助:
"十二五"国家科技支撑计划资助（2015BAD21B05）；中国林科院林业新技术所基本科研业务费专项资金（CAFINT2014K04）；林业科学技术推广项目（[2016]15）

Characteristics of High-temperature Carbon Dioxide Gasification of Sawdust-derived Char

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

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:2016-08-26 Online:2017-09-30 Published:2017-09-30

摘要/Abstract

摘要： 在高温固定床反应器中，以木屑炭为原料，进行木屑炭CO₂气化的特性研究。考察了气化温度和CO₂流量对燃气各组分体积分数、热值、固体产率、产气率的影响。结果表明：随着气化温度从750 ℃升高到950 ℃，CO体积分数明显增加，CO₂体积分数明显减少，燃气热值增加较明显，而从950 ℃升高到1 050 ℃时，燃气热值增加趋势减缓。CO₂作为气化介质，随着其流量增加，固体产率减少，气体产率增加，燃气组分中CO₂体积分数明显增加，CO体积分数先增加后减少，燃气热值先增大后减小。CO₂流量为15 mL/（min·g）时，燃气热值最大。气化温度950 ℃、CO₂流量15 mL/（min·g）为较佳的气化条件，此时气化制备的气体中CO体积分数为51.51%，CO₂体积分数为37.99%，燃气热值为8.03 MJ/m³，产气率为0.78 L/g。

关键词: 木屑炭, CO₂气化, 温度, 产气率, 热值

Abstract: The characteristics of carbon dioxide(CO₂) gasification of sawdust-derived char were studied in high-temperature fixed bed reactor. The effects of temperature and CO₂ flow rate on the volume fraction of gas compositions, low heating value(Q_LHV), gas yield, and solid yield were investigated. The results showed that with the temperature increasing from 750 ℃ to 950 ℃, the volume fraction of CO increased and that of CO₂ reduced, and the Q_LHV of the fuel gas increased obviously, the change trend of Q_LHV was not obvious from 950 ℃ to 1 050 ℃. With the increase of CO₂ flow rate, which was used as the gasification agent, the solid yield reduced, the gas yield increased, and the volume fraction of CO₂ increased obviously, while the volume fraction of CO and Q_LHV increased firstly and then reduced. When the flow rate of CO₂was 15 mL/(min·g), the Q_LHV was up to the largest. The optimized conditions were the gasification temperature 950 ℃ and CO₂ flow rate 15 mL/(min·g). Under these conditions,the volume fraction of CO was 51.51%, the volume fraction of CO₂ was 37.99%, the Q_LHV was 8.03 MJ/m³, and the gas yield was 0.78 L/g.

Key words: sawdust-derived char, CO₂ gasification, temperature, gas yield, heat value

中图分类号:

TQ35

徐卫, 孙宁, 应浩, 孙云娟, 许玉, 贾爽. 木屑炭高温CO₂气化特性研究[J]. 生物质化学工程, 2017, 51(5): 49-53.

XU Wei, SUN Ning, YING Hao, SUN Yunjuan, XU Yu, JIA Shuang. Characteristics of High-temperature Carbon Dioxide Gasification of Sawdust-derived Char[J]. bce, 2017, 51(5): 49-53.

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木屑炭高温CO₂气化特性研究

Characteristics of High-temperature Carbon Dioxide Gasification of Sawdust-derived Char

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