木屑炭高温CO_2气化特性研究  

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

作　　者：徐卫[1,2,3,4] 孙宁 应浩[1,2,3,4] 孙云娟 许玉[1,2,3,4] 贾爽 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)

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开放性实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042

出　　处：《生物质化学工程》2017年第5期49-53,共5页Biomass Chemical Engineering

基　　金："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)

摘　　要：在高温固定床反应器中,以木屑炭为原料,进行木屑炭CO_2气化的特性研究。考察了气化温度和CO_2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,CO_2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。CO_2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CO_2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。CO_2流量为15 mL/(min·g)时,燃气热值最大。气化温度950℃、CO_2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%,CO_2体积分数为37.99%,燃气热值为8.03 MJ/m^3,产气率为0.78 L/g。The characteristics of carbon dioxide （CO2 ） gasification of sawdust-derived char were studied in high-temperature fixed bed reactor. The effects of temperature and COz flow rate on the volume fraction of gas compositions, low heating value（ QLHV ） , 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 QLHV of the fuel gas increased obviously, the change trend of QLHV was not obvious from 950 ℃ to 1050 ℃. 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 QLHV increased firstly and then reduced. When the flow rate of CO2was 15 mL/（ min .g） , the QLHV was up to the largest. The optimized conditions were the gasification temperature 950 ℃ and CO： 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 QLHV was 8.03 MJ/m^3, and the gas yield was 0.78 L/g.

关 键 词：木屑炭 CO2气化 温度 产气率 热值 

分 类 号：TK6[动力工程及工程热物理—生物能]