木屑炭水蒸气催化气化制取合成气研究  

CATALYTIC STEAM GASIFICATION OF SAWDUST-CHAR FOR SYNGAS

作　　者：宁思云 应浩[1,2,3,4] 徐卫 尹航[1,2,3,4] 朱立 贾爽[1,2,3,4] Ning Siyun;Ying Hao;Xu Wei;Yin Hang;Zhu Li;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,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,南京210042

出　　处：《太阳能学报》2020年第2期20-26,共7页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2017YFD0601206);广东省引进创新创业团队项目(2016ZT06N467);江苏省林业科技创新与推广项目(LYKJ[2017]47);苏教师[2019]3号江苏高校“青蓝工程”优秀教学团队(019-69)。

摘　　要：以木屑炭为原料,K2CO3作为催化剂,以固定床气化炉为实验设备,进行水蒸气催化气化木屑炭的探究。考察木屑炭水蒸气气化的炭转化率、产氢率、气体组成体积分数和H2/CO比值随K2CO3催化剂质量分数(0~8%)、水蒸气流量(0.15~0.35 g/(min·g))、气化温度(800~950℃)变化的规律。实验结果表明:K2CO3催化剂可显著提升碳转化率及产氢率,K2CO3质量分数为8%时,碳转化率和产氢率分别达到86.3%和125.6 g/kg,同时合成气中CO体积分数显著增加,H2/CO比值降至2.43。增加水蒸气流量,合成气中H2含量显著增大,H2/CO比值随之增大。温度可有效促进炭气化过程,950℃时碳转化率和产氢率分别达到84.3%和127.1 g/kg,但合成气中CO体积分数增大,H2/CO比值降至2.48。实验得到H2/CO比值在2.43~5.16范围的合成气。气化反应温度在900℃、水蒸气0.2 g/(min·g)、K2CO3质量分数3%时,碳转化率可达80.4%,产氢率109.6 g/kg,合成气中(H2+CO)体积分数82.4%,同时H2/CO比值高达3.05。Steam gasification experiment of sawdust charcoal for syngas was carried out in updraft fixed bed,with K2CO3 as catalyst in the article. The effects of catalyst dosage(0-8%),steam flow rate(0.15-0.35 g/(min·g))and temperature(800-950 ℃) on carbon conversion rate,hydrogen yield,gas composition and H2/CO ratio has been investigated. The experimental results show that K2CO3 catalyst can increase the carbon conversion rate and hydrogen yield,when the K2CO3 dosage is added to 8%,the carbon conversion and hydrogen yield can reach 86.3% and 125.6 g/kg respectively,but the CO composition increases greatly with the addition of K2CO3,resulting in a decrease in H2/CO ratio. The H2 composition and the H2/CO ratio enhances with the increases of steam flow rate. The rise of temperature can promote carbon gasification reaction,the carbon conversion and hydrogen yield can reach 84.3% and 127.1 g/kg at 950 ℃,but the CO composition rises sharply,and the ratio of H2/CO decreases. The syngas of H2/CO ratio in the range of 2.43-5.16 was obtained. When the experiment temperature is 900 ℃,the steam flow rate is 0.2 g/(min · g),and the K2CO3 dosage is 3%,the carbon conversion rate is 80.4%,the hydrogen yield is 109.6 g/kg,(H2+CO)composition is 82.4%,and H2/CO ratio is relatively high,up to 3.05.

关 键 词：木屑炭 催化气化 合成气 H2/CO 

分 类 号：TK6[动力工程及工程热物理—生物能]