木屑高温水蒸气气化制备富氢燃气的特性研究  

High-temperature Steam Gasification of Sawdust for Production of Hydrogen-rich Gas

作　　者：李琳娜[1] 应浩[1,2] 涂军令[1] 孙云娟[1,2] 许玉[1,2] 

机构地区：[1]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 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《林产化学与工业》2011年第5期18-24,共7页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(30972318);林业公益性行业科研专项项目(200904062)

摘　　要：在高温固定床反应器内,无催化剂作用下,进行了木屑高温水蒸气气化制取富氢燃气的特性研究。实验主要研究3 g原料,反应温度(750～1 050℃)及水蒸气流量(0～1.5 g/min)对燃气组分、产氢率、燃气热值(QLHV)等气化过程评价指标的影响。实验结果表明:反应温度和水蒸气流量对燃气组分影响很大,较高的反应温度和加入适量的水蒸气有利于氢气的产生,但随着反应温度的升高和水蒸气流量的增加会使燃气热值降低。在1 000℃时,水蒸气流量为1.02 g/min时,燃气中氢气体积分数可达51.03%,产氢率为71.08 g/kg(以干燥基计,下同),为理论最大产氢率(172.02 g/kg)的41.32%。考虑到实际操作过程,在反应温度为850℃时,水蒸气流量的最佳值为1.02 g/min。木屑高温水蒸气气化所得燃气热值在11～13 MJ/m3范围内变化。研究结果证明,高温水蒸气气化是生物质制取富氢燃气的一种有效方法。Steam gasification experiments of sawdust for production of hydrogen-rich gas were carried out in a high-temperature bench-scale fixed bed reactor without catalyst.The effects of material 3 g,temperature（750-1 050℃） and steam flow rate（0-1.5g/min）on the gas components,hydrogen yield,low heating value（QLHV） of gas and other evaluations for gasification were investigated.The results indicated that the temperature and steam flow rate had great effect on the fuel gas components.The yield of hydrogen was promoted by increasing the temperature and introduction of proper steam.However,heating value of product was decreased with the increasing amount of steam at high temperature.As the temperature was 1000℃ and steam flow rate was 1.02 g/min,the hydrogen content reached the maximum,up to 51.03 %.Besides,the maximum hydrogen yield was 71.08 g/kg（dry basis）,which was 41.32 % of the theoretical maximum yield of 172.02 g/kg（dry basis） for this feedstock.The optimal flow rate of steam was 1.02 g/min at 850 ℃.Over the range of the experimental conditions used,the LHV of the fuel gas was between 11 and 13 MJ/m3.The experimental results proved that high-temperature steam gasification is an effective method-ology for hydrogen-rich gas production using biomass as feedstock.

关 键 词：生物质 高温 水蒸气气化 制氢 

分 类 号：TQ351[化学工程] TK6[动力工程及工程热物理—生物能]