玉米秸和稻壳热解产物的分布规律  

Distribution Properties of Pyrolysis Products of Corn Stalk and Rice Husks

作　　者：闫桂焕[1,2] 孙立[2] 孙奉仲[1] 许敏[2] 孙荣峰[2] 田永春 

机构地区：[1]山东大学能源与动力工程学院,济南250061 [2]山东省科学院能源研究所,济南250014 [3]山东省生物质气化技术重点实验室,济南250014

出　　处：《燃烧科学与技术》2010年第4期358-362,共5页Journal of Combustion Science and Technology

基　　金：国家科技支撑计划资助项目(2006BAD07A0302);国家高技术研究发展计划(863)资助项目(2009AA05Z214);山东省自主创新重大基金项目:专项资助项目(2006GG1107010)

摘　　要：研究了玉米秸和稻壳热解产物在不同反应温度和停留时间下的分布规律.试验结果表明,400℃时热解产物中液体质量分数接近50%;随着反应温度升高,大分子的碳氢化合物逐步裂解,气态产物逐渐增多,800℃时气体产物质量分数超过了55%.反应温度对热解产物的分布具有显著影响,而停留时间影响较小.随着反应温度升高,H2含量明显增加,CO和CO2含量明显降低,CH4含量受温度的影响较小.当反应温度在400~500℃时,热解气体的低位热值在11～15 MJ/m3;反应温度超过500℃时,气体热值在15～16.5 MJ/m3.Distribution properties of pyrolysis products of corn stalk and rice husks under different reaction temperature and residence time were studied. The experiments prove that the mass ratio of liquid products was nearly 50% at 400 ℃. With the increase of reaction temperature, hydrocarbons further crack into small-molecule gases, and the ratio of permanent gases was above 55% at 800 ℃. The results show that the reaction temperature which is closely related to the compositions of per- manent gases has a greater influence on pyrolysis products than residence time. With the increase of reaction temperature, the volume content of H2 rises sharply, while those of CO and CO2 both decrease obviously. Meanwhile, the volume content of CH4 increases slightly, especially when the temperature is lower than 500 ℃. And the highest volume content of light hydrocarbons achieves at about 500 ℃. As reaction temperature rises from 400 ℃ to 500 ℃, the low heat value （LHV） of permanent gases increases from 11 MJ/m3 to 15 MJ/m3. When the temperature exceeds 500 ℃, the LHV of per- manent gases changes gently within the range of 15-16.5 MJ/m3.

关 键 词：热解 反应温度 停留时间 低位热值 

分 类 号：TK6[动力工程及工程热物理—生物能]