矿物质对玉米秸秆热解及动力学特性的影响  

INFLUENCE OF MINERAL METTERS UPON PYROLYSIS BEHAVIOR AND DYNAMIC PROPERTIES OF CORN STALKS

作　　者：刘耀鑫[1] 陈炜[2] 卢红伟[1] 

机构地区：[1]沈阳航空航天大学辽宁省清洁能源重点实验室,辽宁沈阳110136 [2]沈阳工业大学基础教育学院,辽宁沈阳110178

出　　处：《热力发电》2012年第1期37-41,共5页Thermal Power Generation

基　　金：辽宁省教育厅项目(2008S173)

摘　　要：以玉米秸秆为研究对象,采用热重分析仪对经预处理和添加催化剂(DHC-32、Na2CO3、CaO、ZnO、CaCO3)的试样进行热解试验,考察了矿物质对原样、脱灰试样热解特性的影响,并采用一级反应对其相应热解动力学进行了计算分析。结果表明,脱灰生物质和加入催化剂的原样及水洗试样热解焦炭产率增加,而催化剂降低了酸洗玉米秸秆焦炭产率;经过预处理的玉米秸秆热解活化能大于原样活化能;与未添加催化剂试样相比,除了加入CaCO3的玉米秸秆热解活化能略有升高外,其它添加催化剂试样的热解活化能均有一定程度降低。Taking corn stalks as object of study, by adopting thermogravimetric analyser,a pyrolysis test of samples after pretreatment and adding catalysis （DHC - 32, Na2CO3, CaO, ZnO, and CaCO3 ） has been carried out,the influence of mineral metters upon pyrolysis behavior of raw and pretreated sam- ples being observed, and the corresponding dynamic properties of pyrolysis being calculated and ana- lysed by using the first order reaction. Results shows that the char yield rate in pyrolysis of deashed bio- mass and catalyst- added raw and water- washed samples has increased, however, the catalysis make the char yield rate of acid -washed corn stalks to be reduced;the activation energy in pyrolysis of pretreated corn stalks is greater than that of raw samples;compared with samples,in which the cata- lysts haven＇t added, excepting the activation energy in pyrolysis of corn stalks,in whieh CaCO3 is add- ed, has slightly heigtened, the activation energy in pyrolysis of samples,in which other catalyst is add- ed, all have reduced in certain degree.

关 键 词：玉米秸秆 矿物质 催化剂 热解特性 动力学特性 焦炭产率 

分 类 号：TK16[动力工程及工程热物理—热能工程]