过渡金属催化剂及热解条件对新疆吉木萨尔油页岩热解的影响

Influence of Transition Metal Salt and Pyrolysis Condition on the Product Yield via Jimsar Oil Shale Pyrolysis

采用过渡金属盐:Fe_2O_3、CoCl_2·6H_2O和MnSO_4·H_2O作为催化剂对新疆吉木萨尔地区油页岩进行催化热解。首先,对添加了不同类型催化剂的油页岩进行TG实验,结果表明这几种催化剂中CoCl_2·6H_2O催化效果最好;在此基础上,对添加了CoCl_2·6H_2O的样品进一步做TG-MS实验分析,结果显示,添加CoCl_2·6H_2O后热解的初始温度降低约100℃,同时热解温度范围从435～1000℃缩小至330～650℃。催化热解过程中,产量最高的产物为CO/C_2H_4和C_3H_4,我们认为,CO/C_2H_4中大部分应为C_2H_4。随着升温速率的提高,烯烃和炔烃产量增加,H_2O、烷烃以及芳香烃产量降低,CO/C_2H_4、H_2S、乙烷、丙烯、CO_2/丙烷产量基本保持不变。从分析结果可以得出:以CoCl_2·6H_2O作为催化剂,对于吉木萨尔油页岩来讲,最佳的升温速率为5℃/min。

Transition metal salts:Fe2O3,CoCl2·6H2O and MnSO4·H2O were chosen to be the catalysts for Jimsar oil shale pyrolysis.The pyrolysis behaviors of samples with different catalysts were compared by using TG analyzer firstly,the best catalytic pyrolysis process was further analyzed by TGMS.Compared to Fe2O3 and MnSO4·H2O,CoCl2·6H2O has the best catalytic effect for Jimsar oil shale.With CoCl2·6H2O,the initial reaction temperature of pyrolysis process is reduced about 100℃,and the temperature range is reduced from 435-1000℃to 330-650℃.The two most productive products are CO/ethene and propyne,and we think most of the CO/ethene should be ethene.With increasing heating rate,the outputs of alkene and alkyne is increased,the outputs of H2O,methane,alkane and aromatic hydrocarbons are decreased,and the outputs of CO/ethene,H2S,ethane,propene and CO2/propane have little change.From the results and analysis,it can be concluded that,taking CoCl2·6H2O as catalyst,the best heating rate should be 5℃/min for Jimsar oil shale.