文献类型：期刊文献

中文题名：ZrO_2/Al_2O_3复合载体镍基催化剂CO甲烷化反应本征动力学

英文题名：Intrinsic Kinetics of CO Methanation over ZrO_2/Al_2O_3 Supported Ni-Based Catalyst

作者：沈叶婷[1];张海涛[1];房鼎业[1];李涛[1]

机构：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237

年份：2016

卷号：42

期号：4

起止页码：446

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：本征动力学;CO甲烷化;ZrO2/Al2O3载体;镍基催化剂

外文关键词：intrinsic kinetics;CO methanation;ZrO2/Al2O3 carrier;Ni-based catalyst

摘要：采用固定床反应器,研究了复合载体镍基催化剂上的CO甲烷化反应。在温度为250~440℃,压力为0.1~2.5 MPa,原料气配比（nH2/nCO）为1.0~4.5的情况下,考察了操作条件对复合载体镍基催化剂甲烷化反应的影响。实验结果表明：CO转化率、CH4的选择性均随着反应温度、反应压力的升高而增加;当反应温度达到340℃时,CO转化率最高;当nH2/nCO=3.0时,具有较高的CO转化率和CH4的选择性。通过正交法设计实验,测定了甲烷化反应动力学数据。以双曲型动力学方程建立了以各组分逸度表示的CH4和CO2反应动力学模型,并用最大继承法对参数进行估值,获得动力学参数。残差分析及统计检验表明动力学模型是适宜的。
CO methanation reaction over Ni-based complex-support catalyst for synthetic natural gas production was systematically investigated in a fixed-bed reactor.The influence of operating conditions on the methanation reaction was explored at reaction temperature of 250~440 ℃,pressure of 0.1~2.5 MPa and nH2/nCOof 1.0~4.5.The experimental results indicated that the conversion of CO and selectivity of CH4 increased with the increase of reaction temperature and pressure.The highest conversion of CO was achieved at 340℃.When nH2/nCO=3.0,a relatively high conversion of CO and high selectivity of CH4 were obtained.The experimental data of intrinsic kinetics of CO methanantion over Ni-based catalyst were measured by orthogonal experiments.Hyperbolic type kinetic models were developed in terms of the reaction rates of CO2 and CH4in form of the fugacity of the reactants.The parameters of the models were obtained through max inherit optimization.It was proved by residual analysis and statistical test that the kinetic models are reliable and acceptable.