文献类型：期刊文献

中文题名：Cs、In掺杂Ni/MgAl(O)催化剂的甲烷二氧化碳干重整反应抗积炭性能研究

英文题名：Study on coke resistance performances of Cs,In doped Ni/MgAl(O)catalysts in dry reforming reaction of methane and carbon dioxide

作者：袁亨源[1,2];王昊[3];刘小梁[2];陈伟[2];刘志成[2];朱卡克[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237;[2]中石化(上海)石油化工研究院绿色化工与工业催化国家重点实验室,上海201208;[3]中石化齐鲁分公司研究院,山东淄博255400

年份：2025

卷号：50

期号：12

起止页码：11

中文期刊名：低碳化学与化工

外文期刊名：Low-Carbon Chemistry and Chemical Engineering

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金(22250005,U1663221);中国石油化工股份有限公司资助项目(222215)。

语种：中文

中文关键词：干重整反应;Ni基催化剂;抗积炭性能;Mg-Al尖晶石;Cs、In掺杂

外文关键词：dry reforming reaction;Ni-based catalysts;coke resistance performances;Mg-Al spinel;Cs,In doping

摘要：甲烷二氧化碳干重整(DRM)是一种有应用前景的“碳中和”工业催化过程,但该过程存在催化剂易积炭失活的问题。目前针对DRM催化剂的研究主要集中在对活性金属的单因素调控,而对载体和活性金属协同调控的研究相对较少。以Ni/MgAl_(2)O_(4)催化剂为基础,采用共沉淀法制备了一系列Ni质量分数均为2%的Ni基催化剂及Cs、In掺杂Ni基催化剂。结合XRD、H_(2)-TPR和CO_(2)-TPD等多种表征方法,研究了n(MgO):n(Al_(2)O_(3))及Cs、In掺杂对催化剂结构和DRM反应催化性能的影响,并分析了催化剂的抗积炭机理。结果表明,在温度为1073 K、压力为0.1 MPa、V(CO_(2)):V(CH_(4))为1:1和空速为72000 mL/(g·h)的条件下反应120 h,n(Cs):n(In):n(Ni)=1:1:5、n(MgO):n(Al_(2)O_(3))=3:1的催化剂(Cs_(0.2)In_(0.2)-Ni/MAN-3)表现出最优的催化性能及抗积炭性能,其CH_(4)转化率和CO_(2)转化率分别为76.3%和79.5%,TG失重(质量分数)为2.0%。
Dry reforming of methane and carbon dioxide(DRM)is a promising“carbon-neutral”industrial catalytic process.However,the process suffers from the problem of catalyst deactivation due to coke deposition.Current researches on DRM catalysts primarily focus on single-factor regulation of active metals,while studies on the synergistic regulation between supports and active metals remain relatively limited.Based on the Ni/MgAl_(2)O_(4) catalyst,a series of Ni-based catalysts and Cs,In doped Ni-based catalysts with the constant Ni mass fraction of 2%were prepared by co-precipitation method.Combining with various characterization techniques such as XRD,H_(2)-TPR,and CO_(2)-TPD,the effects of n(MgO):n(Al_(2)O_(3))as well as Cs,In doping on catalyst structures and DRM catalytic performances were investigated,and the anti-coking mechanism of catalysts was analyzed.The results indicate that after reaction for 120 h under the conditions of temperature of 1073 K,pressure of 0.1 MPa,V(CO_(2)):V(CH_(4))of 1:1 and space velocity of 72000 mL/(g·h),the catalyst with n(Cs):n(In):n(Ni)of 1:1:5 and n(MgO):n(Al_(2)O_(3))of 3:1(Cs_(0.2)In_(0.2)-Ni/MAN-3)exhibits optimal catalytic and coke resistance performances,while its CH_(4) conversion rate and CO_(2)conversion rate are 76.3%and 79.5%,respectively,and the TG weight loss(mass fraction)is 2.0%.