文献类型：期刊文献

中文题名：Ni基催化剂在甲烷水蒸气重整中的抗积碳研究

英文题名：Study on carbon deposition resistance of coated Ni-based catalyst in steam reforming of methane

作者：高鑫华[1];沈卫华[1];方云进[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

年份：2022

卷号：42

期号：3

起止页码：114

中文期刊名：现代化工

外文期刊名：Modern Chemical Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金项目(21576083)。

语种：中文

中文关键词：镁铝尖晶石;甲烷重整;Ni基催化剂;SiO_(2)包覆层;抗积碳

外文关键词：magnesia-alumina spinel;methane reforming;Ni-based catalyst;SiO_(2) coating layer;resistant to carbon deposition

摘要：采用等体积浸渍法制备镁铝尖晶石结构载体的Ni基催化剂,通过浸渍水解不同质量分数的(3-氨丙基)三乙氧基硅烷制备具有SiO_(2)包覆层的Ni基催化剂,并加入La助剂,对比SiO_(2)包覆层及添加La助剂对催化剂性能的影响。利用XRD、N_(2)-物理吸附、H_(2)-TPR、TEM、TG等技术对催化剂进行表征。结果表明,SiO_(2)包覆层可以有效阻止高温条件下催化剂表面积碳的生成,在温度为750℃、n(H_(2)O)/n(CH_(4))=1.0的严苛条件下,相较未进行包覆处理的催化剂,添加La助剂的10%SiO_(2)包覆催化剂积碳速率降低90%以上。
Ni-based catalysts with magnesia-alumina spinel structural support are prepared via incipient wetness impregnation method,and then coated with silica through impregnation and hydrolysis of(3-aminopropyl)triethoxysilane with different contents to obtain silica coated Ni-based catalysts.La is added in the coated catalysts to improve the stability of silica layer.The effects of silica coating and La additive on the performance of the catalysts are compared.The catalysts are characterized by XRD,N_(2)-physical adsorption,H_(2)-TPR,TEM and TG.Experimental results show that silica coating layer can effectively prevent the formation of carbon on the surface of the catalyst at high temperature.Under the harsh conditions of 75℃and n(H_(2)O):n(CH_(4))=1.0,the carbon deposition rate of the 10%SiO_(2) coated catalyst with La additive is reduced by more than 90%compared with that of the uncoated catalyst.