RuNi双活性组分负载型TiO_(2)催化CO_(2)甲烷化反应研究  

RuNi dual active components supported TiO catalyst for CO methanation

作　　者：郭艳 许传芝[1] 王嘉 牛建中[1] 郭佳星 王新承 GUO Yan;XU Chuan-zhi;WANG Jia;NIU Jian-zhong;GUO Jia-xing;WANG Xin-cheng(State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,甘肃兰州730000 [2]北京石油化工学院化学工程学院,北京102617

出　　处：《现代化工》2021年第6期110-113,118,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21908009);北京市自然科学基金(2184101)。

摘　　要：采用共沉淀法制备了一种RuNi双金属负载型催化剂(RuNi/TiO_(2)),通过XRD、BET、TEM及H2-TPR表征确定了催化剂的组成及还原性质。考察了RuNi/TiO_(2)催化剂对CO_(2)甲烷化反应活性的影响,并对反应温度、RuNi负载量等反应条件进行了优化。结果表明,相较Ru或Ni单组分负载的TiO_(2)催化剂,双金属负载显著提高了其催化活性,CO_(2)转化率达到了80%以上,甲烷选择性接近100%,且RuNi/TiO_(2)催化时反应速率达到了0.55 mol CO_(2)/(g Ru)·h。同时,通过原位傅里叶红外光谱探究了以H2O为还原剂时紫外光照射条件下CO_(2)甲烷化反应机制。RuNi bimetallic supported catalyst(RuNi/TiO_(2))is prepared by co-precipitation method.The composition and reduction properties of the catalyst are determined by XRD,BET,TEM and H2-TPR characterizations,and the catalytic activity of RuNi/TiO_(2)catalyst for CO_(2)methanation is investigated.Results show that the bimetallic supported catalyst shows a significant higher catalytic activity than Ruor Ni single-component supported TiO_(2)catalyst.CO_(2)conversion rate over RuNi/TiO_(2)catalyst exceeds 80%,methane selection closes to 100%,and the reaction speed reaches0.55 mol CO_(2)(g Ru)-1·h-1.Reaction temperature,RuNi loading amount and other reaction conditions are also optimized.Furthermore,the mechanism of CO_(2)methanation under UV irradiation with H2O as the reducing agent is explored through in-situ Fourier infrared spectroscopy.

关 键 词：RuNi/TiO_(2) CO_(2)甲烷化 光催化 

分 类 号：O643[理学—物理化学]