| 宋燕,孟凡会,李忠.柠檬酸凝胶法合成Ni-ZrO2催化剂及其低温浆态床甲烷化性能研究[J].分子催化,2016,30(3):243-252 |
| 柠檬酸凝胶法合成Ni-ZrO2催化剂及其低温浆态床甲烷化性能研究 |
| Ni-ZrO2 Catalysts Prepared by Citric–gel Method for Low-temperature Slurry Phase Methanation of Carbon Monoxide |
| 投稿时间：2016-04-02 修订日期：2016-05-16 |
| DOI： |
| 中文关键词: 浆态床反应器，CO甲烷化，Ni-ZrO2催化剂，焙烧温度 |
| 英文关键词:slurry-bed reactor, CO methanation, Ni-ZrO2 catalyst, calcination temperature |
| 基金项目:国家重点基础研究发展计划（973计划） |
|
| 摘要点击次数: 1479 |
| 全文下载次数: 2056 |
| 中文摘要: |
| 采用柠檬酸凝胶法制备不同温度焙烧的Ni-ZrO2催化剂，考察了催化剂的表面性质和结构对低温浆态床CO甲烷化性能的影响。结果表明，随着焙烧温度的升高，催化剂的比表面积和孔容逐渐减小，金属Ni分散度先增加后减小，Ni晶粒先减小后增大。450 癈焙烧的Ni-ZrO2催化剂金属Ni分散度最高、与载体ZrO2的相互作用最强、对反应物CO分子的吸附作用适中，在260 癈、1.0 MPa和H2/CO摩尔比为3的条件下，CO转化率达到61.6%，且在考察的反应时间内未出现明显失活。 |
| 英文摘要: |
| A series of Ni-ZrO2 catalysts calcined at different temperatures were prepared by the citric–gel method. The effect of physiochemical properties and structures on catalytic activity of Ni-ZrO2 catalysts for low-temperature CO methanation in a slurry-bed reactor was studied. As the calcination temperature rose, the BET specific surface area and pore volume decreased, the metal Ni dispersion firstly increased and then decreased, while the Ni particle size firstly decreased and then increased. Ni-ZrO2 catalyst calcinated at 450 癈 showed the highest Ni dispersion, smallest Ni crystallite size, strongest interaction between Ni species and support, and largest amount of CO desorption which moderate interacted with metallic Ni. Under the conditions of 260 癈, 1.0 MPa and H2/CO molar ratiao of 3, Ni-ZrO2 catalyst showed the highest CO conversion of 61.6% and no obvious deactivation during the investigated reaction time. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
