| 王金鼎,张金玉,李天宇,孙锟,刘蝈蝈,张雅静,王康军.共沉淀法Ni/Al2O3中镍含量对2-甲基呋喃加氢催化性能的影响[J].分子催化,2025,39(3):252-262 |
| 共沉淀法Ni/Al2O3中镍含量对2-甲基呋喃加氢催化性能的影响 |
| Effect of Ni Content in Ni/Al2O3 Catalysts Prepared by Co-precipitation on the Performance of 2-Methylfuran Hydrogenation |
| 投稿时间：2025-03-20 修订日期：2025-04-28 |
| DOI：10.16084/j.issn1001-3555.2025.03.007 |
| 中文关键词: Ni/Al2O3 共沉淀 气相加氢 2-甲基呋喃 2-甲基四氢呋喃 |
| 英文关键词:Ni/Al2O3 co-precipitation gas phase hydrogenation 2-methylfuran 2-methyltetrahydrofuran |
| 基金项目:辽宁省自然科学基金联合基金(2024-MSLH-379); 沈阳化工大学达标立项项目(LDB2022001) [Liaoning Provincial Department of Science and Technology Joint Fund (2024-MSLH-379); Shenyang University of Chemical Technology Dabiaolixiang Project (LDB2022001)]. |
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| 中文摘要: |
| 以硝酸镍和硝酸铝为前驱体, 碳酸钠为沉淀剂, 采用共沉淀法制备镍含量分别为5%、10% 、15%和20%的Ni/Al2O3催化剂, 采用固定床反应器评价其2-甲基呋喃(2-MF)气相加氢制2-甲基四氢呋喃(2-MTHF)的反应性能. 通过N2吸附-脱附、XRD、TEM和H2-TPR对催化剂结构和还原性能进行了表征, 研究了镍含量对催化剂结构的影响规律, 探索了结构与2-MF加氢性能之间的关系. 结果表明, 随着镍含量的增加, 催化剂镍颗粒尺寸逐渐增大, 金属载体相互作用逐渐减弱. 在90 ℃、2 MPa、n(H2/2-MF)=6.4、空速为2.7 h-1的条件下进行2-MF气相加氢反应, 随着镍含量增加, 反应活性位增多, 2-MF的转化率增加, 2-甲基四氢呋喃(2-MTHF)的选择性逐渐降低, 10%Ni/Al2O3催化剂上2-MTHF的收率最高, 可以达到98.6%. 该催化剂连续运行140 h性能保持稳定, 表现出良好的工业应用前景. |
| 英文摘要: |
| A series of Ni/Al2O3 catalysts with Ni mass contents of 5%, 10%, 15% and 20% were prepared by co-precipitation method, using nickel nitrate and aluminium nitrate as precursors, and sodium carbonate as precipitation agent. The catalytic performances for hydrogenation of 2-methylfuran (2-MF) to 2-methyltetrahydrofuran (2-MTHF) in vapor-phase were investigated in a fixed-bed reactor. N2 adsorption-desorption, XRD, TEM, and H2-TPR were carried out to characterize the structure and reduction property of the catalysts. The investigation revealed relationships between nickel loading and the structure, as well as the influences of structure on catalytic property. The results revealed that the specific areas decreased, Ni particle size increased and the metal-support interaction weakened with increasing Ni content. Under certain reaction conditions (90 °C, 2 MPa, H2/2-MF molar ratio=6.4, WHSV=2.7 h–1), the conversion of 2-MF increased and the selectivity of 2-MTHF decreased with increasing Ni content, due to the increased number of Ni active sites. 10%Ni/Al2O3 catalyst achieved the highest 2-MTHF yield of 98.6% and exhibited better stability over 140 h. The catalyst showed potential application in industry. |
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