CuO/ZnO/Al2O3 Catalyst Prepared by Mechanical-Force-Driven Solid-State Ion Exchange and Its Excellent Catalytic Activity under Internal Cooling Condition
CuO/ZnO/Al2O3 Catalyst Prepared by Mechanical-Force-Driven Solid-State Ion Exchange and Its Excellent Catalytic Activity under Internal Cooling Condition
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机械力驱动固态离子交换制备CuO/ZnO/Al2O3催化剂及其内冷条件下优异的催化活性
DOI：
10.1021/acs.iecr.7b01464
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发表时间：
2017-07
影响因子：
4.2
通讯作者：
Fang Fang
中科院分区：
文献类型：
--
作者：
Wu Wangyang;Xie Kai;Sun Dalin;Li Xiaohong;Fang Fang
采用机械力驱动的固态离子交换法制备了 CuO/ZnO/Al2O3 催化剂，并在带有内冷却系统的自制反应器中研究了其对甲醇合成的催化性能。随着球磨过程中球磨速度的增加，催化剂前驱体中Cu2+和Zn2+之间的离子交换增强。煅烧后，CuO纳米颗粒与ZnO纳米颗粒相邻，ZnO纳米颗粒充当间隔物，防止CuO纳米颗粒团聚，导致催化剂中CuO和ZnO交叉分布。所制备的催化剂表现出优异的催化活性，在240℃和4MPa下CO2转化率和CH3OH产率最高分别可达59.5%和43.7%。非凡的催化性能可归因于固态离子交换引起的 CuO 和 ZnO 纳米粒子的交叉分布以及内部冷却促进可逆 CO2 加氢反应至甲醇合成的作用。
CuO/ZnO/Al2O3 catalysts were prepared by a mechanical-force-driven solid-state ion-exchange method, and their catalytic performance for methanol synthesis was investigated in a manufactured reactor with an internal cooling system. With the increasing of milling speed during ball-milling, the ion exchange between Cu2+ and Zn2+ in catalyst precursors is enhanced. After calcination, CuO nanoparticles are neighboring to ZnO nanoparticles and ZnO nanoparticles serve as spacers to prevent the agglomeration of CuO nanoparticles, leading to a cross-distribution of CuO and ZnO in catalysts. The as-prepared catalysts exhibit excellent catalytic activities, and the highest CO2 conversion and CH3OH yield at 240 °C and 4 MPa can reach 59.5% and 43.7%, respectively. The extraordinary catalytic performance can be attributed to both the cross-distribution of CuO and ZnO nanoparticles caused by solid-state ion exchange and the promotion of reversible CO2 hydrogenation reaction toward methanol synthesis by the internal coo...
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