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Effect of Al-containing precursors on Cu/ZnO/Al 2 O 3 catalyst for methanol production
Fuel Processing Technology ( IF 7.5 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.fuproc.2018.04.021
Fan Zhang , Yuan Liu , Xiaoying Xu , Panpan Yang , Ping Miao , Yulong Zhang , Qi Sun

Abstract Aluminum is an essential ingredient in the ternary Cu/ZnO/Al2O3 catalyst for methanol synthesis from syngas. This work investigated the effect of Al-containing precursors on Cu/ZnO/Al2O3 catalysts during catalyst preparation. A series of Cu0.6Zn0.3Al0.1 catalysts with various Al-containing precursors, including Cu-Zn-Al hydrotalcite, aluminum hydroxide and Zn-Al hydrotalcite, were prepared by co-precipitation and fractional-precipitation, respectively. The catalysts were characterized with XRD, TG, XRF, N2 physisorption, N2O chemisorption, SEM, TEM/EDS and TPR. Results show that the Al-containing precursor has an important effect on the Cu substitution by Zn in malachite lattice, leading to various performances of the obtained catalysts. The catalyst with Al existing as aluminum hydroxide performed high Cu substitution in the co-precipitated zinc malachite, and exhibits better catalyst performance compared to its counterparts. Aluminum hydroxide can be a suitable Al-containing precursor for preparing the Cu/Zn/Al methanol-synthesis catalyst.

中文翻译:

含铝前驱体对制备甲醇的Cu/ZnO/Al 2 O 3 催化剂的影响

摘要 铝是合成气合成甲醇的三元 Cu/ZnO/Al2O3 催化剂的重要成分。这项工作研究了在催化剂制备过程中含铝前驱体对 Cu/ZnO/Al2O3 催化剂的影响。分别采用共沉淀法和分级沉淀法制备了一系列含有各种含铝前驱体的Cu0.6Zn0.3Al0.1催化剂,包括Cu-Zn-Al水滑石、氢氧化铝和Zn-Al水滑石。用XRD、TG、XRF、N2物理吸附、N2O化学吸附、SEM、TEM/EDS和TPR对催化剂进行了表征。结果表明,含铝前驱体对孔雀石晶格中铜对锌的取代有重要影响,导致所得催化剂的各种性能。Al 以氢氧化铝形式存在的催化剂在共沉淀的孔雀石锌中表现出较高的 Cu 取代率,并且与其对应物相比表现出更好的催化剂性能。氢氧化铝可以是用于制备Cu/Zn/Al甲醇合成催化剂的合适的含Al前体。
更新日期:2018-09-01
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