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The effect of support on RhFe/Al2O3 for ethanol synthesis via CO hydrogenation
Applied Petrochemical Research Pub Date : 2021-07-21 , DOI: 10.1007/s13203-021-00277-9
Fang Li 1 , Weixing Qian 2
Affiliation  

Different alumina samples prepared with sol–gel, chemical precipitation and hydrothermal synthesis were used as supports of Fe-promoted Rh-based catalysts for ethanol synthesis via CO hydrogenation. The samples were characterized by means of N2-adsorpotion, XRD, H2-TPR, XPS, STEM, H2-TPD, DRIFTS, H2 and CO chemisorption. The results indicated that the Al2O3 prepared by hydrothermal synthesis exhibited nano-fiber morphology and constituted of mixed crystal phases, while Al2O3 prepared by sol–gel and chemical precipitation shows no changes of morphology and crystal phases compared with the commercial Al2O3. In addition, nano-fiber Al2O3-supported Rh-based catalyst shows higher ethanol selectivity, which is ascribed to the lower metal–support interaction, higher dispersion and stronger CO insertion ability.



中文翻译:

载体对RhFe/Al2O3 CO加氢合成乙醇的影响

采用溶胶-凝胶法、化学沉淀法和水热合成法制备的不同氧化铝样品作为Fe助剂Rh基催化剂的载体,用于CO加氢合成乙醇。通过N 2 -吸附、XRD、H 2 -TPR、XPS、STEM、H 2 -TPD、DRIFTS、H 2和CO化学吸附对样品进行表征。结果表明,水热合成法制备的Al 2 O 3呈现纳米纤维形貌,由混合晶相组成,而溶胶-凝胶法和化学沉淀法制备的Al 2 O 3与商业化制备的Al 2 O 3 相比,形貌和晶相没有变化。 Al 2 O 3。此外,纳米纤维Al 2 O 3负载的Rh基催化剂表现出更高的乙醇选择性,这归因于较低的金属-载体相互作用、更高的分散性和更强的CO插入能力。

更新日期:2021-07-21
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