Propane dehydrogenation over core–shell structured Al2O3@Al via hydrothermal oxidation synthesis. (15th March 2022)

• Record Type: Journal Article
• Authors: Zhang, Huanling; Zhang, Kai; Wang, Guowei; Tang, Ning; Zhu, Xiaolin; Li, Chunyi; Shan, Honghong
• Is Part Of: Fuel. Volume 312(2022)
• Publication Date: 2022-03-15
• Subjects: Propane dehydrogenation -- Propene -- Al2O3@Al catalyst -- Hydrothermal oxidation -- Induction period; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2021.122756
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: A core–shell structured Al2 O3 @Al catalyst is synthesized via hydrothermal oxidation. The catalyst exhibits a dramatic enhancement in dehydrogenation performance. The induction period can be shortened by decreasing the hydrothermal time. The introduction of Na further increases the selectivity to propene. Abstract: A novel dehydrogenation catalyst, core–shell structured Al2 O3 @Al via hydrothermal oxidation synthesis, demonstrates good catalytic performance for propane dehydrogenation. According to the characterization results, the hydration of metallic Al powder results in the appearance of nanosheet-like AlOOH and Al(OH)3 species on the surface, which are regarded as the precursor of the active sites responsible for propane dehydrogenation. Compared with traditional γ-Al2 O3 sample, the novel Al2 O3 @Al catalyst with more coordinatively unsaturated Al 3+ leads to enhanced formation rate of propene and shortened induction period, which can be attributed to the high density of corner and edge sites on the surface of lamella-like AlOOH and/or Al(OH)3 species. More importantly, a significantly increased selectivity to propene can also be achieved, especially by introducing Na.