A Review of the Morphological Regulation of γ⁃Al2O3 Spport and Its Effect on Propane Dehydrogenation Catalysts

doi:10.12422/j.issn.1006-396X.2024.02.005

Abstract

Abstract:

γ-Al₂O₃ is commonly used as a carrier for catalysts, and the physicochemical properties of its surface greatly influence the catalytic reaction. The exposed Al coordination environment can be regulated by adjusting the morphology of γ-Al₂O₃ carriers by changing the synthesis method and synthesis conditions. The energy of the exposed crystal lattice of carriers with different morphologies is different, which will directly affect the acidity of the carrier and the interaction between active metals, and active metals and carriers, thus creating different loading sites of active metals. Carrier morphology control is an effective way to regulate the structure of the active components. The regulation of the support morphology of the propane dehydrogenation catalyst will affect the catalytic performance. The research progress of γ-Al₂O₃ support was reviewed from the aspects of preparation method, morphology control, and its influence on propane dehydrogenation catalyst.

Key words: Aluminum oxide, Carrier morphology, Active site, Propane dehydrogenation, Catalyst

摘要：

γ-Al₂O₃为催化剂常用的载体，其表面物化性质对催化反应影响较大。通过改变合成方法和条件，可调控γ-Al₂O₃的载体形貌及载体表面Al的配位环境。不同形貌的载体暴露晶面所需能量不同，其直接影响载体的表面酸性，并影响活性金属之间以及活性金属与载体之间的相互作用，从而创造活性金属不同的锚位点，因此控制载体形貌是调控活性组分结构的有效方式。丙烷脱氢催化剂的载体形貌影响催化剂的催化性能。从γ-Al₂O₃载体的制备方法、形貌控制及其对丙烷脱氢催化剂的影响等几个方面，综述了相关领域的研究进展。

关键词: 氧化铝, 载体形貌, 活性位构筑, 丙烷脱氢, 催化剂

CLC Number:

TQ221.212

Shijia LIU, Kai HE, Yanfeng BI, Lijuan SONG. A Review of the Morphological Regulation of γ⁃Al₂O₃ Spport and Its Effect on Propane Dehydrogenation Catalysts[J]. Journal of Petrochemical Universities, 2024, 37(2): 31-41.

刘世佳, 何凯, 毕研峰, 宋丽娟. γ⁃Al₂O₃载体的形貌调控及其对丙烷脱氢催化剂的影响综述[J]. 石油化工高等学校学报, 2024, 37(2): 31-41.

Figures/Tables 6

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载体形貌	催化剂	反应条件			反应效果		文献
载体形貌	催化剂	温度/℃	质量空速/h^-1	进料	C₃H₈ 转化率/%	C₃H₆ 选择性/%	文献
纳米片	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	31.0	81.0	[41]
纳米纤维	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	37.0	80.0	[41]
纳米板	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	41.0	70.0	[41]
片状	PtSn/γ⁃Al₂O₃	590	9.40	C₃H₈(16.2 kPa)+H₂(20.3 kPa)+N₂	48.7	99.1	[42]
块状	Pt⁃Sn₂/γ⁃Al₂O₃	570	2.90	n(C₃H₈)∶n(H₂)=1∶1，N₂流量为50 mL/min	47.0	-	[45]
片状	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	52.9	98.0	[40]
棒状	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	56.6	96.2	[40]
长棒	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	45.9	98.5	[40]
杨桃状	PtSn/γ⁃Al₂O₃	600	20 000 mL/（h·g）	n(C₃H₈)/n(H₂)=1∶3	22.0	80.0	[62]
块状	Pt⁃Sn/γ⁃Al₂O₃	600	3.20	C₃H₈	35.6	88.5	[72]
棒状	CrO _x ⁃K/γ⁃Al₂O₃	600	-	C₃H₈	33.2	90.4	[73]
球状	Pt/Sn₁₀⁃γ⁃Al₂O₃	610	-	n(C₃H₈)/n(H₂)=2∶1	35.0	93.5	[74]

载体形貌	催化剂	反应条件			反应效果		文献
载体形貌	催化剂	温度/℃	质量空速/h^-1	进料	C₃H₈ 转化率/%	C₃H₆ 选择性/%	文献
纳米片	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	31.0	81.0	[41]
纳米纤维	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	37.0	80.0	[41]
纳米板	Co/γ⁃Al₂O₃	600	3.30	n(C₃H₈)/n(H₂)=4∶1	41.0	70.0	[41]
片状	PtSn/γ⁃Al₂O₃	590	9.40	C₃H₈(16.2 kPa)+H₂(20.3 kPa)+N₂	48.7	99.1	[42]
块状	Pt⁃Sn₂/γ⁃Al₂O₃	570	2.90	n(C₃H₈)∶n(H₂)=1∶1，N₂流量为50 mL/min	47.0	-	[45]
片状	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	52.9	98.0	[40]
棒状	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	56.6	96.2	[40]
长棒	PtSn/γ⁃Al₂O₃	590	2.35	n(C₃H₈)/n(N₂)=1∶2	45.9	98.5	[40]
杨桃状	PtSn/γ⁃Al₂O₃	600	20 000 mL/（h·g）	n(C₃H₈)/n(H₂)=1∶3	22.0	80.0	[62]
块状	Pt⁃Sn/γ⁃Al₂O₃	600	3.20	C₃H₈	35.6	88.5	[72]
棒状	CrO _x ⁃K/γ⁃Al₂O₃	600	-	C₃H₈	33.2	90.4	[73]
球状	Pt/Sn₁₀⁃γ⁃Al₂O₃	610	-	n(C₃H₈)/n(H₂)=2∶1	35.0	93.5	[74]

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A Review of the Morphological Regulation of γ⁃Al₂O₃ Spport and Its Effect on Propane Dehydrogenation Catalysts

γ⁃Al₂O₃载体的形貌调控及其对丙烷脱氢催化剂的影响综述

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