封装型丙烷脱氢催化剂的研究进展

doi:10.19964/j.issn.1006-4990.2024-0190

Abstract

Abstract:

Propane dehydrogenation（PDH） to propylene is an important technological pathway for increasing the production of the vital chemical propylene.The PDH reaction，being a structure-insensitive process，requires only a single metal or metal-oxygen site for C—H activation to occur.However，the competing C—C activation reaction requires aggregation state metal or oxide sites to take place.Therefore，the development strategy of PDH catalysts often involves constructing sub-nanometer dehydrogenation active centers through confinement effects or strong metal-support interactions.In recent years，utilizing the confinement effect of zeolite channels to construct stable sub-nanometer-sized active sites has become a research hotspot in PDH field.The metal species encapsulated in zeolites were firstly systematically classified，synthesis strategies were introduced，and qualitative and quantitative methods for characterizing the entry of metal species into the micropores of zeolites were discussed.Then，the latest synthetic research progress of zeolite-encapsulated metal catalysts was summarized，including precious and non-precious metal catalysts for propane dehydrogenation reaction.Meanwhile，catalytic mechanisms and structure-function relationships were also discussed.Finally，the limitations and future development directions of zeolite-encapsulated metal catalysts in the propane dehydrogenation process were proposed to provide new insights for the preparation of metal-loaded zeolite propane dehydrogenation catalysts.

Key words: propane dehydrogenation, zeolite, encapsulation, confinement effect, noble metal, non-noble metal

CLC Number:

TQ426.6

WANG Yansu, FENG Qing, LIU Guozhu, YU Haibin, SUN Yanmin, NAN Jun. Advances in encapsulated catalysts for propane dehydrogenation[J]. Inorganic Chemicals Industry, 2024, 56(11): 95-104.

Figures/Tables 10

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催化剂	反应温度/℃	反应空速/h^-1	丙烷初始转化率/%	丙烯选择性/%	失活速率K_d/h^-1
0.36%Pt0.68% Sn/Al₂O₃-sheet^［3］	590	9.4	48.7~44.6	98.7	0.007
0.3Pt0.5Zn@S-1^［9］	550	6.5	45~42	99.0~99.9	0.002
0.3Pt0.5Zn@S-1^［9］	525	1	62~61	99.0~99.9	0.001 5
0.3Pt0.5Zn@S-1^［9］	550	1	69~66	98.0~99.9	0.007
1.5Ga0.1Pt@S-1^［21］	600	0.65	45.9~41.5	92~95	0.006 8
1.5Ga@S-1^［21］	600	0.65	16~9	79~83	0.027
PtSn@S-1^［22］	550	3.6	45	99
0.04Pt-0.36Zn-DeAlBEA^［26］	550	7 390	32	99
Pt₄-Ge₂-d₄r@UTL^［27］	500	0.75	54	99

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Advances in encapsulated catalysts for propane dehydrogenation

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