Catalytic pyrolysis behavior of heavy crude oil over acid-base composite catalysts

From bench to industry, the application of all-inorganic solid base materials in traditional heterogeneous catalysis: a mini review

“…Compared with the general FCC catalysts with ZSM-5 and Y-type zeolites as the main active components, these combinations can better balance the shape selectivity, cracking and hydrogen transfer activities of the catalysts, and thus obtain relatively high low-carbon olefin and aromatic yields. 15 …”

“…3,4,10,11 To date, there are several excellent reviews summarizing the application of solid bases in rening or non-rening elds. 1,3,[12][13][14][15][16][17][18][19][20] According to the analysis of the references in the literature, to date, the catalytic mechanism for base-catalyzed processes has not been explained in detail, and the structureactivity relationships between the physical and chemical properties of these catalysts and reactions have not been well established. Therefore, a systematic study on the mechanism of solid base catalysis is required to establish the structure-activity relationships between catalytic properties and physical and chemical properties of catalysts, which will be more helpful for the in-depth understanding and application improvement of solid bases.…”

Research Progress of Basic Catalyst Used in Catalytic Cracking for Olefin Production and Heavy Oil Utilization

“…Niwamanya et al (2022) 54 carried out research to clarify the catalytic performance of heavy crude oil pyrolysis over different catalysts at 600 °C. It was concluded that catalytic pyrolysis of heavy crude oil over calcium aluminate achieved a maximum alkene yield of 36.89% for the dehydrogenation, while the highest aromatics of 57% was obtained over ZSM-5 due to the high acidity.…”

A lost piece of the puzzle of the alkane cracking mechanism: a carbanion pathway on a solid base catalyst

“…Niwamanya et al presumed that the strong basicity of calcium aluminate could promote the dehydrogenation of hydrocarbon molecules, thereby raising the yield of light olefins, compared to silica sand. 30 In addition, Tian et al further studied the performance of a calcium aluminate (CaAl) catalyst in catalytic cracking reactions. It was suggested that the catalyst promoted the generation of free radicals by hydrogen abstraction of the reactants and thus improved the yield of light olefins.…”