Catalytic cracking of soybean oil by hierarchical zeolite containing mesoporous silica-aluminas using a Curie point pyrolyzer

Ishihara, Atsushi; Kawaraya, Daisuke; Sonthisawate, Thanita; Kimura, Kazuyuki; Hashimoto, Tadanori; Nasu, Hiroyuki

doi:10.1016/j.molcata.2014.10.010

Cited by 38 publications

(34 citation statements)

References 36 publications

(58 reference statements)

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“…7b) and 7c). This optimistic behavior was also found in the catalytic cracking of soybean oil in comparison with that of VGO 35) and the catalytic cracking of VGO and AR 31) . The same plots of yields versus conversions showed different slopes for SBO and VGO 35) where yields of SBO were lower than those of VGO at the same conversion, resulting from significant coke and aromatics formation in the catalytic cracking of SBO.…”

Section: Comparison Of Differences In the Catalyticsupporting

confidence: 61%

“…These findings suggest that adsorption occurred more easily than diffusion with smaller pore size catalysts. Presumably the microporous zeolite structure induces adsorption of the aliphatic structures of cracked soybean oil inside the pores and allows further cracking 31), 35) . Matrices enhance the catalytic activity by providing bigger reaction spaces, dispersing the acid sites of the catalyst, prohibiting coke formation and liberating the products outside the catalyst 14) 17) .…”

Section: Catalytic Cracking Of Soybean Oil Usingmentioning

confidence: 99%

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Catalytic Cracking of Soybean Oil Using Zeolite-containing Microporous and Mesoporous Mixed Catalysts with Curie Point Pyrolyzer

Sontisawate

Nasu

Hashimoto

et al. 2016

J. Jpn. Petrol. Inst.

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Zeolite-containing catalysts with hierarchical structures were prepared by combining microporous zeolites (beta and Y zeolite) with mesoporous matrices (silicas and silica _ aluminas with large mesopores) prepared by the gel skeletal reinforcement method and a binder. Morphology of the prepared catalysts was characterized by X-ray diffraction, nitrogen adsorption-desorption, ammonia adsorption-desorption, and thermogravimetric-differential thermal analysis. Catalytic cracking of soybean oil was performed with these mixed catalysts to observe the effect of the pore size on the catalytic activity and the selectivity of products using the convenient Curie point pyrolyzer. Zeolite-containing mixed catalysts exhibited great improvements in all aspects such as maximum increase of 31 % conversion, about 10 % higher gasoline yields, and maximum decrease of 36 % coke formation in comparison with single zeolite, indicating that the presence of the matrices greatly influenced the catalytic cracking. The yields of gasoline, single branched and multi-branched hydrocarbons increased with higher conversion, indicating that increased conversion was necessary to obtain higher yields of products. In comparison of product yields at the same conversion, Y zeolite-containing catalysts exhibited the higher yields than beta (β) zeolite-containing catalysts, indicating that the larger micropore diameter of Y zeolite in the catalysts induced the increase in the gasoline fraction and promoted the isomerization to produce the bulkier products. The conversion of soybean oil increased with increasing the pore diameter for β series catalysts and the conversions were maximum for MAT (

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Section: Comparison Of Differences In the Catalyticsupporting

confidence: 61%

Section: Catalytic Cracking Of Soybean Oil Usingmentioning

confidence: 99%

Catalytic Cracking of Soybean Oil Using Zeolite-containing Microporous and Mesoporous Mixed Catalysts with Curie Point Pyrolyzer

Sontisawate

Nasu

Hashimoto

et al. 2016

J. Jpn. Petrol. Inst.

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“…Regardless of the knowledge gained on cracking of oil-based feedstocks, catalytic cracking of other bulky feedstocks remains widely investigated particularly over hierarchical zeolites. 233 Thus, it has been applied to many diverse raw materials such as vacuum gas-oil, 306 vegetable oils 307 and polyolefins, as main components of plastic wastes. 308 Zeolites were firstly used in large-scale applications in the 1960s for cracking, which was followed by the breakthrough discovery of high-silica zeolites including the most important ZSM-5 (MFI topology).…”

Section: Industrial Processesmentioning

confidence: 99%

From 3D to 2D zeolite catalytic materials

et al. 2018

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Research activities and recent developments in the area of three-dimensional zeolites and their two-dimensional analogues are reviewed. Zeolites are the most important industrial heterogeneous catalysts with numerous applications. However, they suffer from limited pore sizes not allowing penetration of sterically demanding molecules to their channel systems and to active sites. We briefly highlight here the synthesis, properties and catalytic potential of three-dimensional zeolites followed by a discussion of hierarchical zeolites combining micro- and mesoporosity. The final part is devoted to two-dimensional analogues developed recently. Novel bottom-up and top-down synthetic approaches for two-dimensional zeolites, their properties, and catalytic performances are thoroughly discussed in this review.

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“…Hence, intensified efforts have been focused on development of hierarchical ZSM-5 materials in different forms including mesoporous ZSM-5, nanosized ZSM-5, and composite ZSM-5 because they enable to couple the intrinsic catalytic properties of ZSM-5 with improved diffusion [11][12][13]. Consequently, hierarchical ZSM-5 materials have shown superior catalytic performance compared to their purely microporous counterparts in the catalytic cracking of triglycerides [14][15][16][17][18][19]. However, most of available studies have performed on a single type of hierarchical ZSM-5 materials with the focus on production of fuels, particularly gasoline.…”

Section: Introductionmentioning

confidence: 99%

Designing Hierarchical ZSM-5 Materials for Improved Production of LPG Olefins in the Catalytic Cracking of Triglycerides

Vu¹,

Armbruster

2019

Advances in Materials Science and Engineering

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LPG olefins (propene and butenes) are key building blocks in the petrochemical industry whose demand has been expanding steadily in recent years. The use of FCC (fluid catalytic cracking) units for conversion of triglycerides is a promising option for the future to boost production of LPG olefins. However, a need for innovative cracking catalysts is rising due to the different nature between petroleum and biomass-derived feedstocks. In this study, series of hierarchical ZSM-5 materials, namely, mesoporous ZSM-5, nanosized ZSM-5, and composite ZSM-5 were prepared, aiming to enhance the production of LPG olefins along with transportation fuels. Mesoporous ZSM-5 materials were synthesized by the postsynthetic modifications involving base treatment and subsequent acid washing, whereas nanosized ZSM-5 and composite ZSM-5 were synthesized by the direct-synthetic routes for a comparative purpose. The obtained materials were characterized by XRD, FTIR, N2 sorption, TEM, AAS, ICP-AES, and NH3-TPD, and their catalytic performance was assessed in the cracking of triolein as a representative of triglycerides under FCC conditions. It was found that the subsequent strong acid washing step of alkaline treated ZSM-5 for removal of aluminum debris and external acid sites is needed to improve the catalytic performance. The resulting mesoporous ZSM-5 material shows higher yields of the desired products, i.e., gasoline and LPG olefins than its parent, commercial ZSM-5 at the almost complete conversion (ca. 90 wt.%). The selectivity toward LPG olefins is also enhanced over all the hierarchical ZSM-5 materials, particularly high for composite ZSM-5 (ca. 94 wt.%). The improved diffusion and lowered acidity of the hierarchical ZSM-5 materials might be responsible for their superior catalytic performance.

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Catalytic cracking of soybean oil by hierarchical zeolite containing mesoporous silica-aluminas using a Curie point pyrolyzer

Cited by 38 publications

References 36 publications

Catalytic Cracking of Soybean Oil Using Zeolite-containing Microporous and Mesoporous Mixed Catalysts with Curie Point Pyrolyzer

Catalytic Cracking of Soybean Oil Using Zeolite-containing Microporous and Mesoporous Mixed Catalysts with Curie Point Pyrolyzer

From 3D to 2D zeolite catalytic materials

Designing Hierarchical ZSM-5 Materials for Improved Production of LPG Olefins in the Catalytic Cracking of Triglycerides

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