Synthesis of ZSM-5/SAPO-11 composite and its application in FCC gasoline hydro-upgrading catalyst

Fan, Yu; Lei, Duo; Shi, Gang; Bao, Xiaojun

doi:10.1016/j.cattod.2006.02.050

Cited by 107 publications

(60 citation statements)

References 28 publications

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“…Some zeolite composites have been developed as catalysts for catalytic cracking [6][7][8], alkylation [9] and MTO [10], etc. The preparation and properties of the zeolite composite significantly affect its catalytic performance [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesized HZSM-5/SAPO-34 Composite Zeolite Catalyst for Ethanol Conversion to Propylene

et al. 2011

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HZSM-5/SAPO-34 zeolite composites were prepared by hydrothermal synthesis (ZS-HS) and mechanical mixture (ZS-MM), respectively. ZS-HS showed higher propylene yield and better catalytic stability in ethanol conversion than ZS-MM as well as HZSM-5 and SAPO-34. In case of ZS-HS, SAPO-34 at least partially overlapped on HZSM-5, which resulted in the interfacial interaction of HZSM-5 and SAPO-34. Such interaction significantly modified the texture and the acidity of ZS-HS, which in turn affected its catalytic reactivity. ZS-HS showed the higher apparent formation rate of propylene, due to its moderate concentration and strength distribution of acid sites. Propylene, ethylene and butylenes might produce through the parallel reaction pathways and the common intermediate on ZS-HS.

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Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesized HZSM-5/SAPO-34 Composite Zeolite Catalyst for Ethanol Conversion to Propylene

et al. 2011

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“…This is because: (1) previous experimental results [12][13][14][15] had confirmed that the n-paraffins and i-paraffins are less active in FCC gasoline hydro-upgrading, as reflected by the great increases in their contents resulting from the olefin conversion; (2) it is known that the adsorption of olefins on bifunctional catalysts is much easier than that of paraffins, and thus the presence of olefins in the feedstock can remarkable restrain the adsorption of paraffins and their subsequent conversion [16,17]; (3) the presence of excess hydrogen also inhibits the paraffin dehydrogenation on non-noble metal sites, namely the first step in the paraffin conversion [18].…”

Section: Lump Selection and The Reaction Networkmentioning

confidence: 86%

“…Unlike FCC gasoline secondary reactions and FCC gasoline aromatization in the absence of hydrogen, coke formation in FCC gasoline hydro-upgrading can be greatly depressed in the presence of hydrogen [12][13][14]. In view of the very high liquid yield ([98 wt%) of the FCC gasoline hydro-upgrading process [4,12,13], the dry gas and LPG yields are likewise neglectable.…”

Section: Lump Selection and The Reaction Networkmentioning

confidence: 92%

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A Six-Lump Kinetic Model for Olefin Hydrogenation, Hydroisomerization and Aromatization in FCC Gasoline Hydro-Upgrading

et al. 2008

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A six-lump kinetic model was developed to predict the yields of the target products i-paraffin and aromatics in the FCC gasoline hydro-upgrading process aiming at olefin reduction and octane preservation. The experimental data obtained in a fixed bed reactor were used to estimate the eight kinetic constants and the corresponding activation energies in the model using the Marquardt algorithm. The model testing results revealed that the model predictions were in good agreement with the experimental results, indicating the excellent reliability of the model. Furthermore, the model could be extended to different feedstocks and wide operating conditions. The optimal operating conditions for producing Euro IV clean gasoline with the desired olefin and aromatics contents were determined on the basis of the predicted product yields and verified by the experimental results.

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“…[13][14][15][16] Fan et al 13 synthesized aluminosilicate/silicoaluminophosphate composite of ZSM-5/SAPO-11. Compared with the mechanical mixture of ZSM-5 and SAPO-11, the composite of ZSM-5/SAPO-11 had more mesopores and moderate acidity distribution which could accelerate the diffusion of products and could be considered as a potential catalyst system for hydro-upgrading FCC gasoline.…”

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confidence: 99%

Synthesis of Hβ (core)/SAPO-11 (shell) Composite Molecular Sieve and its Catalytic Performances in the Methylation of Naphthalene with Methanol

Wang¹,

Guo²,

Zhao³

2013

Bulletin of the Korean Chemical Society

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Hβ (core)/SAPO-11 (shell) composite molecular sieve was synthesized by the hydrothermal method in order to combine the advantages of Hβ and SAPO-11 for the methylation of naphthalene with methanol. For comparison, the mechanical mixture was prepared through the blending of Hβ and SAPO-11. The physicochemical properties of Hβ, SAPO-11, the composite and the mechanical mixture were characterized by various characterization methods. The characterization results indicated that Hβ/SAPO-11 composite molecular sieve exhibited a core-shell structure, with the Hβ phase as the core and the SAPO-11 phase as the shell. The pore diameter of the composite was between that of Hβ and SAPO-11. The composite had fewer acid sites than Hβ and mechanical mixture while more acid sites than SAPO-11. The experimental results indicated that the composite exhibited high catalytic performances for the methylation of naphthalene with methanol.

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Synthesis of ZSM-5/SAPO-11 composite and its application in FCC gasoline hydro-upgrading catalyst

Cited by 107 publications

References 28 publications

Hydrothermally Synthesized HZSM-5/SAPO-34 Composite Zeolite Catalyst for Ethanol Conversion to Propylene

Hydrothermally Synthesized HZSM-5/SAPO-34 Composite Zeolite Catalyst for Ethanol Conversion to Propylene

A Six-Lump Kinetic Model for Olefin Hydrogenation, Hydroisomerization and Aromatization in FCC Gasoline Hydro-Upgrading

Synthesis of Hβ (core)/SAPO-11 (shell) Composite Molecular Sieve and its Catalytic Performances in the Methylation of Naphthalene with Methanol

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