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26-P-23-New catalysts for isomerization of long-chain n-paraffins
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26-P-21 - Hydroisomerization of n-hexadecane catalysts: Two different AI incorporation methods
over
Pt/AI-MCM-41
K.-C. Park and S.-K. Ihm
Dept. of Chem. Eng., KAIST, Taejon, skihm@_mai!.kaist.ac.kr, Korea. The hydroisomerization of n-hexadecane was carried out over Pt/A1-MCM-41 catalysts at 350~ and 103 bar. A1-MCM-41 was prepared by two different methods; a direct sol-gel method (Pre) and a post-grafting method (Post). A1-MCM-41 was characterized by using XRD, nitrogen adsorption, 27A1 NMR and ammonia TPD. The higher the amount of acid sites was, the higher the reactivity and isomer yield were. Pt/A1-MCM-41-Post showed higher conversions and higher isomerization yield than Pt/A1-MCM-41-Pre. Reaction results did not agree with A1-NMR data but with ammonia TPD. This difference was attributed to the better accessibility of tetrahedral sites (Broensted acid sites) in AI-MCM41-Post than those in A1-MCM-41-Pre.
26-P-22 - Zr-containing hexagonal mesoporous silicas as supports for hydrotreating catalysts N.G. Kostova, A.A. Spojakina, L.A. Petrov, O. Solcova a and K. Jiratova a
Institute of Catalysis, Bulgarian Academy of Science, Sofia, Bulgaria - [email protected]; alnstitute of Chemical Process Fundamentals, Acad. Sci. czech Republic, Prague This work reports the preparation of new supports for Mo- and NiMo-hydrotreating catalysts. Zr-containing mesoporous silicas with Zr/Si ratio from 0 up to 0.04 were prepared using TEOS, ZrOC102 and dodecylamine as a template. The materials and those modified with 12 % wt. Mo from 12-phosphomolybdic acid (HPMo) and its nickel salt were characterised by IR, TPD of NH3, TPR and their activities were measured in thiophene HDS. Activities in HDS of thiophene of Mo-containing catalysts prepared with the mesoporous silicas were higher than those of the catalysts prepared with amorphous silica.
26-P-23 - New catalysts for isomerization of long-chain n-paraffins M.I. Levinbuk,1 L.M. Kustov,2 T.V. Vasina,2 O.V. Masloboishchikova,2 M.L. Pavlov,3 I.E. Gorbatkina 4 and V.A. Khavkin 4
1Moscow Oil and Gas University, 65 Leninsky prospect, 1117917 Moscow, Russia 2N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia 3Salavat Catalyst Factory, Salavat, 4 Moscow Research Institute of Oil Refining, Russia Novel Y-type zeolite-based catalysts for isomerization of long-chain paraffins (nCT-nCl6) and aromatics hydrogenation have been developed. They provide high selectivity to isomerate with minimal feed cracking. Isomerization of nC7 is accompanied by benzene hydrogenation into methylcyclopentane and cyclohexane. Each reaction occurs on different sites and proceeds without altering the other one. The effect of the ratio of iso to n paraffins in gasoline fraction (IBP-62~ and 100-130~ was studied. Altenative methods to use the new catalysts in oil processing have been considered.
26-P-21 - Hydroisomerization of n-hexadecane catalysts: Two different AI incorporation methods
over
Pt/AI-MCM-41
K.-C. Park and S.-K. Ihm
Dept. of Chem. Eng., KAIST, Taejon, skihm@_mai!.kaist.ac.kr, Korea. The hydroisomerization of n-hexadecane was carried out over Pt/A1-MCM-41 catalysts at 350~ and 103 bar. A1-MCM-41 was prepared by two different methods; a direct sol-gel method (Pre) and a post-grafting method (Post). A1-MCM-41 was characterized by using XRD, nitrogen adsorption, 27A1 NMR and ammonia TPD. The higher the amount of acid sites was, the higher the reactivity and isomer yield were. Pt/A1-MCM-41-Post showed higher conversions and higher isomerization yield than Pt/A1-MCM-41-Pre. Reaction results did not agree with A1-NMR data but with ammonia TPD. This difference was attributed to the better accessibility of tetrahedral sites (Broensted acid sites) in AI-MCM41-Post than those in A1-MCM-41-Pre.
26-P-22 - Zr-containing hexagonal mesoporous silicas as supports for hydrotreating catalysts N.G. Kostova, A.A. Spojakina, L.A. Petrov, O. Solcova a and K. Jiratova a
Institute of Catalysis, Bulgarian Academy of Science, Sofia, Bulgaria - [email protected]; alnstitute of Chemical Process Fundamentals, Acad. Sci. czech Republic, Prague This work reports the preparation of new supports for Mo- and NiMo-hydrotreating catalysts. Zr-containing mesoporous silicas with Zr/Si ratio from 0 up to 0.04 were prepared using TEOS, ZrOC102 and dodecylamine as a template. The materials and those modified with 12 % wt. Mo from 12-phosphomolybdic acid (HPMo) and its nickel salt were characterised by IR, TPD of NH3, TPR and their activities were measured in thiophene HDS. Activities in HDS of thiophene of Mo-containing catalysts prepared with the mesoporous silicas were higher than those of the catalysts prepared with amorphous silica.
26-P-23 - New catalysts for isomerization of long-chain n-paraffins M.I. Levinbuk,1 L.M. Kustov,2 T.V. Vasina,2 O.V. Masloboishchikova,2 M.L. Pavlov,3 I.E. Gorbatkina 4 and V.A. Khavkin 4
1Moscow Oil and Gas University, 65 Leninsky prospect, 1117917 Moscow, Russia 2N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia 3Salavat Catalyst Factory, Salavat, 4 Moscow Research Institute of Oil Refining, Russia Novel Y-type zeolite-based catalysts for isomerization of long-chain paraffins (nCT-nCl6) and aromatics hydrogenation have been developed. They provide high selectivity to isomerate with minimal feed cracking. Isomerization of nC7 is accompanied by benzene hydrogenation into methylcyclopentane and cyclohexane. Each reaction occurs on different sites and proceeds without altering the other one. The effect of the ratio of iso to n paraffins in gasoline fraction (IBP-62~ and 100-130~ was studied. Altenative methods to use the new catalysts in oil processing have been considered.