Direct insertion of methane into C3–C4 paraffins over zeolite catalysts: a start to the development of new one-step catalytic processes for the gas-to-liquid transformation

Echevsky, G.V.; Коденев, Е. Г.; Kikhtyanin, Oleg; Parmon, Valentin N.

doi:10.1016/j.apcata.2003.08.024

Cited by 40 publications

(30 citation statements)

References 25 publications

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“…It seems that the alkanes (propane or ethane) could be more easily activated to give surface intermediate species, and then more methane could be activated to produce aromatics. Indeed, Echevsky et al [21] had reported similar results for the reaction of methane with isobutane over a 2% Ga/HZSM-5 catalyst. Nevertheless, the present results contradict with the work of Brandford et al [22].…”

Section: Influence Of Co 2 and Ch 4 Additive On The Catalytic Activitsupporting

confidence: 50%

Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Guo¹,

Liu²,

Zhao³

et al. 2005

Journal of Molecular Catalysis A: Chemical

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Section: Influence Of Co 2 and Ch 4 Additive On The Catalytic Activitsupporting

confidence: 50%

Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Guo¹,

Liu²,

Zhao³

et al. 2005

Journal of Molecular Catalysis A: Chemical

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“…In the presence of alkenes or higher alkanes over Ga promoted ZSM-5 catalyst, they obtained a higher rate of methane conversion to higher hydrocarbons at 673-873 K. The similar results were reported by the other researchers afterwards [2][3][4][5][6][7][8][9][10]. The direct formation of benzene from methane at £823 K is thermodynamically unfavorable.…”

Section: Introductionsupporting

confidence: 89%

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Shen

Liu

et al. 2007

Catal Lett

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Methane adsorption on Mo/HZSM-5 and Pd-Ga/HZSM-5 was investigated by TPD. Even at 323 K, methane could adsorb on the catalysts. It dissociated transferred to the high hydrocarbons with temperature increase. The enough concentration of intermediates is necessary step for aromatics formation. The higher ability of hydrogenation over Pd-Ga/HZSM-5 than that over Mo/HZSM-5 was probably the reason for the rich in hydrogenation products and the lack of H 2 .

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“…Aromatic compounds such as benzene, toluene, xylene and trimethylbenzene are important raw materials in the chemical industry; they are collected as by-products of coal coking or derived from processes of catalytic reforming and gasoline cracking. There are various routes for the conversion of natural gas into aromatic hydrocarbons, e.g., the direct aromatization route [2][3][4], syngas route [5][6][7], chloride route [8][9][10][11][12], and bromide route [13][14][15]. Recently, we reported a new route: first CH 3 Br is formed from CH 4 using HBr/H 2 O as mediator in the presence of oxygen, and then CH 3 Br is catalytically transformed into hydrocarbons or compounds of high carbon number [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of H-ZSM-5 zeolites and their catalytic performance in CH3Br conversion to aromatics

Tao

Yin

et al. 2011

Reac Kinet Mech Cat

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Described in this paper are the synthesis, characterization and catalytic application of H-ZSM-5 zeolites for the conversion of CH 3 Br into aromatics. The H-ZSM-5 zeolites were fabricated by hydrothermal crystallization using n-butylamine (BTA) as a template and characterized by XRD, SEM and NH 3 -TPD techniques. The effects of batch SiO 2 /Al 2 O 3 ratio, alkalinity, NaCl/Al 2 O 3 ratio, seed crystals, and crystallization time on the yield, structure/texture and catalytic performance were systematically studied. Adopting the optimum sol (SiO 2 /Al 2 O 3 = 70, BTA/SiO 2 = 0.2847, Na 2 O/SiO 2 = 0.1237, H 2 O/SiO 2 = 37.4, NaCl/Al 2 O 3 = 60, and seed/SiO 2 = 5 wt%) and under the most preferable crystallization conditions of 100°C/24 h-170°C/24 h, H-ZSM-5 zeolites of high crystallinity and small size (300-700 nm) were obtained. Good catalytic performance was observed over the H-ZSM-5 zeolites (aromatic yield up to 44.2%). However, unlike the modification of large commercial HZSM-5, the use of MoO 3 or PbO as modifying agents for the small-size H-ZSM-5 zeolites results in a decline of catalytic performance. The relationship between the structure and the catalytic efficiency of as-synthesized H-ZSM-5 samples were investigated. It was found that with crystallinity enhancement and/or decline in crystal size, there is improvement of catalytic performance.

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Direct insertion of methane into C3–C4 paraffins over zeolite catalysts: a start to the development of new one-step catalytic processes for the gas-to-liquid transformation

Cited by 40 publications

References 25 publications

Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Dehydrogenation and aromatization of propane over rhenium-modified HZSM-5 catalyst

Adsorption properties of methane on Mo and Pd–Ga loaded HZSM-5 at mild temperature

Synthesis and characterization of H-ZSM-5 zeolites and their catalytic performance in CH3Br conversion to aromatics

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