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NMR Characterization of Ga-or Fe-MCM-41 and its Comparison with MFI-type Ga-or Fe-silicate
Takeguchi, Tatsuya,Kim, Jin-Bae,Inui, Tomoyuki 전남대학교 촉매연구소 1997 촉매학술발표회 Vol.- No.14
It has been reported that incorporation of Fe or Ga into the framework of MFI zeolite structure exhibits excellent functions, such as gasoline synthesis [1] and aromatization [2]. On the other hand, Mobil has patented a family of mesoporous molecular sieve materials designated MCM-41 [3], while Inagaki et al. also have prepared the mesoporous materials from Kanemite [4]. These materials have their uniform and relatively large pore diameter ranging from 15 to 100 Å [3]. Application to the catalyst is promising especial for bulky hydrocarbons or rapid conversion due to low diffusion resistance resulting from larger pore sizes [5]. In this study, the effect of incorporation of Ga and Fe into the MFI zeolite and MCM-41 was examined.
( Tomoyuki Inui ),( Kotaro Ichino ),( Isao Matsuoka ),( Tatsuya Takeguchi ),( Shinji Iwamoto ),( Shu Bin Pu ),( Sei Ichi Nishimoto ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
Development in highly active catalysts for the reforming of methane with CO₂and partial oxidation of methane was conducted to produce hydrogen and carbon monoxide with high reaction rates. An Ni-based four-components catalyst, Ni-Ce₂O₃-Pt-Rh, supported on an alumina wash-coated ceramic fiber in a plate shape was suitable for the objective reaction. By combining the catalytic combustion of ethane or propane, methane conversion was markedly enhanced, and a high space-time yield of syngas, 25,000 ㏖/ℓ·h was obtained at a catalyst temperature of 700℃ or furnace temperature of 500℃. The extraordinary high space-time yield of syngas was also confirmed even under the very rapid flow rate conditions as a contact time of 3 m-sec by using a monolithic shape of catalyst bed without back pressure.
Inui, Tomoyuki,Ichino, Kotaro,Matsuoka, Isao,Takeguchi, Tatsuya,Iwamoto, Shinji,Pu, Shu Bin,Nishimoto, Sei-ichi 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.6
Development in highly active catalysts for the reforming of methane with CO₂and partial oxidation of methane was conducted to produce hydrogen and carbon monoxide with high reaction rates. An Ni-based four-components catalyst, Ni-Ce₂O₃-Pt-Rh, supported on an alumina wash-coated ceramic fiber in a plate shape was suitable for the objective reaction. By combining the catalytic combustion of ethane or propane, methane conversion was markedly enhanced, and a high space-time yield of syngas, 25,000 ㏖/ℓ·h was obtained at a catalyst temperature of 700℃ or furnace temperature of 500℃. The extraordinary high space-time yield of syngas was also confirmed even under the very rapid flow rate conditions as a contact time of 3 m-sec by using a monolithic shape of catalyst bed without back pressure.