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The Study of Fe2O3 Methane Combustion Catalyst

Author: LiLiNa
Tutor: GongMaoChu
School: Sichuan University
Course: Physical and chemical
Keywords: Catalytic combustion of methane Fe2O3 Catalytic activity Oxygen - conducting material Oxygen storage material Reaction conditions
CLC: O643.3
Type: Master's thesis
Year: 2003
Downloads: 118
Quote: 2
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Abstract


This thesis mainly studied to the of Fe 2 O 3 for the active ingredient , different oxygen - ion conductive material and an oxygen storage material as the carrier of the monolithic combustion catalyst in methane catalytic burning in the catalytic performance . And discuss the impact of different reaction conditions on the catalytic activity of the two types of . Caused by the catalytic activity of different reasons , and after high-temperature aging mechanism of inactivation by XPS, TPR . The results show that , in the Fe 2 O 3 for the active ingredient having an oxygen ion-conductive function of YSZ-Al 2 O 3 as the carrier of the catalyst prepared in the order of catalytic activity before and after aging for Fe 2 O 3 / YSZ-Al 2 O 3 > Fe 2 O 3 / ZrO 2 -Al 2 O 3 > Fe 2 O 3 / γ-Al 2 O 3 . Description the ZrO 2 and Y 2 < / sub > O 3 < / sub> is added to enhance the catalytic activity of the catalyst as well as anti-aging performance . XPS results showed that the ZrO 2 Y 2 O 3 , while adding able to increase and stabilize the Fe 2 O < sub > 3 surface concentration , resulting in a high activity and high stability of the catalyst . Fe 2 O 3 as the active component to the oxygen storage material CeO 2 -ZrO 2 as carrier system The obtained the Fe 2 O 3 < / sub > / CeO 2 -ZrO 2 catalyst . Add E and M in the carrier . The results show that the E and M are simultaneously added to the carrier than the vector alone , plus E plus separate the catalyst activity of M has significantly improved . E added can be weakened M and Fe 2 O 3 the interaction , reducing FeMO 2 generated . M multiple valence transition become a key factor in improving the activity of the catalyst . For the oxygen ion conductive material and the oxygen storage material as a carrier of two methane combustion catalyst, under certain reaction conditions having the optimum catalytic effect : The space velocity was 6000h -1 , the reaction gas the alkoxy oxygen ratio of 1:4, and the content of the diluent gas is 60 % .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
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