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Preparation and Catalysis Characterization Study of Hexaaluminate High-Temperature Combustion Catalyst

Author: WuPeng
Tutor: HuRuiSheng
School: Inner Mongolia University
Course: Physical and chemical
Keywords: Hexaaluminate High temperature combustion Methane Vacuum drying method Sol - gel method .
CLC: O643.3
Type: Master's thesis
Year: 2004
Downloads: 123
Quote: 2
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Abstract


This article to traditional citrate sol - gel prepared LaMAl 11 O 19 (M = Fe , Mn , Cr ) series magnetoplumbite type the hexaaluminate compound formed by vacuum drying method and drying the the the hexaaluminate the structure LaFeAl 11 O 19 and compare the law . Sol - gel method ( glucose , maltose as a complexing agent ) were used , azeotropic distillation , prepared by homogeneous precipitation of the six - aluminate LaFeAl 11 < / sub > the O 19 < / sub>; combustion method , microwave method synthesis the six - aluminate LaMnAl 11 O 19 ; final six magnesium aluminate compounds prepared . XRD analysis of the crystal structure and particle size of the sample to B. E. T equation to calculate the specific surface area , reducing performance and infrared spectral characteristics of the samples were characterized with TPR and FT-IR techniques , investigated the catalytic activity of methane catalytic oxidation reaction . The research results show that the sol - gel method and citric acid as the complexing agent using the vacuum drying method sol - gel method maltose as the complexing agent in 1300 ℃ the prepared six - aluminate LaFeAl 11 < / sub> O 19 compounds maltose as a complexing agent is more simple and effective . Microwave method and combustion method can synthesize the single phase hexaaluminate the structure LaMnAl 11 O 19 < / sub > . For the the Preparation of hexaaluminate proposed a new method . < / Sub> O in the the homogeneous precipitation prepared MgFeAl 11 19 catalytic activity of methane combustion better conversion temperature T the and T 100 < / sub > 495 ℃ and 680 ℃ , respectively , the currently excellent international high-temperature combustion catalyst activity standard T 10 = 450 ° C , T 100 = 600 ° C are similar .

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