CrXCo3-XO4 spinel type catalyst and preparation method thereof

A spinel-type catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as poor methane oxidation effect and unsatisfactory tail gas purification effect, and achieve outstanding methane oxidation ability , Abundant raw materials, good thermal stability
CN101722004AInactive Publication Date: 2010-06-09TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2010-06-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a CrXCo3-XO4 spinel type catalyst for purifying tail gas of gas-fueled vehicles. An A site of a spinel AB2O4 structure comprises positive divalent cobalt elements, and a B site comprises chromium elements or chromium elements and positive divalent cobalt elements, wherein the molar ratio of the positive divalent cobalt elements to the sum of positive trivalent cobalt elements and the chromium elements to oxygen elements is 1:2:4. The preparation method of the CrXCo3-XO4 spinel type catalyst comprises the steps of: (1) respectively preparing a chromic nitrate solution and a cobalt nitrate solution with deionized water; (2) according to the proportion of the cobalt elements and the chromium elements, weighing the chromic nitrate solution and the cobalt nitrate solution which are prepared in the step (1), and uniformly mixing the two solutions by magnetic stirring; (3) adding an ammonia solution to regulate the pH value to obtain a suspension; and (4) carrying out vacuum filtration on the suspension obtained in the step (3), putting filter cakes in a drying box for drying, and then, transferring the filter cakes into a muffle furnace for roasting. The CrXCo3-XO4 spinel type catalyst has the characteristics of good heat stability, simple structure, low cost and wide application prospects.
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Description

technical field

[0001] The invention relates to the technical field of catalyst preparation, in particular to a Cr X co 3-X o 4 Spinel-type catalyst and its preparation method. Background technique

[0002] With the continuous improvement of the modernization of human society, the global demand for automobiles is increasing day by day. Automobiles bring convenience to human beings but also bring serious problems. Automobiles consume a large amount of oil resources, exacerbating the oil shortage crisis, and at the same time, the large amount of harmful gases emitted by automobiles cause serious pollution to the environment. In order to solve the two major problems of energy crisis and environmental pollution, all over the world are actively developing the use of natural gas, one of the clean energy sources, as vehicle fuel. With its high efficiency and low pollution as its main characteristics, natural gas vehicles have become an inevitable choice for the development of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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