Iron-copper composite molecular sieve based honeycomb type denitration catalyst and preparation method thereof

Abstract

Belonging to the field of air pollution control technology and environment-friendly catalytic material technology, the invention in particular relates to an iron-copper composite molecular sieve basedhoneycomb type denitration catalyst and a preparation method thereof. The iron-copper composite molecular sieve based honeycomb type denitration catalyst utilizes the synergistic effect of an iron copper loaded molecular sieve-titanium dioxide carrier and tungsten trioxide / molybdenum trioxide to improve the denitration activity and water and sulfur poisoning resistance of the honeycomb type denitration catalyst, has relatively low consumption of high cost molecular sieve carrier, and is an environment-friendly denitration catalyst with controllable cost. According to the invention, the molecular sieve iron-copper metal loading and catalyst mixing are completed synchronously, the process is simplified, the production efficiency is improved, and the production cost is lowered. Pseudo-boehmite is added in the mixing process, can balance the acidity produced by ion exchange of the molecular sieve, also can utilize the easy peptization characteristic to improve the mechanical strength of the honeycomb type denitration catalyst finally.

Description

technical field [0001] The invention belongs to the technical fields of air pollution control technology and environmental protection catalytic material, and in particular relates to an iron-copper composite molecular sieve-based honeycomb denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxide pollutants mainly come from stationary sources such as coal-fired power plants and industrial boilers, and mobile sources such as motor vehicle exhaust emissions. Nitrogen oxides are not only the basis of nitric acid rain, but also one of the main substances that form photochemical smog, cause the greenhouse effect and destroy the ozone layer. They have a strong toxic effect on the human body, the environment and ecology. With the rapid development of the domestic economy, the coal-based energy structure has led to a rapid increase in the emission of nitrogen oxide pollutants, seriously polluting the ecological environment, and has become on...

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Problems solved by technology

For example, patents such as publication numbers CN101925405B, CN102302944B, and CN105618159A disclose the preparation method of an integral extruded denitration catalyst material based on a metal-loaded molecular sieve as the main body. Higher, and in the preparation process, the process conditions such as pseudo-boehmite peptization, extrusion molding and drying are relatively high