Low-temperature CO-SCR denitration Cu-Ni/AC catalyst and preparation method thereof

Abstract

The invention discloses a low-temperature CO-SCR denitration Cu-Ni / AC catalyst which comprises a carrier and active components, the carrier is coconut shell activated carbon (AC), and the active components are copper and nickel oxides. The mass ratio of the copper element to the nickel element to the AC in the low-temperature CO-SCR denitration Cu-Ni / AC catalyst is (0.02-0.1): (0.01-0.05): 1. Theinvention also discloses a preparation method of the catalyst. The preparation method comprises the following steps of: respectively dissolving copper nitrate and a nickel acetate reagent with deionized water to obtain a mixed precursor solution, impregnating the coconut shell activated carbon in a formula ratio, and carrying out loading and drying to obtain a primary product; and roasting the dried primary product for 4 hours under the protection of nitrogen at 450 DEG C to obtain the low-temperature CO-SCR denitration Cu-Ni / AC catalyst. The low-temperature CO-SCR denitration Cu-Ni / AC catalyst disclosed by the invention has the characteristics of high denitration activity, good nitrogen selectivity and wide denitration temperature range. The Cu-Ni / AC catalyst provided by the invention hasthe advantages of simplified preparation process, low energy consumption, good dispersity of active components, environment-friendliness and no pollution.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and sintering flue gas purification, and specifically relates to a low-temperature CO-SCR denitrification Cu-Ni / AC catalyst and a preparation method thereof. Background technique [0002] With the increasing demand for steel in my country's economic development, the steel industry has become the material basis and an important pillar industry for the development of the national economy and national defense construction. The NOx produced by it is one of the important reasons for the formation of photochemical smog and acid rain. With the full implementation and enforcement of ultra-low emission standards, it is imperative and imminent to increase the coordinated treatment of multi-pollutants in sintering flue gas! [0003] At present, the mature denitrification terminal treatment technologies for sintering flue gas mainly include SCR denitrification and carbon material (activated carbon or activ...

AI Technical Summary

Problems solved by technology

"Carbon-based catalyst multi-pollutant synergistic removal and resource utilization technology" can achieve desulfurization and denitrification and multi-pollutant synergistic treatment under the condition of sintering flue gas temperature, but there are problems of low denitrification performance and limited denitrification rate, and traditional carbon The reducing agent for the denitrification of the base catalyst is NH 3 , is a toxic and corrosive reducing agent, and NH 3 itself is easy to interact with SO in the flue gas 2 、H 2 O, etc. generate ammonium salts, which cause blockage and poisoning of the internal pores of the catalyst

[0004] Therefore, it is necessary to provide a denitrification catalyst to solve the problems of the existing denitrification catalysts such as low denitrification rate at low temperature, easy blockage of pores, and narrow denitrification temperature range.

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