Bifunctional catalyst for synergistic purification of nitric oxides and volatile organic compounds and preparation method thereof

Abstract

The invention discloses a bifunctional catalyst for synergistic purification of nitrogen oxides and volatile organic compounds and a preparation method of the bifunctional catalyst. The catalyst comprises a carrier and an active component, wherein the active component comprises a transition metal oxide. According to the bifunctional catalyst for synergetic purification of nitrogen oxides and volatile organic compounds provided by the invention, the transition metal oxide is used as the active component and is attached to the carrier, so synergetic removal of VOCs and NOx can be realized, highremoval rate and high selectivity of a target product are realized, reaction temperature is reduced, reaction energy consumption is lowered, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a dual-function catalyst for synergistic purification of nitrogen oxides and volatile organic compounds and a preparation method thereof. Background technique [0002] With the development of my country's economy and the improvement of people's living standards, the output of urban domestic waste is also increasing at an alarming rate. The phenomenon of "garbage besieged cities" in various regions of our country is becoming more and more serious. Composting, etc., among which the reduction effect of waste incineration technology is the most obvious. After incineration, the waste volume can be reduced by 80% to 90%, and the quality can be reduced by about 75%. Moreover, the heat energy generated during the incineration process can be recycled. The mainstream at home and abroad, accounting for 35% of the total garbage removal volume. Waste incineration produces a large amount of n...

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Problems solved by technology

[0003] At present, the flue gas purification system of most waste-to-energy plants is generally composed of waste heat boiler-semi-dry deacidification-activated carbon adsorption of dioxins-bag dust removal-heating-SCR denitrification-chimney and other parts connected in series. This flue gas purification system equipment Large area, high investment cost, complicated process, and huge energy consumption; furthermore, the activated carbon adsorption process cannot realize the form transformation of organic pollutants, and the fly ash still needs to be processed later, and the process is affected by the quality of activated carbon, uniform mixing degree, residence time and flue gas temperature, the efficiency is low and the operating cost is too high; in addition, the flue gas temperature is reduced to about 220°C after semi-dry deacidification, while commercial catalysts (for example, V-W / T i ) has an active temperature range of 300°C-400°C, and the flue gas needs to be reheated, which will inevitably cause energy waste

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