Honeycomb non-vanadium denitration shaping catalyst, preparation method and application thereof

Abstract

The invention relates to a honeycomb non-vanadium denitration shaping catalyst, a preparation method and application thereof. The shaping catalyst is mainly obtained by shaping catalyst powder and forming additives. The catalyst powder comprises titanium dioxide and additives as main components, wherein the additives are combinations of any four or more than four of copper oxide, zirconium oxide, molybdenum oxide, iron oxide, nickel oxide, cobalt oxide, tungsten oxide and cerium oxide. The forming additives mainly comprise combinations of an enhancer, an inorganic binder, an organic binder, a pore forming agent and a lubricant. The shaping catalyst has excellent anti-SO2 and water vapor poisoning performance, and excellent denitration efficiency and high mechanical strength, and can be used in nitrogen oxide purification of stationary sources (such as a coal-fired power plant and oil catalytic cracking exhaust thereof) and mobile sources (such as diesel exhaust).

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a honeycomb non-vanadium denitrification catalyst, a preparation method and an application thereof. Background technique [0002] my country's energy composition is characterized by a lot of coal, poor oil and little gas. The massive combustion of coal has brought serious air pollution, air quality has declined, and frequent smog weather has seriously affected people's daily life, and it has restricted my country's sustainable development. further implementation of the strategy. NO x It can cause photochemical smog and acid rain, and endanger human health and destroy the ozone layer. It is the main air pollutant in my country. my country NO x Among the emissions, the emissions from coal-fired thermal power plants account for about 35-40% of the country's total emissions, and are the main NOx emissions. x Emission source. In 2011, the Ministry of Envir...

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Problems solved by technology

CN101676024A discloses a preparation method of a vanadium-based denitrification honeycomb catalyst, the catalyst has a space velocity of 5000h -1 , when the flue gas temperature is 350°C, the denitrification efficiency can reach 95%, but the recovery and treatment of vanadium-based catalysts is difficult, which will cause secondary pollution to the environment

However, the honeycomb catalyst disclosed in the patent did not investigate its water and sulfur resistance performance, and the catalyst is limited to the denitrification of cement kiln flue gas

The non-vanadium catalyst material itself does not have TiO 2 The vanadium-based catalyst is easy to form. CN103464194A discloses a preparation method of a low-temperature denitration honeycomb catalyst. The catalyst material is similar to the non-vanadium medium-high temperature material, but more than 20% of TiO is added during the forming process. 2 It is used to improve the strength of the catalyst material, resulting in an increase in the preparation cost

[0008] However, the catalyst disclosed in the above-mentioned prior art has the following disadvantages: poor anti-poisoning performance, low catalytic efficiency, in addition, the molding process of the shaped catalyst is complicated, and the mechanical strength is low

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