Chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst, and preparation method and application thereof

Abstract

The invention discloses a chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst, and a preparation method and an application thereof. The chromium-cobalt-based nitric oxide normal-temperature normal-pressure catalyst is prepared by adopting an optimized coprecipitation technology, and the surface physicochemical properties of the chromium-cobalt-based catalyst are regulated by introducing a small amount of L-ascorbic acid in the precipitation process in order to improve the nitric oxide normal-temperature normal-pressure catalysis performance. The chromium-cobalt-basedcatalyst has the characteristics of good NO normal-temperature oxidation activity, high stability and the like. The preparation method has the advantages of simplicity, easiness in large-scale production, and excellent application prospect.

Description

technical field

[0001] The invention relates to the field of nanomaterial preparation, in particular to a preparation method of a chromium-cobalt-based nitric oxide catalyst at normal temperature and pressure, as well as its preparation method and application. Background technique

[0002] Nitrogen oxides can form acid rain and acid fog; form photochemical smog with hydrocarbons; participate in the destruction of the ozone layer, etc., causing great harm to the ecological environment and human health. The country has formulated a series of strict emission standards for NOx emissions, and has also achieved certain results in industrial exhaust gas treatment. But despite this, low-concentration NOx emissions will still cause damage to humans and the environment when they accumulate to a certain concentration in the atmosphere. Therefore, it is urgent to develop low-concentration, even low-concentration NOx treatment technologies at room temperature.

[0003] The main compone...