Compounded denitration catalyst, as well as preparation method and application thereof

A denitration catalyst and composite technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low denitrification performance of catalysts, high toxicity of precursors, and high cost of catalysts, and improve low-temperature denitrification performance , Improve the safety of use and reduce the cost
CN102909004AActive Publication Date: 2013-02-06BEIJING UNIV OF CHEM TECH
4 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2013-02-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a compounded denitration catalyst and a preparation method thereof, and belongs to the technical field of environment catalysis and atmospheric pollution controlling. The catalyst adopts titanium dioxide as a carrier, cerium dioxide as a main active component, and molybdenum trioxide as secondary active component performing a synergistic effect, and is prepared according to a stepped impregnation method. The compounded denitration catalyst is characterized in that due to the adding of molybdenum trioxide, the denitration performance of cerium-titanium catalyst is improved obviously, the active temperature window is widened, and the water resistance of the catalyst is also improved obviously. The method for reducing nitrogen oxides comprises the following steps: filling the catalyst into a fixed bed reactor; controlling the reaction temperature range to be 250 to 400 DEG C; and taking ammonia as a reducing agent. The cerium-molybdenum-titanium compounded catalyst prepared according to the invention is 12,8000 per hour in space velocity, and can purify nitrogen oxides with the efficiency ranging from 83 to 98 percent at the temperature ranging from 250 to 400 DEG C.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a composite catalyst, its preparation and a method for selectively catalytically reducing nitrogen oxides under oxygen-enriched conditions by using the catalyst. It is suitable for nitrogen oxides (NO x ) and belongs to the technical field of environmental catalysis and air pollution control. Background technique

[0002] Nitrogen oxides are a major air pollutant, and the acid rain and photochemical smog caused by them have become increasingly prominent global environmental problems. Therefore, the emission control of NOx under oxygen-enriched conditions has become an important issue in the field of atmospheric environmental protection technology. research hotspot. Ammonia selective catalytic reduction (Selective catalytic reduction, SCR) is considered to be one of the most effective methods to eliminate NOx from stationary sources, and the core issue is the development of catalysts. Currently, NH for industrial applications...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More