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Preparation method of NH3-SCR flue gas desulfurization catalyst and catalyst thereof

A NH3-SCR, denitration catalyst technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of poor thermal stability, harm, toxic environment of active component vanadium and human health, etc. Water and sulfur resistance, low price, and the effect of increasing catalyst active sites and surface acid sites

Inactive Publication Date: 2018-11-16
HENAN UNIV OF SCI & TECH
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Problems solved by technology

V 2 o 5 -WOx / TiO 2 It is the most commercially available denitrification catalyst today, with an active temperature window of 300-400°C, poor thermal stability, and easy to release SO 2 Oxidation to SO 3 , the active component vanadium is toxic and can cause harm to the environment and human health

Method used

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  • Preparation method of NH3-SCR flue gas desulfurization catalyst and catalyst thereof
  • Preparation method of NH3-SCR flue gas desulfurization catalyst and catalyst thereof

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the parts not described in detail below are all existing technologies or can be realized by using existing technologies.

[0019] a NH 3 -The preparation method of SCR flue gas denitrification catalyst, comprises the steps:

[0020] Step 1. Material preparation:

[0021] 1) Take H-ZSM-5 zeolite molecular sieve (SiO 2 / Al 2 o 3 =27, Tianjin Nankai University Chemical Reagent Factory), using a muffle furnace at 500 ° C for 3 h to remove water and impurities, cooled to room temperature, as a carrier;

[0022] 2) Weigh 40.4g of iron nitrate Fe(NO 3 ) 2 •9H 2 O (Tianjin Damao Chemical Reagent Factory, analytically pure) was fully dissolved in 500mL distilled water to prepare 0.2mol / L ferric nitrate solution;

[0023] 3) Weigh 24.16g copper nitrate Cu(NO 3 ) 2 •3H 2 O (Tianjin Damao Chemical Reagent Factory, analytically pure) ...

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Abstract

The invention relates to the technical field of the flue gas desulfurization catalyst, and specifically relates to a preparation method of an NH3-SCR flue gas desulfurization catalyst and the catalystthereof. The preparation method of the catalyst comprises the following steps: dispersing ZSM-5 zeolite carrier into a composite solution of ferric nitrate and copper nitrate, wherein the mole ratioof Fe atoms to Cu atoms in the composite solution is 1:4, the mass of the Fe element is 10% of the mass of the ZSM-5 carrier, and the dispersing method comprises stirring for 4-6h at 50-60 DEG C by adopting a magnetic stirrer, and ultrasonically oscillating for 40min; discarding supernatant after stratification of the dispersion system, drying a precipitate in an electric constant-temperature blast air oven, grinding the precipitate into powder after drying, then roasting in a muffle furnace, and repeatedly grinding into powder after roasting, thereby obtaining the flue gas desulfurization catalyst. The catalyst prepared with the method disclosed by the invention has a relatively wide active temperature window, and has the advantages of being low in price, environmentally-friendly and thelike.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification catalysts, in particular to a NH 3 - preparation method of SCR flue gas denitrification catalyst and catalyst thereof. Background technique [0002] Pollutant emissions from coal power generation are mainly particulate matter, sulfur dioxide, and nitrogen oxides (NOx) in flue gas. The discharge of nitrogen oxides into the atmosphere will cause problems such as acid rain and photochemical smog, and cause serious damage to the environment, crop growth and human production and life. [0003] NH 3 -SCR technology has become the most widely used coal-fired power plant flue gas denitrification treatment in the world due to its high selectivity, economy, and high denitrification efficiency. V 2 o 5 -WOx / TiO 2 It is the most commercially available denitrification catalyst today, with an active temperature window of 300-400°C, poor thermal stability, and easy to release SO 2 Oxidati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01J37/02B01J37/08B01J37/34B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2251/2062B01D2258/0283B01J29/46B01J37/0201B01J37/088B01J37/343B01J2229/18
Inventor 王学涛胡海鹏张乾蔚苏晓昕梁彦正李健邢利利刘春梅
Owner HENAN UNIV OF SCI & TECH
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