Key points of anti alkali metal SCR denitrification catalyst technology
Publishdate：2020-11-25 Views：48
Denitration catalystI generally refers to the catalyst on the selective catalytic reduction (SCR) denitrification system of a power plant, which promotes the selective chemical reaction between the reducing agent and nitrogen oxides in the flue gas at a certain temperature in the SCR reaction. As an important component of smoke control, it has been widely applied in various fields such as power and non power industries, and has achieved good results.
The most commonly used denitrification catalyst in the current market is the V2O5-WO3 (MoO3)/TiO2 series. Due to different combustion materials and smoke components, the production of catalysts with different components is promoted.
Characteristics of Glass Kiln Smoke
The alkali metal content is high and the dust content is high.
Domestic glass production lines mainly use coal tar, heavy oil, natural gas, and producer gas as fuels, with small dust particle size, strong adhesion, and high NOx concentration in flue gas, mostly above 2000mg/m3; In addition, during the dynamic heat exchange process of the furnace, the concentrations of SO2, NOx, and dust will undergo drastic changes, increasing the difficulty of flue gas denitrification.
Characteristics of flue gas from biomass power generation
The hydrogen content in biomass is relatively high, and the moisture content in flue gas is also high, with a moisture content of up to 15% -30%. The alkali metal content in flue dust is high, reaching over 8%. Furthermore, the concentrations of SO2 and NOx are low and fluctuate greatly. When burning pure biomass, the mass concentrations of SO2 and NOx fluctuate between 100-250 mg/m3.
Difficulties in denitrification treatment of flue gas from glass furnaces and biomass power generation
Mainly due to high alkali metal content and high viscosity, especially when the fuel is tar.
Alkali metal ions such as Na+, K+, Mg2+, Ga2+, etc. are widely present in flue gas and are prone to chemical bonding with the structure of V2O5, opening the V-OH bond, occupying surface acidic and active sites, generating compounds without catalytic ability, weakening the adsorption and activation ability of reducing agent NH3, and inhibiting the ability of NO to oxidize to surface NO2, resulting in the inhibition of several SCR reaction pathways on the catalyst, Serious catalyst deactivation occurred.
Anti alkali metal SCR denitrification catalyst
In response to the characteristics of flue gas and emission reduction difficulties in the above industries, Yuanchen Technology has developed a matching alkali metal SCR denitrification catalyst, which can efficiently remove NOx from the flue gas under the above working conditions and has good resistance to alkali metal poisoning. The commonly used honeycomb denitrification catalysts have 20 pores, 22 pores, and 25 pores.
Denitration catalystI generally refers to the catalyst on the selective catalytic reduction (SCR) denitrification system of a power plant, which promotes the selective chemical reaction between the reducing agent and nitrogen oxides in the flue gas at a certain temperature in the SCR reaction. As an important component of smoke control, it has been widely applied in various fields such as power and non power industries, and has achieved good results.
The most commonly used denitrification catalyst in the current market is the V2O5-WO3 (MoO3)/TiO2 series. Due to different combustion materials and smoke components, the production of catalysts with different components is promoted.
Characteristics of Glass Kiln Smoke
The alkali metal content is high and the dust content is high.
Domestic glass production lines mainly use coal tar, heavy oil, natural gas, and producer gas as fuels, with small dust particle size, strong adhesion, and high NOx concentration in flue gas, mostly above 2000mg/m3; In addition, during the dynamic heat exchange process of the furnace, the concentrations of SO2, NOx, and dust will undergo drastic changes, increasing the difficulty of flue gas denitrification.
Characteristics of flue gas from biomass power generation
The hydrogen content in biomass is relatively high, and the moisture content in flue gas is also high, with a moisture content of up to 15% -30%. The alkali metal content in flue dust is high, reaching over 8%. Furthermore, the concentrations of SO2 and NOx are low and fluctuate greatly. When burning pure biomass, the mass concentrations of SO2 and NOx fluctuate between 100-250 mg/m3.
Difficulties in denitrification treatment of flue gas from glass furnaces and biomass power generation
Mainly due to high alkali metal content and high viscosity, especially when the fuel is tar.
Alkali metal ions such as Na+, K+, Mg2+, Ga2+, etc. are widely present in flue gas and are prone to chemical bonding with the structure of V2O5, opening the V-OH bond, occupying surface acidic and active sites, generating compounds without catalytic ability, weakening the adsorption and activation ability of reducing agent NH3, and inhibiting the ability of NO to oxidize to surface NO2, resulting in the inhibition of several SCR reaction pathways on the catalyst, Serious catalyst deactivation occurred.
Anti alkali metal SCR denitrification catalyst
In response to the characteristics of flue gas and emission reduction difficulties in the above industries, Yuanchen Technology has developed a matching alkali metal SCR denitrification catalyst, which can efficiently remove NOx from the flue gas under the above working conditions and has good resistance to alkali metal poisoning. The commonly used honeycomb denitrification catalysts have 20 pores, 22 pores, and 25 pores.
