SCR Honeycomb Catalyst

SCR (Selective Catalytic Reduction) honeycomb catalyst is a type of emission control technology used in diesel engines to reduce the emissions of nitrogen oxides (NOx) by converting them into nitrogen and water vapor. It consists of a honeycomb-shaped structure made of ceramic or metallic material coated with a catalyst, typically composed of vanadium, tungsten, and titanium.

SCR honeycomb catalyst parameter

（1）Power industry catalyst

Main Composition：	V2Ó5/WO3/TiO2	Hole No：	16~25
Application Temp：	300~420℃	Denitration efficiency：	≥90%
Ammonia escape Rate：	＜3ppm	SO2 Conversion Rate：	＜0.75%
Chemical life：	＞24000h	Mechanical life：	＞10年
With uniform texture, high activity, high efficiency, low conversion rate and low activity attenuation, the denitration efficiency meets the industry requirements.

Index

Hole Quantity	16	17	18	19	20	21	22	23	24	25
Pitch/mm	9.2	8.65	8.27	7.75	7.42	7.05	6.75	6.4	6.15	5.9
Hole Dia/mm	8.1	7.5	7.27	6.75	6.52	6.2	5.92	5.55	5.3	5.1
Inner Dia/mm	1.1	1.15	1	1	0.9	0.85	0.83	0.85	0.85	0.8
Specific Surface Area m2/m3	368	385	418	433	463	486	509	521	542	566
Opening rate/%	74.65	72.25	76.11	73.10	75.57	75.34	75.39	72.42	71.91	72.25

（2）Cement industry catalyst

Main Composition：	V2Ó5（MoO3）/TiO2	Hole No：	8~13
Application Temp：	180~300℃	Denitration efficiency：	≥90%
Ammonia escape Rate：	＜5ppm	SO2 Conversion Rate：	＜0.75%
Low volume, high activity, low decay rate; Resistance to sulfur and alkali metal poisoning

Index

Hole Quantity	8	9	10	11	12	13
Pitch/mm	18.4	16.4	14.8	13.4	12.3	11.2
Hole Dia/mm	16.5	14.6	13.3	11.95	10.9	9.85
Inner Dia/mm	1.9	1.8	1.5	1.45	1.4	1.35
Specific Surface Area m2/m3	187	210	236	257	279	295
Opening rate/%	77.44	76.74	78.62	76.80	76.04	72.87

（3）Catalyst for waste incineration power generation industry

Main Composition：	V2Ó5（WO3）/TiO2	Hole No：	30~60
Application Temp：	160~300℃	Denitration efficiency：	≥90%
Ammonia escape Rate：	＜3ppm		/
Low temperature, sulfur resistance, water resistance and alkali metal pollution poisoning; High denitration efficiency

Index

Hole Quantity	30	35	40	45	50	60
Pitch/mm	4.95	4.24	3.71	3.3	2.97	2.48
Hole Dia/mm	4.35	3.69	3.21	2.8	2.52	2.08
Inner Dia/mm	0.6	0.55	0.5	0.5	0.45	0.4
Specific Surface Area m2/m3	696	803	913	1008	1120	1331
Opening rate/%	75.69	74.13	73.27	70.56	70.56	69.22

（4）Marine industry catalyst

Main Composition：	V2Ó5（WO3）/TiO2	Hole No：	30~60
Application Temp：	250~550℃	Denitration efficiency：	≥90%
Ammonia escape Rate：	＜10ppm	NO2 Conversion Rate：	≥80
Meet the operating conditions of low, medium and high-speed machines, with sulfur resistance, vibration resistance, high specific surface area and high denitration efficiency

Index

Hole Quantity	30	35	40	45	50	60
Pitch/mm	4.95	4.24	3.71	3.3	2.97	2.48
Hole Dia/mm	4.35	3.69	3.21	2.8	2.52	2.08
Inner Dia/mm	0.6	0.55	0.5	0.5	0.45	0.4
Specific Surface Area m2/m3	696	803	913	1008	1120	1331
Opening rate/%	75.69	74.13	73.27	70.56	70.56	69.22

How the SCR honeycomb catalyst works？

The SCR honeycomb catalyst works by injecting a reducing agent, usually aqueous urea solution, into the exhaust stream of the diesel engine. The exhaust gases then pass through the honeycomb structure coated with the catalyst, which reacts with the reducing agent to convert the NOx into nitrogen and water vapor. The converted gases are then released into the atmosphere.

SCR honeycomb catalyst application

SCR honeycomb catalysts are highly effective in reducing NOx emissions and are widely used in heavy-duty diesel engines, such as those used in trucks, buses, and off-road vehicles. They are also used in power plants and industrial processes where NOx emissions need to be controlled.

What factors affect the efficiency of SCR honeycomb catalysts？

The efficiency of SCR honeycomb catalysts can be affected by factors such as temperature, catalyst poisoning, and catalyst degradation. To maintain their effectiveness, regular maintenance and replacement of the catalyst may be necessary.