DPF Diesel Particulate Filter Catalytic Converter

DPF Diesel Particulate Filter Catalytic Converter * DPF diesel particulate filter * Catalytic converter * Sic and cordierite DPF Diesel Particulate Filter Catalytic Converter: With increasing appearance of diesel engine automobile, the particulate from emission, mainly carbon, enhances the pollution to the environment.Regulation for diesel engine, stipulating the particulate in diesel passenger cars emission should meet the criterion: below 2.0g/mile. The diesel particulate filter is able to filter above 80% carbon smoke particulate .For practical application, it would be a great help to solve the problem of air pollution.If the DPF is coated with precious-metal (such as Pt, Pd and Rh), black smoke with carbon particulate from diesel engine pass through a special tube and enter the filter. The carbon smoke particulate is absorbed to the filter made of metallic fiber felt, when passing the inner dense set and bag-style filter. When particulate absorption reaches some degree, the tail burner would be ignited to burn automatically. In this case, the particulate absorbed been burned out and turned into nontoxic CO2 then discharge. The full device is designed as double room structure, and filtration and recycle are going in different areas, making them non-disturbed. The system can work automatically whatever working condition the engine in. especially made honeycomb ceramic particulate filter, acts as capturing device to the particulate to some extent. The particulate of emission is captured inside thin gas hole or entrance. As it lasts, the cumulated layer become thick, and pressure loss increase. To ensure the performance of engine, when pressure loss reaches some value, it is a must to recycle the filter. The recycle is making the particulate burning, by raising the gas temperature of filter.The particulate condition is related to the oxygen concentration. Normally, it is burning at 550-650 .Its adopted to raise emission temperature by adjusting throttle, and increase gas temperature with burner. The particulate burning temperature can be decreased by catalyzed, making cumulative particulate burning as soon as possible, thus recover the pressure loss and fitters performance, then the filter is recycled. Physical Properties:

Property (uncatalyzed)		100/17	200/12
Cell density	cpsi	100	200
	cpscm	15.5	31.0
Wall thickness	inch	0.017	0.012
	mm	0.432	0.305
Open frontal area (OFA), %		34.5	34.5
Geometric surface area (GSA)	Inch2	33.3	47.0
	m2/l	1.31	1.85
Hydraulic diameter	Inch	0.083	0.059
	mm	2.11	1.49
Modulus of rupture (psi/cpscm)		350	300
Porosity (%)		48	48
Coefficient of thermal expansion102 cm/cm/ (20-800) --maximum average		5	5
Mean pore size (micron)		13	13
Melting temperature ()		1460	1460

Normal used DPF substrate specification
				density	specification (mm)	VolumeL)
diametre(mm)	length(mm)	CPSI	volume(L)	100CPSI	φ127*152.4	1.9308
93	153	100	1.0394		φ144*150	2.4432
144	150	100,200	2.4432		φ144*152.4	2.4823
144	152.4	100,200	2.4823		φ144*254	4.1372
144	254	100	4.1372		φ150*150	2.6511
150	150	100	2.6511		φ190*200	5.6713
190	200	100,200	5.6713		φ190*203	5.7564
190	305		8.6487		φ228*305	12.4542
228	308	100	12.5767		φ240*100	4.5245
240	305	100	13.7997		φ240*240	10.8588
260	305	100	16.1954		φ240*305	13.7997
267	305	100	17.0792		φ260*305	16.1954
286	305	100	19.5965		φ267*305	17.0792
286	381	100	24.4795		φ286*267	17.1550
					φ286*305	19.5965
					φ286*355	22.8090
					φ286*381	24.4795
					φ188*103*145	2.2055
					racetrack	0.0000
					φ374*270*317	27.0537
				200CPSI	φ144*150	2.4432
					φ144*152.4	2.4823
					φ144*254	4.1372
					φ190*200	5.6713
					φ228*305	12.4542
					φ260*305	16.1954
					φ267*305	17.0792
					φ286*305	19.5965

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DPF Diesel Particulate Filter Catalytic Converter