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JAMA’s Position on Sulfur Reduction

JAMA’s Position on Sulfur Reduction. Jan. 10, 2003. Japan Automobile Manufactures Association. JAMA’s Stance. JAMA strongly supports this activity to achieve clean air through improving fuel quality.

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JAMA’s Position on Sulfur Reduction

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  1. JAMA’s Position on Sulfur Reduction Jan. 10, 2003 Japan Automobile Manufactures Association

  2. JAMA’s Stance • JAMA strongly supports this activity to achieve clean air through improving fuel quality. • Improving fuel quality is essential in order to introduce lower emission vehicles equipped advanced after treatment technology such as 3WAY catalyst and CRDPF, and EGR system etc. • Especially, eliminating lead from gasoline and lowering sulfur in gasoline and diesel fuel are the most important issue. • Ash forming octane booster should not be allowed.

  3. LEV1-LEV LEV1-LEV LEV1-LEV LEV1-LEV LEV2 ULEV LEV2 ULEV SULEV SULEV 150 150 SULEV 100 SULEV 100 Relative THC (based on 30/40ppm sulfur) Relative NOx (based on 30/40ppm sulfur) 50 50 LEV,ULEV LEV,ULEV 0 0 -50 -50 0 100 200 300 400 500 600 0 100 200 300 400 500 600 Sulfur(ppmw) Sulfur(ppmw) Sulfur impact on Emissions Lowering sulfur in gasoline leads to lowering exhaust emissions from the all vehicles equipped three way catalyst systems.

  4. 100 80 60 NOx conversion (%) ＠#10-15mode Sulfur 8 ppm 40 : 30 ppm : 90 ppm : 20 200 ppm : 500 ppm : 0 0 16000 32000 mileage (km) Sulfur impact on Emissions Sulfur effects on NOx catalyst performance is significant. Sulfur free is essential to introduce this kind of system that achieves low emissions and low fuel economy (low CO2).

  5. Drysoot+H2O Drysoot+H2O Sulfate Sulfate SOF SOF Sulfur impact on Emissions Fuel sulfur has also effects of PM from the engine installed CRDPF system. 0.500 Japanese D13 mode 100ppm 0.400 0.300 PM, g/kWh 50ppm 0.200 10ppm 0.100 0.000 0.500 100ppm JARI test cycle 0.400 0.300 50ppm PM, g/kWh 0.200 10ppm 0.100 0.000 0 30000 0 30000 0 30000 Mileage (km)

  6. Other impact of Sulfur • Fuel sulfur promotes to produce sulfated ash on the DPF and then plugged it. This caused detelioration of fuel economy and lowering engine durability. • Fuel sulfur increases cylinder bore wear in the engine equipped EGR system to reduce NOx and shortens engine durability. • When fuel sulfur in diesel fuel was reduced, lubricty is also lowered at the same time. This causes fuel pump wear. Lubricity improver should be added as fuel sulfur was reduced. • Lowering sulfur reduces SOx emissions that is a cause of acid rain.

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