What if you could produce ultra-low-sulfur diesel fuel while actually decreasing greenhouse gas impact?

A new study from Praxair shows that the reduction in greenhouse gas emissions enabled by ultra-low-sulfur-diesel (ULSD), used with diesel particulate filters, is 15 times greater than the greenhouse gases emitted in making hydrogen required for ULSD.

» The use of hydrogen to produce ULSD, together with a diesel particulate filter, enables a 16.2% reduction in greenhouse gases tailpipe emissions. » Total greenhouse gases reductions enabled by Praxair's hydrogen used in the production of ULSD, when used with diesel particulate filters, more than offsets Praxair's total direct greenhouse gases emissions.

WHITE PAPERS The Role of Hydrogen in Minimizing Black Carbon Emissions from Diesel Engines by Dante P. Bonaquist and Riva Krut, Praxair, Inc. (PDF=1.87MB) CO2 Emissions Reductions and Capture at Large-Scale Hydrogen Production Plants by Dante P. Bonaquist, Praxair, Inc. (PDF=1.57MB) Dante Bonaquist As a Praxair senior corporate fellow and chief scientist, Dante directs hydrogen and energy technology, and ceramic membrane development programs. (View video)

Praxair's total direct greenhouse gas emissions from hydrogen plants is more than offset by the potential greenhouse gas reductions enabled by the hydrogen.

Praxair Supplied Hydrogen 20% to 60% of hydrogen supplied by Praxair goes to refinery hydrotreating. Hydrogen performs a critical role in this process: » Carbon dioxide emissions in producing hydrogen: 129 grams per gallon of diesel fuel.

Refinery Hydrotreating Hydrogen enables the production of ULSD.

Diesel Black Carbon Reduction The use of hydrogen to produce ULSD enables a 16.2% reduction in greenhouse gases tailpipe emissions. » Untreated diesel fuel carbon dioxide emissions: 12,042.6 grams per gallon. » The use of diesel particulate filter significantly lowers black carbon emissions. » Reduction in carbon dioxide emissions: 1,951.2 grams per gallon.

A Win/Win for the Planet » The reduction in greenhouse gases enabled by hydrogen in ULSD, used with diesel particulate filters, is 15 times greater than the greenhouse gases emitted to produce the hydrogen. » The greenhouse gases avoided from Praxair hydrogen used to make ULSD, together with the diesel particulate filter, more than offset Praxair's total direct greenhouse gases emissions.