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Transportation & Fuel Source Technology


City of Dallas First in the Nation to Use NOx-Cutting Biodiesel Additive


Building on efforts to expand the use of clean and renewable energy, the City of Dallas has started running much of its fleet on biodiesel, an alternative fuel made mostly from vegetable oil. The City of Dallas is taking it a step further by becoming the first fleet in the nation to utilize a new biodiesel additive that reduces NOx (oxides of nitrogen) emissions, one of the primary causes of the ozone pollution problem in North Texas. The additive, ORYXE LED for Biodiesel, recently received approval from the Texas Commission on Environmental Quality (TCEQ).

The ORYXE Energy additive is blended with B20 biodiesel, which is a mix of 20% biodiesel and 80% petroleum diesel. The City of Dallas is fueling several hundred vehicles with the new biodiesel blend, including sanitation trucks, utility trucks and construction equipment. The city plans to use approximately 350,000 gallons of the biodiesel per year.

When compared to petroleum diesel, Environmental Protection Agency (EPA) data shows that biodiesel reduces most harmful emissions, but increases NOx. TCEQ supervised testing shows the ORYXE Energy technology cuts NOx to a level that is acceptable for biodiesel to meet state air-quality standards.

"The City of Dallas is constantly striving to be at the forefront of clean technology, and we hope our example will lead to other large diesel fleets using this cleaner fuel blend," says Ramiro Lopez, who oversees fuel and environmental services for the Department of Equipment and Building Services. "With NOx being such a big issue in the Metroplex, we waited for this technology to become available so we could reintroduce biodiesel into our fleet."

"This isn't the first time the City of Dallas has taken the lead on new environmental technology," says James M. Cleary, ORYXE Energy chairman and chief executive officer. "The growing use of biodiesel is exciting, and ORYXE Energy is fortunate to offer a solution that addresses the concerns of increased NOx emissions from biodiesel."

"North Texas air quality will continue to improve with efforts like this by the City of Dallas," says Ramiro Lopez. "This program also provides an opportunity to further enhance the commitment by our city council and city management to reduce emissions in the region."

Tests on ORYXE LED for Biodiesel followed strict federal test procedures, which are mandated by the TCEQ, and were conducted at West Virginia University Engine and Emissions Research Laboratory. The B20 fuel treated with the ORYXE additive showed equivalent NOx levels to Texas Low Emission Diesel (TxLED) fuel (5.7% lower than standard EPA petroleum diesel). In addition to reducing NOx, the biodiesel blend with ORYXE Energy technology also reduced particulate matter (PM) by 28.8%, total hydrocarbons (THC) by 17.5% and carbon monoxide (CO) by 19% beyond the required TxLED levels.

ORYXE Energy can deliver the biodiesel additive from its manufacturing facility near Houston to anywhere in Texas for just pennies per gallon of fuel.

"In addition to being stewards of the environment, we're also stewards of the taxpayers' dollars," says Lopez. "The ORYXE Energy technology not only allows us to do our part to clean up the air, but also be cost effective in doing it."





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