Emissions Study Finds Propane to be Safe Forklift Fuel

May 8, 2003
The study, which compares the emissions data of propane to compressed natural gas (CNG) or gasoline, shows propane forklifts, when properly fitted and operated, have very low emissions.

The Propane Education and Research Council (PERC) released the review, which indicated that forklifts, when fitted with approved closed loop controls and exhaust catalysts, had very low emissions that meet and exceed California Air Resource Board Large Spark Ignition (CARB LSI) standards.

The review also found propane delivers the highest energy efficiencies when compared to other fuel production life cycles.

"Eighty percent of class 4 and 5 internal combustion forklifts are fueled by propane," said Roy Willis, PERC president. "Yet the forklift market is plagued by reports that are misleading or contain conflicting data on the relative emissions benefits of various fuels. We believe this review sets the record straight. When forklift emissions data is compared accurately, propane delivers the highest efficiencies and remains one of the cleanest fuels available for industrial lift trucks."

Conducted by two independent alternative fuel vehicle (AFV) experts, the review, "Industrial Truck Emission Data Compared by Fuel," examined research findings from seven forklift emissions studies performed between 1990 and 2002. "Testing conditions are an integral part of research studies," said William McGlinchey, one of the review's authors. "Our review has found that previous research studies often did not use the same fuel delivery system and engine; elements that are crucial for accurate comparative studies."

The authors examined two studies that used a Life Cycle Analysis (LCA) emissions model to assess the emissions impact of "upstream" production of a given fuel. The model estimates upstream and total fuel cycle energy consumption, greenhouse gases, and emissions for both short-and long-term scenarios. The model describes upstream emissions as the emissions emanating from pre-consumer fuel processing from feedstock to the gas station dispenser.

The review found when propane is compared accurately to CNG or gasoline, differences in industrial truck tailpipe emissions are negligible. In addition, the review revealed the most recent substantive comparison of gasoline and propane, a 2002 study conducted by Southwest Research Institute on behalf of CARB, found that emissions results meeting CARB LSI standards for large spark-ignited industrial trucks could be obtained using propane and a properly operating control system and exhaust catalyst.

The review emphasizes the role that regular maintenance plays in fuel control system performance and emissions reduction. "Our next step is to support the training and maintenance needs of propane-powered forklift operators," said Willis. "PERC has funded programs to ensure that propane-powered forklift operators receive the support they need to comply with emissions standards and achieve greater return on their investments."

Sponsored Recommendations

ISO 45001: Occupational Health and Safety Management Systems (OHSMS)

March 28, 2024
ISO 45001 certification – reduce your organizational risk and promote occupational health and safety (OHS) by working with SGS to achieve certification or migrate to the new standard...

Want to Verify your GHG Emissions Inventory?

March 28, 2024
With the increased focus on climate change, measuring your organization’s carbon footprint is an important first action step. Our Green House Gas (GHG) verification services provide...

Download Free ESG White Paper

March 28, 2024
The Rise and Challenges of ESG – Your Journey to Enhanced Sustainability, Brand and Investor Potential

Free Webinar: Mining & ESG: The Sustainability Mandate

March 28, 2024
Participants in this webinar will understand the business drivers and challenges of ESG and sustainability performance, the 5 steps of the ESG and sustainability cycle, and prioritized...

Voice your opinion!

To join the conversation, and become an exclusive member of EHS Today, create an account today!