Navigation Links
Clean fuel worsens climate impacts for some vehicle engines: UBC study
Date:3/1/2011

A pioneering program by one of the world's largest cities to switch its vehicle fleet to clean fuel has not significantly improved harmful vehicle emissions in more than 5,000 vehicles and worsened some vehicles' climate impacts a new University of British Columbia study finds.

The study which explores the impacts of New Delhi, India's 2003 conversion of 90,000 buses, taxis and auto-rickshaws to compressed natural gas (CNG), a well-known "clean" fuel provides crucial information for other cities considering similar projects.

Of the city's more than 5,000 auto-rickshaws with two-stroke engines a common form of transportation in Asia and Africa the study found that CNG produced only minor reductions in emissions that cause air pollution and an increase in emissions that negatively impact climate change.

According to the researchers, the New Delhi's program could have achieved greater emission reductions at a cheaper price by simply upgrading two-stroke models to the cleaner, more fuel-efficient four-stroke variety.

"Our study demonstrates the importance of engine type when adopting clean fuels," says lead author and UBC post-doctoral fellow Conor Reynolds. "Despite switching to CNG, two-stroke engine auto-rickshaws in Delhi still produce similar levels of particulate matter per kilogram of fuel to a diesel bus and their climate impacts are worse than before."

Published online in the journal Environmental Science and Technology, the study is the first to comprehensively examine the pollutant emissions from small vehicle engines fuelled with CNG. It included significant laboratory testing of Indian auto-rickshaws.

The study finds that as much as one third of CNG is not properly burned in two-stroke engines, producing high emissions of methane, a major greenhouse gas that contributes to climate change. CNG use also produced substantial emissions of high particulate matter from unburned lubricating oil, which can appear as blue smoke.

The findings show the importance of strong scientific data for policymakers and the need to consider small vehicles like auto-rickshaws in emissions reduction programs, according to the researchers.

"If policymakers have information about emissions and their potential impacts, they can make better decisions to serve both the public and the environment," says Reynolds, who co-authored the study with Prof. Milind Kandlikar and post-doctoral fellow Andrew Grieshop from UBC's Liu Institute for Global Issues and Institute for Resources, Environment and Sustainability.

According to the researchers, the study has broad implications for the design of public health interventions.

"Clean fuels are being used in Indian cities for transportation when they could save many more lives if used for cooking," says Kandlikar. "The interests of the rural poor, particularly women and children, are being put below those of the urban consumer."

According to the researchers, several Asian cities have more two-stroke auto-rickshaws than New Delhi. They say the study provides important information to other cities considering fuel-switching programs, especially those in rapidly industrializing cities in India, Pakistan, Bangladesh, Philippines, Thailand, and Indonesia, where major auto-rickshaw fleets exist.


'/>"/>

Contact: Basil Waugh
basil.waugh@ubc.ca
604-822-2048
University of British Columbia
Source:Eurekalert

Related biology technology :

1. Purifying nanorods: Big success with tiny cleanup
2. Millstone Medical Outsourcing Acquires New Facility to Accommodate Growing Business, Provide Additional Clean Room Capacity
3. SRNLs microbes useful for for environmental cleanup and oil recovery
4. TechConnect World 2009 Matches Tomorrows Technology Solutions with Todays Business Needs for Clean-Technology, Biotechnology and Nanotechnology
5. The Elmasonic S Ultrasonic Cleaner: Designed for the Scientific Laboratory
6. San Diego universities, government and industry rally around local Clean-Tech cluster
7. China Clean Energy Resumes Biodiesel Production After Temporary Halt
8. White Paper Details How DNA Sequencing Services Can Prevent Cleanroom Shutdowns at Medical Device and Pharmaceutical Manufacturers
9. Photo-catalytic, self cleaning coating for building exteriors
10. DAZ Systems, Inc. Thrives in the Clean Energy Industry
11. ASP Announces Availability of EVOTECH(TM) Endoscope Cleaner and Reprocessor - First Commercially Available System to Eliminate Manual Cleaning of Endoscopes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2016)... , June 23, 2016 A person commits ... the crime scene to track the criminal down. ... U.S. Food and Drug Administration (FDA) uses DNA evidence to ... Sound far-fetched? It,s not. The FDA has ... to support investigations of foodborne illnesses. Put as simply as ...
(Date:6/23/2016)... FRANCISCO , June 23, 2016   EpiBiome ... has secured $1 million in debt financing from Silicon ... ramp up automation and to advance its drug development ... its new facility. "SVB has been an ... beyond the services a traditional bank would provide," said ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... line of intelligent tools designed, tuned and optimized exclusively for Okuma CNC machining ... Chicago. The result of a collaboration among several companies with expertise in toolholding, ...
Breaking Biology Technology:
(Date:6/21/2016)... VANCOUVER, British Columbia , June 21, 2016 ... been appointed to the new role of principal ... has been named the director of customer development. ... , NuData,s chief technical officer. The moves reflect ... development teams in response to high customer demand ...
(Date:6/16/2016)... 2016 The global ... reach USD 1.83 billion by 2024, according to ... Technological proliferation and increasing demand in commercial buildings, ... drive the market growth.      (Logo: ... development of advanced multimodal techniques for biometric authentication ...
(Date:6/9/2016)... control systems is proud to announce the introduction of fingerprint attendance control software, allowing ... are actually signing in, and to even control the opening of doors. ... ... ... Photo - http://photos.prnewswire.com/prnh/20160609/377487 ...
Breaking Biology News(10 mins):