Dimethyl Ether Buses in Shanghai
21 November 2004
Shanghai Daily. Researchers at Shanghai Jiao Tong University are developing a city transit bus that uses dimethyl ether (DME) as a fuel.
DME is a clean-burning (completely sootless) synthetic fuel that can substitute for conventional diesel, liquefied petroleum gas (LPG) or be reformed into hydrogen for fuel cells. As a diesel fuel replacement it reduces NOx emissions 90% and features high cetane. A cetane number marks the ignition quality of a diesel fuel by measuring the delay between the start of injection and combustion. A high cetane number has a shorter delay period and is more desirable. (Earlier post) Part of the interest in DME stems from the ability to produce it from a number of feedstocks: coal, natural gas, biomass. It is of particular interest to countries such as Japan and China.
“The new model is absolutely a significant reform for the city’s public transport industry,” said Huang Zhen, vice dean at the college, adding that the new fuel is cleaner than oil, safer than natural gas and more convenient than hydrogen.
The first DME bus model is still in production, and will be deployed on a trial basis in the first quarter of next year. The Ministry of Science will offer subsidies to produce 30 such buses in Shandong Province in two years.
There are more than 18,000 buses in service in Shanghai, of which only about 145 run on CNG.
The Center for Combustion and Environmental Technology (CCET) at Jiao Tong University is very active in multiple aspects of DME research.
"Part of the interest in DME stems from the ability to produce it from a number of feedstocks: coal, natural gas, biomass."
I think Dimethyl Ether is scary just because it opens up for coal use in transportation, which means that we can go on emitting carbondioxide even after we have used up all oil and natural gas reserves.
Posted by: Johan Erlandsson | 22 November 2004 at 01:20 AM
Using DME as a portable fuel will result in less air pollution. In diesel engines it reduces NOx 84%, CO 50%, hydrocarbons 75%, and soot emissions 100%. Modern coal gassification will use oxygen instead of air to reduce NOx emissions. Carbon dioxide, sulfur, mercury, and ash will all be captured and stored. The only carbon getting out of the plant will be that in the DME.
Even after we have transitioned to nuclear He3 fusion sources we will still need an environmentally clean fuel for transportation, cooking, and heating. For my money DME is that fuel.
Posted by: Mr Bill | 09 April 2005 at 09:09 AM
2 moles of methane produce 1 mole DME
I counted the Net Cash Recovery
((product price-raw material price)/raw material price))
and the result is 2,4.
Is it economically feasible?
Or it's just 'environmentally-feasible'?
I'm a student, looking forward for an aswer to my curiousity (by e-mail)
Thank You
Regards.
Posted by: Adi Wicaksono | 10 January 2006 at 08:50 PM
For more on DME visit our website. WWW.altfuetechnology.com
Posted by: Alternative Fuel Technology | 30 November 2006 at 12:59 PM
Hi, I'm working on a research project involving DME for ground transport use in Europe . . . is there any talk amongst the European governments for accepting this as a potential fuel source? Thanks! Leon K
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Posted by: biagra | 29 July 2007 at 04:10 AM
DME should be encouraged now that everyone is talking of greenhouse or save the enviroment. What are we waiting for. It is there, it has been developed. Let's go and push it. China, Japan or Canada can take the lead now. Ya.
Posted by: LAWRENCE YEO | 26 August 2007 at 10:20 PM
The whole wide world is looking at China to bring down the pollution. With the Olympic just around the corner, all countries should encourage China to take the lead to use DME. Countries that have made advanced research should now pool together and co-operate with China. With all countries talking about bring a greener world, this is one area that they should push. China can bing down the pollution by 75% with the use of DME on all their buses and motor vehicles and industries. Yes, now is the time for the whole wide world to show that they will give China the 100% support to bring down the gases, the pollution before the great even, the Olympic takes place in China.Yes the countries can work as a team, co-operate, and jell together for a greener, cleaner, pollution free world so that all evens can take place at the China Olympice, no need to pospone any events. China can take the lead now. Is the whole wide world just talking and paying lips service or take action and act as they have been urging everyone to co-operation. Now is the time, what better time to show that the world can work as a team in this aspect. The countries that shout the loudest should now act, provide the biggest and fastest aid and cooperation. This is team work for the whole wide world - one world. YA
Posted by: LAWRENCE YEO | 26 August 2007 at 11:16 PM
"I think Dimethyl Ether is scary just because it opens up for coal use in transportation, which means that we can go on emitting carbondioxide even after we have used up all oil and natural gas reserves."
Dude if you are still scared of industrial-CO2-release then get yourself a teddy-bear and a night-light. Because the fact is that the energy-deprivation-crusade is a fraudulent movement.
We live in a brutal and pulverising ice age. And if someone actually found some evidence for a little human-induced warming we ought to throw a worldwide street party.
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