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TDI (Diesel) Emissions This is a discussion about emissions from TDI's. Pro's cons of Diesels (including biodiesel) effects on the environment and how they compare to Gasoline and other fuel sources for Internal combustion engines.

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Old July 14th, 2017, 17:03   #1
TDIMeister
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Default Study: Modern diesel cars emit fewer carbonaceous particulates than gasoline cars

Study finds modern diesel cars emit fewer carbonaceous particulates than gasoline cars

A new study by an international team led by researchers from the Paul Scherrer Institute (PSI) in Switzerland has found that modern diesel passenger cars equipped with diesel particulate filters (DPFs) emit fewer carbonaceous particulates than gasoline-powered vehicles. The open-access study is published in the journal Scientific Reports.

...

They found that emissions from new gasoline cars (both EU and US) produce up to 6.5 times more SOA than POA after 5–10 hours of atmospheric aging. New diesel cars produced no detectable SOA, contrasting with old diesels, for which SOA production is about equal to emitted POA.
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Old July 15th, 2017, 07:08   #2
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FAKE NEWS!! :d
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Old July 15th, 2017, 08:49   #3
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Why do you say that? This conclusion seems pretty obvious from here . . .
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Old July 15th, 2017, 09:19   #4
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In a related story: "Toothless dogs cause fewer bites than dogs with teeth."
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Old July 15th, 2017, 10:14   #5
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This is another in a series of studies which support the premise that gasoline engine exhaust is largely responsible for SOA production in urban locations, and that exhaust from newer diesel vehicles is largely passive with respect to SOA precursors. Here are several other studies concluding that premise just over the past 5 years or so:


Bahreini, R., et al., "Gasoline emissions dominate over diesel in formation of secondary organic aerosol mass." Geophys. Res. Lett. (2012)

Nordin, et al., "Secondary Organic Aerosol Formation From Gasoline Passenger Vehicle Emissions Investigated in a Smog Chamber." Atmospheric Chemistry and Physics Discussion, 12, 31725-31765, (2012)

Gordon, et al., "Secondary organic aerosol formation exceeds primary particulate matter emissions for light-duty gasoline vehicles." Atmospheric Chemistry and Physics. 09/2013; 13(9):23173-23216

May et al., "Gas- and particle-phase primary emissions from in-use, on-road gasoline and diesel vehicles." Atmospheric Environment, Volume 88, May 2014, Pages 247-260

18th ETH Conference on Combustion Generated Nanoparticles, June 2014

Yunliang Zhao et al. (2016), "Intermediate Volatility Organic Compound Emissions from On-Road Gasoline Vehicles and Small Off-Road Gasoline Engines" Environmental Science & Technology

Gentner et al. "Review of Urban Secondary Organic Aerosol Formation from Gasoline and Diesel Motor Vehicle Emissions." Environ. Sci. Technol., 2017, 51 (3), pp 1074-1093

Yunliang Zhao et al. "Reducing secondary organic aerosol formation from gasoline vehicle exhaust." Proceedings of the National Academy of Sciences, May 2017


Regulators really need to start focusing more on NMOG/VOC emissions than NOx.
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Old July 15th, 2017, 10:23   #6
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Quote:
Originally Posted by tadawson View Post
Why do you say that? This conclusion seems pretty obvious from here . . .
I was being sarcastic! Sorry.

But, flee got it.

Particulate filters for gas engines will be another cost push towards electric cars.
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Old July 15th, 2017, 10:38   #7
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I'm very much in favour of forcing particulate filters in any kind of combustion engine, Diesel or otherwise.
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Old July 28th, 2017, 04:32   #8
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The only problem with a study such as mentioned above is that the regulators refuse to let facts get in the way of their own prejudices. They prefer to generate facts and only regard that such as demonize their enemies and support their friends.

This is just a verbose way of saying EPA, CARB, and such are not interested in the integrity their jobs should require.

Oh, well.

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Old July 28th, 2017, 06:59   #9
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Quote:
Originally Posted by TDIMeister View Post
I'm very much in favour of forcing particulate filters in any kind of combustion engine, Diesel or otherwise.
And I'm very much in favor of throwing over zealous regulators into volcanoes . . . Some regulation is good, too much is rarely better . . . :-) :-)
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Old July 28th, 2017, 08:48   #10
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Quote:
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Regulators really need to start focusing more on NMOG/VOC emissions than NOx.
Agree 100%. Well said.

I will GLADLY take high NOx levels from an emissions cheating CR TDI while having significantly LOWER emissions in all other regulated emissions categories compared to any gasser.

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Why DIESEL is better:
http://webpages.charter.net/lmarz/emissions.html
http://webpages.charter.net/lmarz/efficiency.html
http://webpages.charter.net/lmarz/performance.html
http://webpages.charter.net/lmarz/emissions2014.html
http://webpages.charter.net/lmarz/emissions2016.html
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