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Discussion Starter · #1 ·
Ok guys, kinda a geek question, but I heard the black soot from diesel engines is heavy and just falls to the ground as coal rather than raising into the atmosphere like exhaust from a gasser. Anyone else here this?

If this is true, why do Diesels need all the EGR stuff, and DPFs and exhaust fluid? are there other things in diesel exhaust besides soot that are bad for the atmosphere?
 

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Im sure the "black" soot will fall to the ground eventually but there is alot more coming out of that pipe than just black soot...all the other burnt fuel contaminants are what will rise up and do the damage or whatever it does. On the flip side diesels ae probably no worse for the enivronment than a gasser but the problem is that it "looks" alot worse with all that black smoke so the greenies pee their pants about it. Gotta please the hippies and there cars that run on hopes and dreams. I am by no means an expert, just my thoughts....
 

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^I'm with this guy^ It "looks" bad, so it must be bad, right?
 

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it is worse when some jackazz puts a smoke switch on there truck. Or has such a dirty tune it blacks out an intersection, or all six lanes on the road! F#!kin idiots!
 

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Discussion Starter · #5 ·
It definitely dosent help when guy's trucks smoke a lot.

Im still curious about whether gas or diesel is more toxic when they undergo combustion. Do diesels have catalytic converters? I know my late model mustang has an EGR system, so that isn't unique to diesel. I did some research on wikipedia and it seems like the worst things in exhaust are oxides of nitrogen.
 

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From what I've got from a customer I did a service call for. He said to me that diesels emit less Co2 there for are less harmful to the earth, but on the flip side the soot produced harms our lungs and other stuff down here, so more harmful to us lol. But idk just my .02
 

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The other bad polutant is NOX ,nitrogen oxide, hence the dpf filters.
 

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The other bad polutant is NOX ,nitrogen oxide, hence the dpf filters.
DPF is not for NOx. DPF is for soot. The NOx catalyst is for NOx. You've got your NOx adsorber catalyst (in the downpipe), then the DPF Catalyst and then the actual DPF. The DPF catalyst is there to burn the extra fuel put in by the computer to clean out the DPF. The NOx adsorber is the primary reason we now have 15ppm ULSD.

On SCR trucks they inject the urea (DEF) as an additional NOx breakdown aid, but IIRC they still have the NOx adsorber.
 

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Diesel exhaust won't kill you-------------gassers will. Nuff Said.
 

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DPF is not for NOx. DPF is for soot. The NOx catalyst is for NOx. You've got your NOx adsorber catalyst (in the downpipe), then the DPF Catalyst and then the actual DPF. The DPF catalyst is there to burn the extra fuel put in by the computer to clean out the DPF. The NOx adsorber is the primary reason we now have 15ppm ULSD.

On SCR trucks they inject the urea (DEF) as an additional NOx breakdown aid, but IIRC they still have the NOx adsorber.
I was refering to our whole stock exhaust.
 

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At work, we run jet heaters on diesel,in a closed shop (breezy but closed). I don't notice any real problems as far as breathing or fatigue. Once, an idiot co-worker put gas in the one in my area (on accident) and I about passed out and felt all kinds of sick for the whole day. I was only around it for about 15min...crazy stuff that gas does to ya.
 

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CO2 is not dependant on the fuel type used, it is the product of oxidizing carbon and water is the product of oxidizing hydrogen. Hence oxidizing a hydro carbon to completion nets CO2 and H2O and NOx or Nitrogen Oxides are from oxidizing nitrogen at high temperatures. Problem comes with incomplete combustion producing things like CO and partial hydrocarbons, soot etc. In a gassoline powered car, there is a catalyitic converter to complete the combustion process and convert CO to CO2 along with other partial hydrocarbons if present.

If people trully think CO2 is a problem for the earth, they really need to do some research on the subject. CO2 is what plants use to grow and then give us oxygen in return. CO2 may in fact be a green house type of gas, but at the low level of aprox 350ppm in our atmosphere, contribute little to nothing in "global warming". The most abundant "greenhouse gas" is in fact water in the form of steam (what you can't see) and water vapour (what you CAN see such as clouds). Global warming/cooling is a natural cycle that includes the effects of many things that we aren't even aware of. Things such as hot cycles in the sun, volcanoes, vegitation abundance, relative humidity and probably a lot more than just those few things.

Is black diesel smoke bad? Yes it is for our health. Carbon dust in our lungs is by no means a good thing, but neither is silica (dust), gypsum (drywall dust), wood particulate (anyone ever use a skilsaw or a belt sander?), smoke (anyone actually smoke or have been around a campfire?), anyone ever smell a roof being tarred, a roadway being paved, fueling up a gassoline container of any kind? All these subject us to far more on a daily basis than our little diesel engines as the diesel emissions is quickly diluted with the surrounding air.

The products of incomplete combustion are more harmful to us than products of complete combustion and thus the modern day emissions BS on our diesel engines.

Having said all that, I have seen countless occurances of hydrocarbon releases into the environment and very few restrictions are put on the oil industry to curb these occurances. Some of these occurances are larger than my whole family history of hydrocarbon useage. Raw CH4 to the atmosphere is a common occurance in the oil industry. It's not suppose to happen, but happens very frequently.
 

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EARTH: The Operators' Manual : PBS

For everyone.

Yes, global warming and cooling is naturally occurring. CO2 levels historically rise and fall naturally, along with temperature. There is a direct correlation. What happens when we introduce excess CO2 into the atmosphere? Watch the video. Inform yourself.

Disclaimer: No implied stance. Don't get all worked up.
 
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