[AT] Continuing "What to do"

[Cecil R Bearden]

Steve:
Thanks for explaining that to me...   Is is possible to turn the NOX 
into nitrate possibly by adding water and maybe fertilize the roadside 
where it is driven.?  This might also cause the particulate matter to 
wash out.

I have forgotten a lot of chemistry 2115 at OSU!!

Cecil in OKla


On 1/13/2016 7:31 AM, Stephen Offiler wrote:
> Cecil:
>
> (By the way I loved that rant on concrete and culverts!  I'm a mechanical
> engineer and I see similar "we've always done it this way" idiocy in my
> world every day)
>
> Different subject, see below...
>
>
> On Wed, Jan 13, 2016 at 7:44 AM, Cecil R Bearden <crbearden at copper.net>
> wrote:
>
>> That is what I read also.  However, the result is a less reliable engine
>> that uses more fuel.   How can you pollute less if the engine you are
>> operating has all this crap on it but uses twice the mount of fuel?
>
> Ask Volkswagen ;-)
>
> Seriously, the answer lies in the definition of "pollution".  One pollutant
> in particular is NOx.  A diesel engine inherently makes very high NOx
> emissions.  The chemical reaction to form NOx happens at high temperature
> and pressure, so, the more thermally efficient your diesel engine (the
> better the engine at converting heat into motion) then the more NOx it will
> emit.  The trick to emitting less NOx is to detune the engine, so it
> operates at lower temperatures and pressures.  It uses more fuel because
> you took away thermal efficiency.
>
> And then there's yet another form of pollution called particulate matter,
> PM.  Microscopic soot and ash, basically.  Modern diesels must be fitted
> with traps to capture PM.  And the traps tend to fill up.  The way to clean
> them is called a "regen" and it involves heating up the trap to a higher
> temperature to burn the soot down.   The extra heat comes from extra fuel.
> So there's another reason modern diesels use more fuel.
>
>
> Steve O.
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