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Old 07-11-2018, 01:36 PM   #1 (permalink)
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Urea injection in combustion chamber for reduced nox

Hi all,

I'm sure some of you have heard of urea injection, such a bluemotion or adblue. The idea being that you spray urea into the exhaust (typically in front of the catalytic converter) and that reduces nox output. But my knowledge is limited.

On my mechanical diesel that is running on vegetable oil, I already have water injection to help with carbon build up (it steam cleans the inside of your combustion chamber) and to cool intake air temps (slight power increase)

My idea being that I could just put some adblue fluid (its cheap) instead of my water. I'm not a total hippy but I do like the idea of reducing emissions if I can easily.

My question to you is will it work? And will the urea injection give me any other problems during combustion, as opposed to just water?

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Old 07-11-2018, 03:21 PM   #2 (permalink)
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Quote:
Originally Posted by ratgreen View Post
Hi all,

I'm sure some of you have heard of urea injection, such a bluemotion or adblue. The idea being that you spray urea into the exhaust (typically in front of the catalytic converter) and that reduces nox output. But my knowledge is limited.

On my mechanical diesel that is running on vegetable oil, I already have water injection to help with carbon build up (it steam cleans the inside of your combustion chamber) and to cool intake air temps (slight power increase)

My idea being that I could just put some adblue fluid (its cheap) instead of my water. I'm not a total hippy but I do like the idea of reducing emissions if I can easily.

My question to you is will it work? And will the urea injection give me any other problems during combustion, as opposed to just water?
Nitric acid can be corrosive take that out and it would work but it would work best direct injected late in the power stroke providing a small amount of power, cooling and reactants.

Maybe if the amount was very smal you could avoid its coorsive nature since it would be “all used up” before hitting the exhaust valve.

So, Interesting idea but it could erode engine components
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Old 07-11-2018, 03:31 PM   #3 (permalink)
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Originally Posted by rmay635703 View Post
Nitric acid can be corrosive take that out and it would work but it would work best direct injected late in the power stroke providing a small amount of power, cooling and reactants.

Maybe if the amount was very smal you could avoid its coorsive nature since it would be “all used up” before hitting the exhaust valve.

So, Interesting idea but it could erode engine components
Where would the nitric acid come from ? Chemistry was never my forte
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Old 07-11-2018, 04:47 PM   #4 (permalink)
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Regardless of the chemistry

Def itself is also corrosive

https://www.titan-cts.com/resources/faq/

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