×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

NOx reduction

NOx reduction

NOx reduction

(OP)
I am wondering if anyone has any experience or knowledge on the low temperature oxidation of NO to N2O5.  The technology is trademarked as LoTOx.

I have looked at SNCR and SCR in the past and found a lot of material in journals and online.  However, with LoTOx I seem to be hitting a dead end.  

I am looking for information relating to disadvantages or limitations with the system.  Is ozone too expensive?  Is it limited by the NOx levels entering the unit?

The best information I have is done by BOC.

Cheers

RE: NOx reduction

Our site is looking into the LoTox Technology for NOx reduction. Our NOx is generated both by HNO3 manufacturing and an HNO3 oxidation of organics.
The site currently uses thermal and modified SCR, both very expensive to operate.

I called the person responsible for the evaluation and was told that he has take a position in technical sales, smart move. The person filling in didn't know anything as he hasn't done his own evaluation, they didn't seem too enthusiastic about the new project.

You might want to checkout this source.
 
http://www.belcotech.com/products/nox.html

RE: NOx reduction

You can use hydrogen peroxide for low temperature oxidation of NOx to nitric acid.  The reaction in aqueous solution is
   HNO2 + H2O2 -> HNO3 + H2O

The hydrogen peroxide can be added directly to nitric acid pickling solutions to prevent the escape of the nasty reddish NOx fumes, plus it regenerates some nitric.
Or, it can be used on cooled flue gases, as nitric is more easily scrubbed than NOx.

The limitation is that hydrogen peroxide has a relatively short life (self-decomposes) above about 50oC.

RE: NOx reduction

(OP)
The LoTOx system I was looking at was ozone and not hydrogen peroxide, although I'm sure there are different types.

I am curious as to why I have not seen more information on LTO.  In our application now we have fairly low NOx already and we do not need a wet scrubber, so I would suspect that a system such as SNCR would work best for us.  But I am having trouble convincing people without any information on LTO.

RE: NOx reduction

I have also difficulties to find information. However, it seems that from this page you can order some information (LoTOx is the last thing at the bottom of the page).

http://www.belcotech.com/techlib/index.html

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources