Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > General Science Forums > Chemistry Forum
Register Search Today's Posts Mark Forums Read

Chemistry Forum Chemistry Forum. Discuss chemical reactions, chemistry.

Half life of N2?

Half life of N2? - Chemistry Forum

Half life of N2? - Chemistry Forum. Discuss chemical reactions, chemistry.

LinkBack Thread Tools Display Modes
Old 10-21-2003, 05:54 AM
Jacobe Hazzard
Posts: n/a
Default Half life of N2?

I use an ozone generator to control the population of mold spores in a clean
environment. I constructed it myself, basically it's a pyrex tube wrapped in
conducting foil with a conducting wire mesh rolled inside. A very high
alternating voltage is imposed across the foil and mesh, and air is forced
through the tube, dispersing large amounts of ozone into the room.

I have been told that high voltage ozone generators run in plain air
environments also generate unstable N2 molecules, a known carcinogen. Can
anyone comment as to the truth of this statement? If true, then what is the
half-life of N2?

Chemistry is not my strongest skill, I just want to make sure the
sanitization procedure is safe. No-one is present in the room while it is
being ozonated, and I need to know the minimum time before the room becomes
safe to inhabit again (I believe the half-life of ozone is roughly 1/2 hour,
I have been allowing a minimum of 2 hours for decay.).



Reply With Quote
Old 10-21-2003, 02:23 PM
dlzc@aol.com \(formerly\)
Posts: n/a
Default Half life of N2?

Dear Jacobe Hazzard:

"Jacobe Hazzard" <[Only registered users see links. ]> wrote in
news:FS3lb.220972$[Only registered users see links. ].net.c able.rogers.com...

Your leg has been stretched. In ozone generation in other than pure oxygen
(which isn't very efficient), NO2, N2O, and N2O5 have been noted to be
produced. How much is a function of the amount of moisture in your feed
gas stream (plus a few other things).

Some of these are stable.


Run your generator on oxygen feed, and vent the room (so you don't build up
too much oxygen in the room). Don't let the ozone generator sit in the
room, as the ozone will age it.

Be sure you check the atmospheric ozone level with instrumentation. The
halflife of ozone is a function of room contents, temperature, and

David A. Smith

Reply With Quote
Old 10-23-2003, 12:45 AM
William Penrose
Posts: n/a
Default Half life of N2?

On Tue, 21 Oct 2003 07:23:52 -0700, "[Only registered users see links. ] \(formerly\)"
<dlzc1.cox@net> wrote:

Good advice. A room with a lot of organic material in it will degrade
ozone quickly. An empty room may not.

A sufficiently sensitive ozone analyzer will set you back a few
dollars. Your nose is a sensitive indicator. Or rather your throat,
which becomes irritated before you can smell the gas.

Keeping the overall ozone low, around 10 ppm, will accomplish the
purpose and disappear very quickly.

Bill Penrose
Reply With Quote
Old 10-23-2003, 06:34 PM
Marvin Margoshes
Posts: n/a
Default Half life of N2?

"William Penrose" <[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ]...

Your nose will stop sensing ozone after a short time, so it is not a
reliable sensor. Depending on your throat becoming irritated means you are
waiting for damage to happen.

Reply With Quote

half , life

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Breakthrough in Cosmology Kazmer Ujvarosy Botany Forum 0 05-21-2004 06:50 AM
Breakthrough in Cosmology Kazmer Ujvarosy Forum Biologie 0 05-21-2004 06:32 AM
Physics and Life - by Paul Davies Laurent Physics Forum 6 01-15-2004 04:17 PM

All times are GMT. The time now is 02:30 AM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.13884 seconds with 16 queries