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Science Forum Index » Chemistry Forum » Venting of hydrogen to atmosphere
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| Vivek Thakur |
 Posted: Tue Apr 29, 2008 7:44 am |
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Dear All,
At commercial scale, hydrogenation is being done at 3 bar(g) in a
vessel of 2 m3 which is half filled. After reaction, hydrogen is
vented outside to atmosphere. what is correct procedure for venting:
1. by dipping the vent in a vessel filled with water? How does water
help in avoiding hazards?
2. venting through a flame arrester? How to design it and what should
be the height of vent from nearby ignition source?
Though H2 has very low density and escapes very fast but there are lot
of incidents where H2 was involved. |
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| dlzc |
| Posted: Tue Apr 29, 2008 10:00 am |
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Dear Vivek Thakur:
On Apr 29, 10:44 am, Vivek Thakur <vivekthaku...@gmail.com> wrote:
Quote: Dear All,
At commercial scale, hydrogenation is being done at
3 bar(g) in a vessel of 2 m3 which is half filled.
After reaction, hydrogen is vented outside to
atmosphere. what is correct procedure for venting:
....
2. venting through a flame arrester? How to design
it and what should be the height of vent from nearby
ignition source?
Electrocatalytic production of activated chlorine species from brine,
involves incidental production of hydrogen gas. These systems are
installed on oil production platforms, where the explosion hazard is
quite high. I would recommend discussing your need with professionals
that do this.
http://www.water.siemens.com/en/Product_Lines/Electrocatalytic_Products/Pages/default.aspx
It is a shame that you cannot scrub it and reuse it. Or simply pass
it through a natural gas flame to convert it to water.
David A. Smith |
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| Ron Jones |
| Posted: Tue Apr 29, 2008 1:42 pm |
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Guest
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Vivek Thakur wrote:
Quote: Dear All,
At commercial scale, hydrogenation is being done at 3 bar(g) in a
vessel of 2 m3 which is half filled. After reaction, hydrogen is
vented outside to atmosphere. what is correct procedure for venting:
1. by dipping the vent in a vessel filled with water? How does water
help in avoiding hazards?
2. venting through a flame arrester? How to design it and what should
be the height of vent from nearby ignition source?
Though H2 has very low density and escapes very fast but there are lot
of incidents where H2 was involved.
I've used plant where the vent was always through a flame arrester located
well above the building roof to ensure maximim dilution of the hydrogen gas
(need to get below 2% in air to be non-flammable), without any possiblility
of any flash back.
--
Ron Jones
Process Safety & Development Specialist
Don't repeat history, unreported chemical lab/plant near misses at
http://www.crhf.org.uk Only two things are certain: The universe and
human stupidity; and I'm not certain about the universe. ~ Albert
Einstein |
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| Vivek Thakur |
| Posted: Thu May 01, 2008 7:57 am |
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| Does anyone can reply my queries? |
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| N:dlzc D:aol T:com (dlzc) |
| Posted: Thu May 01, 2008 9:41 pm |
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Guest
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"Vivek Thakur" <vivekthakur01@gmail.com> wrote in message
news:aac300f8-dccb-49f5-bcea-ec162ab13b29@y18g2000pre.googlegroups.com...
Quote: Does anyone can reply my queries?
Yes. Read the newsgroup.
David A. Smith |
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