Previous in Forum: Handling H2SO4   Next in Forum: Measuring volume of bulk chemicals
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
9 comments
Rate Comments: Nested
surmil
Associate

Join Date: Dec 2007
Posts: 29
Good Answers: 1

Hydrogen Peroxide from Solar PV Route

04/25/2008 8:28 AM

What are the possibilities of generating small quantities of hydrogen peroxide being made by solar PV devices, for meeting on line needs for disinfecting water born pathogens?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Keith E Bowers
Power-User

Join Date: Jan 2007
Location: Houston,Texas
Posts: 378
Good Answers: 24
#1

Re: Hydrogen Peroxide from Solar PV Route

04/26/2008 9:07 AM

It is not easy to make H2O2. Much easier to make ozone or use UV lamp.

__________________
 Keith E Bowers, PMP
Register to Reply
surmil
Associate

Join Date: Dec 2007
Posts: 29
Good Answers: 1
#2
In reply to #1

Re: Hydrogen Peroxide from Solar PV Route

04/26/2008 9:13 AM

Low voltage electrolysis path should be easier with Solar PV than with Ozone generation. I have no knowledge about relative merits of ozone or hydrogen peroxide paths. What ever is easy to maintain operate will be fine.
Register to Reply
Tad
Power-User

Join Date: Dec 2006
Posts: 442
Good Answers: 32
#3

Re: Hydrogen Peroxide from Solar PV Route

04/26/2008 9:53 AM

It's possible, but not straight forward. Why not generate sodium hypochlorite (bleach) from saltwater?

Tad
Register to Reply
Sciesis2
Guru
Hobbies - HAM Radio - New Member

Join Date: Oct 2006
Location: Vancouver (not BC) Washington (not DC) US of A
Posts: 1261
Good Answers: 12
#4
In reply to #3

Re: Hydrogen Peroxide from Solar PV Route

04/26/2008 1:41 PM

Why not generate sodium hypochlorite (bleach) from saltwater?

Just out of curiousity, Tad, how might one go about doing this? It sounds interesting.

Bill
Register to Reply
surmil
Associate

Join Date: Dec 2007
Posts: 29
Good Answers: 1
#5
In reply to #4

Re: Hydrogen Peroxide from Solar PV Route

04/26/2008 8:35 PM

Would like to pursue green organic strategies, using renewable energy sources
Register to Reply
mrall
Active Contributor

Join Date: Mar 2008
Posts: 19
#6
In reply to #4

Re: Hydrogen Peroxide from Solar PV Route

04/27/2008 10:55 AM

Look at this and follow the links:

http://www.wateronline.com/Content/ProductShowcase/product.asp?DocID=115a86fc-c5a2-40b3-8b4e-b8d8b2d20a8d&VNETCOOKIE=NO

--- best, czes
Register to Reply
Tad
Power-User

Join Date: Dec 2006
Posts: 442
Good Answers: 32
#7
In reply to #4

Re: Hydrogen Peroxide from Solar PV Route

04/27/2008 2:39 PM

When you electrolyze a sodium chloride (salt) solution, chlorine is produced at the anode, and sodium hydroxide is produced at the cathode. If there is no separation of the two electrodes, the chlorine reacts with the sodium hydroxide to form sodium hypochlorite (bleach). The solution should be kept cool to avoid forming sodium chlorate.

It's as simple as using a battery (or any DC source) with 2 non-corrosive electrodes, and a salt solution.

Tad
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#9
In reply to #4

Re: Hydrogen Peroxide from Solar PV Route

04/28/2008 7:36 AM

By electrolysis. Wallace & Tiernan (usual disclaimer) make equipment that does this.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
RHABE
Guru

Join Date: Dec 2006
Location: Germany 49° 26' N, 7° 46' O
Posts: 1950
Good Answers: 109
#8

Re: Hydrogen Peroxide from Solar PV Route

04/27/2008 2:54 PM

Hi,

you really need nascent (atomic) oxygen, hydrogen-peroxide is split by many processes into water and one atom of oxygen. This atomic oxygen is much more reactive than the bi-atomic stable oxygen that is found in our atmosphere.

As solar cells produce low voltage you can easily produce some hydrogen and oxygen (in separate chambers) by electrolysis. The oxygen can be used for disinfection the hydrogen can be burnt.

Electrolysis can be done in a solution of sodium- or potassium-hydroxide.

Look for the companies that produce ozone generators to get the data which concentration of oxygen is needed for how long to kill the worst possible pathogens.

(One is Prominent in Germany).

RHABE
Register to Reply
Register to Reply
Have a Different Question?
9 comments
Copy to Clipboard

Users who posted comments:

Keith E Bowers (1); mrall (1); PWSlack (1); RHABE (1); Sciesis2 (1); surmil (2); Tad (2)

Previous in Forum: Handling H2SO4   Next in Forum: Measuring volume of bulk chemicals

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (78 right now)
Show Members
Advertisement