[toanandmishra]

I want to refine my bio gas to pure methane .
Kindly provide the chemical and procedures to do so .

[Burner]

You will need to know the components of your biogas. How is it made?

[toanandmishra]

Besides methane bio gas mainly consists of two different things.
First hydrogen sulphide and second is carbon di oxide
And i need a chemical process to remove them.

[Burner]

https://en.wikipedia.org/wiki/Hydrogen_sulfide#Removal_from_fuel_gases
https://en.wikipedia.org/wiki/Carbon_dioxide_scrubber

Be aware that if you want pure methane you may need to remove unreacted nitrogen, oxygen and other atmospheric gases too.

[proteus]

I have bubbled through a water and charcoal column for small amounts.

[toanandmishra]

Want to make a carbon scrubber in home .
How to remove the carbon di oxide from atmospheric gases chemically.

[Arkcon]

OK.  What reactions do you know that carbon dioxide undergoes?  What have you learned, and where have you checked?

I'm sorry to answer questions with more questions, but that's how we tech people here on these forums.  Its part of the Forum Rules{click}.

[toanandmishra]

magnesium burn in atmosphere of carbon dioxide.
Mg+CO2→MgO+C

Now we can electrolyse the  mixture :

MgO+H2O→Mg(OH)2

4OH−→O2+2H2O+4e−

Tried this method with my brother  not feasible on large scale costly and needs time
So Needed any simpler method to do so

[Borek]

Have you tried googling for "scrubbing carbon dioxide"?

[toanandmishra]

Found some by googling but process not very clear

[toanandmishra]

Found that some scrubbing tower installed in open atmosphere but there reactions and procedures are not provided.

[Arkcon]

This is a scholarly reference on the subject: http://www.sciencedirect.com/science/article/pii/S0960148104003830

I can only see the abstract, but a quick check by you will show you that this is a common problem where ever biogas is produced.  Even in the abstract, they address the problem more completely than you have in posting after posting.  Did you actually read our forum rules?  We can't teach you everything one posting at a time.  Did you read the Wikipedia pages that Burner: went and looked up for you?  These are good starting points.  That article has a good review, and its references would be good information too.

magnesium burn in atmosphere of carbon dioxide.
Mg+CO2→MgO+C

Now we can electrolyse the  mixture :

MgO+H2O→Mg(OH)2

4OH−→O2+2H2O+4e−

Tried this method with my brother  not feasible on large scale costly and needs time
So Needed any simpler method to do so

No you didn't.  The electrolysis of a suspension of an insoluble hydroxide is not possible.  Not at home.  And I doubt you were able to melt a refectory material.  If you tried this in an atmosphere of methane gas you would certainly not be posting, we would have just heard the explosion.  Unless you have a pressure vessel with no oxygen, and are igniting the magnesium some other way.  But that's not a home process.

Please don't do this -- make up random things, and claim to have done them.  The internet is full of people claiming to have done things, when they really haven't.  We here,  on the Chemical Forums, are trying to be better than that.

[toanandmishra]

Dear sir thank you  for replying but my this topic is not related with the refining of bio gas .
I wish to build a process to chemically decompose the carbon dioxide to oxygen  . For this we used dry ice in a vaccum vessel then follow the remaining task .
Me and my brother not very good at chemistry thats why i asked them here because these reaction performed by us looks not feasible but they are  suggested by a chemistry scholar with whom we consulted.

[Arkcon]

Dear sir thank you  for replying but my this topic is not related with the refining of bio gas .

That's funny, you've claimed it was multiple times in this thread.

I wish to build a process to chemically decompose the carbon dioxide to oxygen  .

Awesome, plants do this all the time, using solar power of all things.  Efficiency remains a problem, but have been adequate for millennia.

For this we used dry ice in a vaccum vessel then follow the remaining task .
Me and my brother not very good at chemistry thats why i asked them here because these reaction performed by us looks not feasible but they are  suggested by a chemistry scholar with whom we consulted.

OK, except that entire process is nonsense.  High School students come to our forum looking for help, I'd hate for them to read what you've written and think its something they could use on their studies.