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Question:

Sodium Hydroxide(lye) and Aluminum vs electrolysis to create Hydrogen?

Electrolysis of water seems like a massive waste of energyI can buy 50lb bags of Sodium Hydroxide for 35 dollars and an unlimited supply of aluminum cans and foilIs it more efficient to do this than using electrolysis, reforming, or gasification.

Answer:

Thermal or electrical?
The best insulation is nothingThat is a vacuumIt doesn't conduct heat or electricityIt only permits radiant heat to pass through.
There is a vast amount of hydrogen consumed daily in the ammonia synthesis process and the synthetic fuel industry Very clever chemical engineers have decided that the most economical way to get this hydrogen is by electrolysis, reforming, or gasificationDo you wonder why they have stuck with this route A few ideas come to my mind : Caustic soda: This has to come from the electrolysis of NaClA by-product is chlorine gasThe production of NaOH and Cl2 gas has to be kept in balance If you have a new high demand for NaOH - what do you do with the extra Cl2 gas producedMy understanding of this industry ( talking to some friends involved in this ) is that there is a ready market for NaOH but not for Cl2 - due to health and safety problemsFor instance the pulp and paper industry which had a large requirement for Cl2 now uses little if any It would be difficult to introduce a new market for NaOHThe end product of the aluminium / NaOH reaction is sodium aluminate What are you going to do with this ? Aluminium cans and foil : It is very simple to collect a few empty aluminium cans or foil for a home experiment - but you can hardly expect to run the hydrogen gas industry on the collection of scrap aluminium - This is without considering what the established industry that recycles scrap aluminium cans back into new cans will do if their raw material source is removed Do you know enough about the costing of producing hydrogen via reforming, or gasification to be certain that your Al/NaOH process is cheaper? Just a few thought - there are many others I am sure.
Thermal or electrical?
The best insulation is nothingThat is a vacuumIt doesn't conduct heat or electricityIt only permits radiant heat to pass through.
There is a vast amount of hydrogen consumed daily in the ammonia synthesis process and the synthetic fuel industry Very clever chemical engineers have decided that the most economical way to get this hydrogen is by electrolysis, reforming, or gasificationDo you wonder why they have stuck with this route A few ideas come to my mind : Caustic soda: This has to come from the electrolysis of NaClA by-product is chlorine gasThe production of NaOH and Cl2 gas has to be kept in balance If you have a new high demand for NaOH - what do you do with the extra Cl2 gas producedMy understanding of this industry ( talking to some friends involved in this ) is that there is a ready market for NaOH but not for Cl2 - due to health and safety problemsFor instance the pulp and paper industry which had a large requirement for Cl2 now uses little if any It would be difficult to introduce a new market for NaOHThe end product of the aluminium / NaOH reaction is sodium aluminate What are you going to do with this ? Aluminium cans and foil : It is very simple to collect a few empty aluminium cans or foil for a home experiment - but you can hardly expect to run the hydrogen gas industry on the collection of scrap aluminium - This is without considering what the established industry that recycles scrap aluminium cans back into new cans will do if their raw material source is removed Do you know enough about the costing of producing hydrogen via reforming, or gasification to be certain that your Al/NaOH process is cheaper? Just a few thought - there are many others I am sure.

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