PhysForum Science, Physics and Technology Discussion Forums -> Calcium Carbonate And Hydrochloric Acid

Help

Members

Calendar

Welcome Guest ( Log In | Register )

Calcium Carbonate And Hydrochloric Acid, Could they be used as a fuel source?

LoFi version | Track this topic | Email this topic | Print this topic

H2O	Posted: Dec 31 2009, 04:15 AM Quote
Advanced Member Group: Power Member Posts: 377 Joined: 2-April 09 Positive Feedback: 50% Feedback Score: -16	CaCO3 + 2HCl -> CaCl2 + CO2 + H20 and a release of heat CaCl2 -> Ca + Cl2 (electrolysis) 2Ca + O2 -> 2CaO and a release of heat CaO + H2O -> Ca(OH)2 and a release of heat CO2 + H2O -> H2CO3 (slowly at room temp) H2CO3 + Ca(OH)2 -> CaCO3 + 2H2O (I don't know if this is exothermic or not) If this is doable then hydrochloric acid is used up with a product of chlorine gas. A gas that has many uses. If the last reaction is endothermic then discard the last two reactions and both HCl and CaCO3 are used up with CO2, Cl2 and Ca(OH)2 as byproducts. Both Cl2 and Ca(OH)2 are widely used chemicals and you still get the release of CO2 (greenhouse gas) which isn't as good. -------------------- I have received no formal education in much of the subject matter on this forum and have only a high school diploma. What I do know (that would be beyond high school) is what I have learned over the years from reading books, magazines, blogs, forum posts etc. or have seen in documentaries, short clips, etc. The opinions in my post are my own and do not reflect anyone else's unless referenced and may not be correct.
	Send PM · Send email ·

Matador	Posted: Dec 31 2009, 07:56 AM Quote
Advanced Member Group: Power Member Posts: 873 Joined: 11-August 09 Positive Feedback: 95% Feedback Score: 46	I think you will find that the amount of energy input required for the electrolosis step is far greater than the heat energy that can be harnessed from the reaction in step one. This is simply because of the inefficiency of heat as a energy source with todays techniques. This procedure would require a multi-step reaction, and this would also be somewhat inefficient, with loss of yield at every step. Also you'will find that HCl is also somewhat costly to produce in the 1st place. ie/ it doesnt just come out of the ground. Sorry, but at this time that is all i can deduce. This post has been edited by Matador on Dec 31 2009, 08:04 AM -------------------- Banned by Administration
	Send PM · Send email ·

Matador	Posted: Dec 31 2009, 08:25 AM Quote
Advanced Member Group: Power Member Posts: 873 Joined: 11-August 09 Positive Feedback: 95% Feedback Score: 46	So HCl gas is produced on an industrial scale by electrolysis of brine. It is than mixed with H2O to make a solution. This means that the enegy input required to make HCl is far greater than the amount of heat released in the reaction. And then you still need more energy for the second electrolysis step. Overall, you will put in more energy into the system than you'll extract from it. This post has been edited by Matador on Dec 31 2009, 08:26 AM -------------------- Banned by Administration
	Send PM · Send email ·

cazhi	Posted: Jan 5 2010, 01:59 AM Quote
Newbie Group: Members Posts: 3 Joined: 5-January 10 Positive Feedback: 0% Feedback Score: 0	Is it possible? It will be in demand in many countries if this would be possible, so what are the risks? This post has been edited by cazhi on Jan 5 2010, 02:00 AM
	Send PM · Send email ·

Posted: Mar 8 2010, 07:57 AM

Quote

Member

Group: Power Member
Posts: 208
Joined: 1-August 06

Positive Feedback: 100%
Feedback Score: 4

QUOTE (cazhi @ Jan 5 2010, 01:59 AM)

Is it possible?

It will be in demand in many countries if this would be possible, so what are the risks?

Hydrochloric acid and Chlorine are both highly toxic and corrosive, and difficult to handle.

--------------------

"No eternal reward will forgive us now, for wasting the dawn."

"No one here gets out alive!"

boit	Posted: Mar 26 2010, 05:23 AM Quote
Moran of the Burning Spear Group: Power Member Posts: 2544 Joined: 13-March 08 Positive Feedback: 62.16% Feedback Score: 25	Highly toxic indeed. Not to mention terrorists may advocacte for this type of power generation. They won't have to carry any arsenal on board. -------------------- Boit was last taught physics in class way back in 1994. Whatever he's learnt thereafter is purely by personal effort through this forum and searching the net. He is not an authority in any matter science. Unless with clear referrence, what he puts forward is his own understanding of what he has read and may not always be correct. Peace.
	Send PM · Send email ·

« Next Oldest | Chemistry | Next Newest »