Can coal be produced as a product and not from the mines ? what is excat difficulty in such production ?
There is no artificial or substitute for coal in any of the local manufacturing way!!!
As a by-product of hydrogen production plants, where methane is converted to CO2;
As a by-product of fermentation of sugar in the brewing of beer, whisky and other alcoholic beverages;
From thermal decomposition of limestone, CaCO3, in the manufacture of lime, CaO;
As a by-product of sodium phosphate manufacture;
Directly from natural carbon dioxide springs, where it is produced by the action of acidified water on limestone or dolomite.