Question

Explain bosch process for preparation of hydrogen

Answer 1

Answer:

Bosch process is the process used to prepare di-hydrogen commercially. In this process water gas (CO + H2, prepared from coal and water at 1270 K) is mixed with two times its volume of steam passed over catalyst Fe2O3, in the presence of promoter Cr2O3 or ThO2 at 773 K giving products CO2 and H2.

Answer 2

Answer:

Industrial production of Hydrogen is done by bosch's process

1. hydrogen is prepared by passing steam over red hot coke at a high temparature.

the would be carbon mono oxide and hydrogen together as a mixture known as

water gas.

C + H2O -------------------> CO + H2

(coke) (water as steam) (Carbon monoxide) (Hydrogen gas)

2. It is difficult to separate hydrogen from water gas.Therefore to increase production of hydrogen, the water gas is mixed with steam in the presence of iron chromate (Fe2(CrO4)3) as a catalyst. the reaction produces a mixture of carbon dioxide and hydrogen.

CO + H2 + H2O ----(Fe2(CrO4)3)----> CO2 + 2H2

(Carbon (hydrogen) (steam) (catalyst) (carbon (Hydrogen)

monoxide) dioxide)

3. This mixture is passed through caustic potash(KOH) solution, which produces hydrogen.

2KOH + CO2 -----------------------> K2CO3 + H2O

(Potassium

carbonate)