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Question 11

Which of the following reactions increase production of dihydrogen from synthesis gas?

(a)CH4(g)+H2O(g)1270 K−−−NiCO(g)+3H2(g)(b)C(s)+H2O(g)1270 K−−−CO(g)+H2(g)(c)CO(g)+H2O(g)673K−−−−CatalystCO2(g)+H2(g)(d)C2H6+2H2O(g)1270 K−−−Ni2CO(g)+5H2(g)

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Solution

(b)

The process of producing syn gas or synthesis gas from coal is called 'coal gasification'.

CCoal(s)+H2O(g)Steam1270 k−−NiCO(g)+H2(g)syn gas

The production of hydrogen can be increased by reacting carbon monoxide of the syn gas with steam in the presence of iron chromate as a catalyst at 673 K.

CO(g)+H2O(g)FeCrO4,673 k−−−−−−−CO2(g)+H2(g)

CO2 is removed by scrubbing with a solution of sodium arsenite.


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