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)
(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.