Syn gas is major source for …

(i) Biomass gasification is a process of converting solid biomass fuel into a gaseous combustible gas (called producer gas) through a sequence of thermo-chemical reactions. 

Coal gasification is the process of producing syngas–a mixture consisting primarily of methane (CH₄), carbon monoxide (CO), hydrogen (H₂), carbon dioxide (CO₂) and water vapor (H₂O)–fromcoal and water, air and/or oxygen.

(ii) Biomass gasification is more advantageous over coal gasification because firstly, coal is fossil fuel and extraction of coal is a cumbersome process with risks of fire accidents during excavation. While, biomass gasification is a simple way of energy tranformation. Biomass is easily available and efficiency in the process is also high comparitively.

(iii) C(s)+H₂O(g)$\stackrel{473-1273K}{\to }$CO(g)+H₂(g)