Which of the following are true about Producer Gas?

(A) It is the result of conversion of solid biomass into gaseous fuels.

(B) It is done at lower temperature.

(C) It can be used as fuel in internal combustion engines.

(D) It is in the complete absence of oxygen.

(E) Hydrogen and methane present in Producer Gas determine its heating value.

Choose the correct answer from the options given below:

The correct answer is (A), (C) and (E) Only.

Let us analyze each statement to understand why this option is correct:

Statement (A): It is the result of conversion of solid biomass into gaseous fuels.
This statement is correct. Producer gas is a type of fuel gas manufactured by gasifying solid fuels, such as coal, coke, or solid biomass (wood, agricultural waste, etc.), in a gasifier.

Statement (B): It is done at lower temperature.
This statement is incorrect. The gasification process used to generate producer gas is a high-temperature thermochemical process, typically requiring temperatures ranging from 700°C to over 1000°C.

Statement (C): It can be used as fuel in internal combustion engines.
This statement is correct. Producer gas can be cleaned and cooled to be successfully used as a fuel in both compression ignition (diesel) engines (in dual-fuel mode) and spark ignition (gasoline) engines.

Statement (D): It is in the complete absence of oxygen.
This statement is incorrect. Producer gas is manufactured by partial combustion of carbonaceous materials with a limited supply of air (which contains oxygen) and sometimes steam. Complete absence of oxygen refers to pyrolysis, whereas gasification requires a controlled, sub-stoichiometric amount of oxygen.

Statement (E): Hydrogen and methane present in Producer Gas determine its heating value.
This statement is correct. Producer gas consists mainly of carbon monoxide (CO), hydrogen (H₂), nitrogen (N₂), and small amounts of methane (CH₄). Since nitrogen is inert and carbon monoxide has a relatively low heating value, the combustible components like hydrogen and methane play a key role in determining the overall calorific or heating value of the gas.

Therefore, statements (A), (C), and (E) are the only true statements about Producer Gas.