Arrange the following in their ascending order of Lower Heating Values (LHV):
 (A) Anthracite

(B) Crude oil

(C) Bituminous

(D) Methane

(E) Lignite
Choose the correct answer:

Correct option is D

TheLower Heating Value (LHV)of a fuel refers to the amount of heat released during the combustion of a unit amount of the fuel, without accounting for the latent heat of vaporization of water produced during combustion. Based on the typical values of LHV for the fuels listed:

1. Lignitehas the lowest LHV, as it is a low-rank coal with a high moisture content.

2. Anthracitehas a relatively higher LHV compared to lignite but is still lower than the higher ranks of coal like bituminous.

3. Bituminouscoal has a higher LHV compared to lignite and anthracite due to its higher carbon content and lower moisture.

4. Crude oilhas a higher LHV than bituminous coal, as it contains hydrocarbons that are more energy-dense.

5. Methane, being a natural gas, has the highest LHV among these fuels, as methane is primarily composed of methane gas (CH₄), which has a high calorific value.

Thus, the fuels arranged in ascending order of theirLower Heating Values (LHV)are:

(E) Lignite < (A) Anthracite < (C) Bituminous < (B) Crude oil < (D) Methane