Question

How is peat directly converted into anthracite by the process of parallel evolution (Hilt’s law)?

(a) By maintaining the acid conditions

(b) By the process of consolidation and dewatering

(c) By the aerobic decay of peat

(d) By continuous eliminations of H2 gas

This question was addressed to me by my college professor while I was bunking the class.

Origin of the question is Coal topic in division Fuels and Combustion of Engineering Chemistry II

Answer 1

The correct option is (d) By continuous eliminations of H2 gas

Explanation: When there is continuous elimination of H2 gas, it creates an anaerobic condition due to which there is loss O2 which creates anthracite directly. For aerobic decay, under sedimentary rocks lignite and bituminous coal are formed under different conditions.