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What is the pressure applied during hydrogenation of coal?

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What is the pressure applied during hydrogenation of coal?

(a) 200-280atm

(b) 200-250atm

(c) 300-380atm

(d) 300-350atm

This question was posed to me in an interview.

Question is from Mining of Petroleum topic in division Fuel Technologies of Applied Chemistry

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The correct option is (b) 200-250atm

Explanation: A pressure of 200-250atm is applied in Bergius process for one hour 30 minutes.In polymerization the pressure of 70-350kg/cm^2 is applied.

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