What is the process called that adds hydrogen to coal under high temperatures and pressures in the presence of a catalyst to create synthetic fuels?

What is the process called that adds hydrogen to coal under high temperatures and pressures in the presence of a catalyst to create synthetic fuels?

• A. Hydrogenolysis
• B. Gasification
• C. Pyrolysis
• D. Hydrogenation

Answer: (D)

Hydrogenation is the process of adding hydrogen to unsaturated chemical structures to saturate them, typically using a metal catalyst under elevated temperature and pressure. In direct coal liquefaction, hydrogen is introduced to the coal under heat and pressure with a catalyst, breaking down the heavy material into lighter liquid hydrocarbons that become synthetic fuels. This differs from hydrogenolysis, which mainly involves breaking bonds with hydrogen; gasification, which turns coal into synthesis gas (CO and H2) for further synthesis; and pyrolysis, which thermally decomposes coal without oxygen to produce char, tar, and gas. So the scenario described fits hydrogenation.

Hydrogenation is the process of adding hydrogen to unsaturated chemical structures to saturate them, typically using a metal catalyst under elevated temperature and pressure. In direct coal liquefaction, hydrogen is introduced to the coal under heat and pressure with a catalyst, breaking down the heavy material into lighter liquid hydrocarbons that become synthetic fuels. This differs from hydrogenolysis, which mainly involves breaking bonds with hydrogen; gasification, which turns coal into synthesis gas (CO and H2) for further synthesis; and pyrolysis, which thermally decomposes coal without oxygen to produce char, tar, and gas. So the scenario described fits hydrogenation.