Coal liquification

Compare of coal liquification for the production of liquid fuels vs making electric power out of coal and the usage in vehicles with electric propulsion.

Data from the German Wikipedia

The coal liquification method from Bergius delivers from 100 kg coal, 40 kg heavy oil from the process, 5 kg iron oxide and 5 kg hydrogen at 120 to 150 at pressure and 450 to 480 degree Celsius temperature about 30 kg light oil, 50 kg heavy oil and 20 kg gas, mainly methan and ethan.

The evaluation

At the coal liquification with 100 kg coal and 5 kg hydrogen are 30 kg light oil and 20 kg gas the output. The exact mix is not mentioned, so I assume 12 kWh per kg. This makes fuel with 600 kWh chemical energy.

A modern coal power plant produces with 100 kg coal 450 kWh electric power. The origin of the 5 kg hydrogen in the Wikipedia article is not clear, so I assume to make with the hydrogen electric power in a CCPP. This makes additional 96 kWh.

So we have at one side 600 kWh chemical energy in liquid fuel from the coal liquification and on the other side 546 kWh electric power.

Renault Kangoo Gasoline Diesel Natural gas Cleanova II
City traffic 9.6 l = 85.4 kWh 6.7 l = 65.7 kWh 8.3 kg = 108.4 kWh 14.4 kWh
Outside town 6.2 l = 55.2 kWh 4.7 l = 46.1 kWh 5.3 kg = 69.2 kWh 19.6 kWh

It ist possible to Es ist make all with renewable energy from sun and wind. But there is a comparative for unfavorably. In this sense is the coal liquification much worse than to make electric power from coal.

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