Subject
coal
24
coal gasification
17
coal combustion
14
fossil fuel
11
coal liquefaction
10
fuel
8
coal mining
7
coal utilization
6
carbon dioxide
5
coal conversion
5
fuel cell
5
fuel gas
5
natural gas
5
biomass gasification
4
chemical engineering
4
coal production
4
coal refining
4
gasification
4
hydrocarbon
4
kerosene
4
methanol
4
alkali metal
3
biofuel
3
biomass
3
ceramics
3
coal composition
3
coal impurities
3
coal preparation
3
energy
3
fossil fuel power plant
3
hydrogen production
3
lignite
3
mining
3
oil
3
petrochemicals
3
petroleum
3
petroleum production
3
petroleum refining
3
power plant
3
synthetic gas
3
Fischer Tropsch synthesis
2
NMR spectroscopy
2
aircraft
2
anthracite
2
ash
2
aviation fuel
2
biodiesel
2
biogas
2
carbon capture
2
carbonization
2
more ...