Carbonaceous material is gasified and the gas is processed to make purified syngas (a mixture of carbon monoxide and hydrogen).
en.wikipedia.org This slate is usually wrinkled, rich in carbonaceous matter, and scattered throughout are stringers and films of calcite, often carrying particles of pyrite.
en.wikipedia.org Their texture can likewise be very variable, including fleshy, like charcoal (carbonaceous), leathery, rubbery, gelatinous, slimy, powdery, or cob-web-like.
en.wikipedia.org So-called carbonaceous chondrites are especially fertile reservoirs of stardust.
en.wikipedia.org An acid is applied to the surface of the rock to etch away the matrix from the surface, leaving carbonaceous tissue protruding.
en.wikipedia.org