prov:value
| - Many gases containing carbon are applicable as a raw material gas. [0098] Examples of the raw material gas include gases comprising only carbon and hydrogen, such as methane, ethane, propane, butane, pentane, hexane, ethylene, acetylene, benzene, toluene and cyclohexane, and gases comprising carbon, hydrogen and other elements, such as benzonitrile, acetone, ethyl alcohol, methyl alcohol and carbo
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