Synthesis of Graphite and Hydrocarbons by Reaction between Calcite and Hydrogen

Science  19 Jan 1968:
Vol. 159, Issue 3812, pp. 317-319
DOI: 10.1126/science.159.3812.317


The reaction of calcite with hydrogen was investigated over a range of pressure, temperature, and time. The reaction initiates at about 500°C. Its primarily temperature-dependent rateproceeds in a crystallographically anisotropic manner, and reaction products are CaO, Ca(OH)2, H2O, CO, CH4, C2H6, and C (graphite), plus a black solid residue that may be hydrocarbon.