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Science 19 January 1968:
Vol. 159. no. 3812, pp. 317 - 319
DOI: 10.1126/science.159.3812.317
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Articles

Synthesis of Graphite and Hydrocarbons by Reaction between Calcite and Hydrogen

A. A. Giardini 1, C. A. Salotti 1, and J. F. Lakner 2

1 Department of Geology, University of Georgia, Athens
2 Lawrence Radiation Laboratory, Livermore, California

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.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)