Coal gasification by the coal/CH4-ZnO-Zn-H2O solar energy conversion system

M. Tsuji, Y. Wada, Y. Tamaura, A. Steinfeld, P. Kuhn, R. Palumbo

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The coal/CH4-ZnO-Zn-H2O system has been proposed for the 2-step efficient chemical conversion system of the fossil fuels using a solar energy as the process heat and fossil fuel/ZnO redox system. The overall reaction is represented by CHx(coal) + CH4 + 2H2O(g) = 2CO + (4 + x/2)H2 The complete coal gasification to H2/CO gas mixture with the coal/ZnO redox system could be demonstrated with zero CO2 emissions at 1000-1100°C, eliminating the need to separate, while the steam gasification efficiency of coal remained 47% on a carbon basis. Zn-H2O reaction was conducted to generate H2 gas successfully. In the overall reaction, the product gas of the H2/CO mole ratio 2 could be obtained and can be directly used for synthesis of methanol and other chemicals.

Original languageEnglish (US)
Pages (from-to)1315-1320
Number of pages6
JournalEnergy Conversion and Management
Issue number6-8
StatePublished - 1996


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