24.無溶媒液化反応におけるオイル生成物分布と炭種の影響

概要

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Single-and two-stage liquefactions of Yallourn, South Banko, and Tanitoharum coals were performed in an autoclave of 50ml capacity at the solvent (tetralin)/coal ratios of 1.5 and 0, using NiMo sulfides supported on carbon nanoparticles (NiMo/KB catalyst). The oil yield decreased very much by reducing the solvent amount regardless of the coal species, however the two-stage (360℃-60min/450℃-60min) liquefaction gave the much higher oil yields of 60-68% even without solvent compared to the single-stage (450℃-60min) reaction. The oil produced with NiMo/KB catalyst carried more lighter fractions in the boiling range of 100-300℃ regardless of the coal species, especially in the two-stage liquefaction. Such excellent performances of NiMo/carbon catalyst reflect its higher hydrogenation activity as well as the high dispersion on the coal surface at the initial stage of coal liquefaction, suppressing the retrogressive reactions even under the solvent-free conditions.
一般社団法人日本エネルギー学会の論文
1997-10-30