Second International Conference on Carbon Dioxide Removal (ICCDR-2) was held by RITE and NEDO at Kyoto in October, 1994. More than 400 sci-entists and engineers participated, and 147 papers were reported. ICCDR-2 consisted of 6 sessions; CO
2 separation, CO
2 sequestration, chemical CO
2 utilization, biological CO
2 fixation, CO
2 reducing technology, and CO
2 reducing systems. In session 2 papers on ocean and subterranean CO
2 disposal were reported and discussed. Most reports of ocean CO
2 disposal dealt with deep sea CO
2 sequestration, and most papers of subterra-nean CO
2 disposal focused on CO
2 sequestration in aquifers.
This article also describes the research on deep sea CO
2 sequestration at the depths larger than 3700m, which has been carried out by National Institute of Materials and Chemical Research in cooperation with the University of Tokyo and Mitsubishi Heavy Industries.
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