29.超臨界水を用いた超重質油のオンサイト改質

概要

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Studies on the hydrothermal visbreaking of super heavy oil with alkali in the range of supercritical water have been carried out for developing a new on-site visbreaking technology combined with SAGD process. In this process, neither hydrogen gas nor catalyst is used, and neither CO_2 nor H_2S is issued. A combined system with SAGD can utilize the wastewater as steam for injection. Results of fundamental research have been published and presented at 7th UNITAR conference. Fundamental and important data for a new process were obtained. However, it was found that a heavier part of bitumen accumulated at the bottom of the vertical reactor, and it changed into cokes on the bottom. Therefore, coke accounted for more than 8% of the feed. In the present study, coke was suppressed to 0.2% by continuously discharging the accumulated heavier bitumen from the bottom of the reactor, amount of which was ca. 14% of the feed just enough to use as fuel for this combined system. Quality of produced oil is equivalent to Arabian medium crude.
一般社団法人日本エネルギー学会の論文
2006-10-12