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成果報告書詳細
管理番号20190000000302
タイトル*平成30年度中間年報 NEDO先導研究プログラム エネルギー・環境新技術先導研究プログラム CCS 触媒化学の融合によるCO2転換技術の開発
公開日2019/5/17
報告書年度2018 - 2018
委託先名国立研究開発法人産業技術総合研究所
プロジェクト番号P14004
部署名材料・ナノテクノロジー部
和文要約
英文要約Title: Development of an advanced methodology for the combination of CCS technology with catalyst nano-technology (FY2018 Annual Report for NEDO leading program)

CO2 capture and storage (CCS) technology has been established for deep cutting of CO2 reduction from large point sources of CO2 emission (e.g., power generation, oil refining, cement manufacture, etc.) so far, while direct production of liquid fuels from CO2 now being attracted as a vital tool for mitigating CO2 emissions and reducing dependence on petrochemicals. However, enormous energy should be required to its converting process, which give rise to huge amounts of CO2 emission due to the burning of the fossil fuels and thus will not lead to reduction of CO2 emission from atmosphere. Here, for the solution of both CO2 deep reduction and establishment of efficiency CO2 converting system, we suggest as an advanced methodology for CCS technology that the combination of CCS with catalyst nano-technology.
The purpose of our study is to experimentally investigate (i) CO2 converting mechanism using nano-sized nickel catalyst supported on alumina and some water and (ii) dispersion of the nano-sized metal catalyst into pores of host reservoir rocks (e.g., sandstone) using fluid characteristic in the supercritical CO2 state under condition of geological storage of CO2, where the injected CO2 lies as a supercritical fluid within such host reservoirs. In particular, Ni/Al2O3 catalyst was prepared by impregnation method, and analyzed by TEM, XRD, SEM-EDX, TG-DTA. Also, in order to give a good performance of catalyst dispersion in injecting and penetrating CO2 within host reservoir rock, spherical shape catalyst such as metal core silica shell type core-shell (Ag@SiO2 core-shell nanoparticle) was prepared and analyzed throughout the same types of instruments used in the catalyst experiment.
Our results demonstrated that after the catalyst experiment, paraffin hydrocarbons (C10-C38) were observed through several sampling points (cell, filter, pipeline, 1st and 2nd trappings, and aluminum bag), and thus, it can be concluded that CO2 and H2O could be converted into a wide variety of paraffin hydrocarbon series in supercritical state of CO2 for short terms (e.g. several days). In terms of the dispersion experiment, it was indicated that based on X-ray CT analysis, supercritical CO2 fluid provides a good performance for dispersing Ag@SiO2 core-shell nanoparticle uniformly into the rock specimen tested in the post-experiment.
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