二酸化炭素回収のための格子酸素ガス化・燃焼プロセス

抄録

Chemical looping gasification and combustion using lattice oxygen was proposed for carbon dioxide separation and withdrawal without energy penalty in the energy conversion process. Pretest using polyethylene showed the potentiality for the low temperature gasification lower than 873K due to the large amount of hydrogen formation during reduction of NiO as well as CO, CO₂ and hydrocarbons. Quartz reactor, 20mm I. D. and 1120mm height, was used for the repeated reaction test of the NiO reduction with methane and Ni oxidation with air to confirm the function of the lattice oxygen. Carbon dioxide was observed with sufficient amount of lattice oxygen. However, carbon monoxide was generated with insufficient lattice oxygen. Hydrogen is probably generated at the same time. Decrease in the reactivity of the lattice oxygen was not observed until the reaction reaches 90 times cycles except for the minor decrease in the initial five cycles.