C.K. Hsu, C.L. Lee, C.J.G. Jou
Kaohsiung First University of Science and Technology,
Keywords: microwave, spent catalyst, hydrogen
Summary:This study uses spent catalyst to carry out partial oxidation based on the characteristic that microwaves choose to couple with materials that have a higher dielectric loss. The absorbed microwave can be turned into heat energy during the reaction process, because the catalyst can absorb the microwave (dielectric constant=11.7; dielectric loss=13.7 F/m). With 450W microwave, an exposure time of 360 min, and the same intake volume ratio (CH4/O2 =1:1), rich oxygen air (40% O2) can not only oxidize with methane, but also provide richer oxygen for the catalytic combustion of coke and more heat energy to process the partial oxidation. The results show that the CH4/rich-O2 hydrogen concentration (averagely 58.7 vs. 54.4 mol%) and reaction temperature are both higher than CH4/O2. Therefore, using spent catalyst to absorb microwaves and turn these into heat energy to carry out partial oxidation, and this represents an innovative idea with regard to energy production, economics, and spent catalyst regeneration.