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- 저자 : Jiejie Huang (검색결과 2 건)
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Kai Huang,Sheng Lin,Jiejie Wang,Zhenghong Luo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Ferrite catalysts with high intraparticle pore volume and surface area are frequently used in theoxidative dehydrogenation of butylene. Whether the non-inclusion of intraparticle transfer limitation infixed-bed reactors for oxidative dehydrogenation over ferrite catalysts in previous studies is appropriateremains unclear. In this study, we attempt to verify this process using a multi-scale modelingtechnology. The multi-scale model consists of a porous medium model and a single particle model underthe oxidative dehydrogenation condition. This model can predict the influences of intraparticle transferon the main component distributions in reactors and demonstrate that the intraparticle transferlimitation is obvious.
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Mineral behavior of low-temperature lignite ashes under gasification atmosphere
Yitian Fang,Fenghai Li,Jiejie Huang,Yang Wang 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.3
To investigate the mineral behavior of lignite ashes under gasification conditions, 450 oC Xiaolongtan lignite ash samples (XLT-LTA) treated at different temperatures or pressures under reducing atmosphere (H2/CO2=1 : 1, volume ratio) have been examined by means of an SC-444 apparatus, a scanning electron microscope with an energy dispersive X-ray detector (SEM-EDX), and by X-ray diffraction (XRD). The results showed the sulfur content in the XLT-LTA to be much higher than that in ashes prepared at 815 oC, as a result of the release of sulfur dioxide during the oxidization of pyrite. With increasing temperature, the XLT-LTA particles gradually agglomerate and form partially molten surface entities with obvious apertures, and the content of iron and calcium in the congeries or molten parts increases due to the fusion of fine ash particles with the enrichment of iron and the formation of low-temperature eutectics of calcium and iron. An increase of pressure restrains the decomposition of calcite and muscovite, and promotes the formation of iron minerals (e.g., hercynite, cordierite, and sekaninaite) and orthoclase. The content of amorphous material also increases with increasing pressure.
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