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Oligomerization of light olefins over ordered porous catalysts
박민범,채호정 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
The oligomerization of ethene and 1-hexene was performed over ZSM-5 and beta zeolite catalysts. H-ZSM-5 and H-beta composed of nanometer scale sheet-like crystals, as well as intercrystalline mesoporosity, were found to be much more efficient for the oligomerization of 1-hexene to liquid products higher than C10 (C10+). In the oligomerization of ethene, identically prepared ZSM-5 and beta zeolites but with further exchange with Ni ion, also showed higher activity with remarkable C10+ product selectivity after a single stage oligomerization, as compared to the corresponding cation form of ZSM-5 and beta zeolites without nanocrystalline and mesoporous morphology. These results demonstrate that both small crystal size and the mesoporosity of the zeolite catalyst are critical factors for improving the diffusion limitation during the oligomerization of light olefins. This improvement was accompanied by a shift in major oligomeric product selectivity toward C10+ hydrocarbons.
박민범 ( Min Bom Park ),김은나 ( Eun Na Kim ),정은호 ( Eun Ho Jeong ),김진우 ( Jin Ou Kim ),왕희배 ( Hee Bae Wang ),김태호 ( Tae Ho Kim ),이기조 ( Key Jo Lee ),서상렬 ( Sang Yeol Suh ),진소영 ( So Young Jin ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.5
The definition of C1q nephropathy has been categorized since 1985. However, the clinical correlation and pathophysiology has not yet been fully revealed. Therefore, the treatment of C1q nephropathy has not been established. Our subject was a 23 year-old female patient with both leg edema and oliguria, who was presented with weight gain. Renal biopsy confirmed C1q nephropathy. Prednisolone and cyclosporine therapy was selected for treatment. After 2 weeks of treatment, the patient lost 8 kg of body weight and all laboratory examination results were normalized. Both leg edema and oliguria were resolved. After 21 weeks of regular follow-up, she stopped the medicine by herself. Eight weeks later, the patient came to the Emergency room because both leg edema recurred. Same regimen was administered for 3 weeks, and complete remission was achieved again.
권성준,박민범,이동원,유영우,허일정,이진희 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Among the technologies for removing nitrogen oxides (NOx), which is known as a secondary particulate matter-inducing precursor, selective catalytic reduction by NH3 (NH3-SCR) applied to car waste gas treatment has a disadvantage of supplying NH3 by converting urea, and thus an alternative technology is required. Carbon monoxide (CO) is considered a good alternative because it can be easily supplied from fuels directly from swept gas or by engine technology. Currently, CO-SCR technology has been studied in a limited range, and in particular, despite the use of zeolites as NH3-SCR commercial catalysts, the CO-SCR studies using these zeolites as supports are hardly reported. In this study, CO-SCR catalysts were synthesized by impregnation of iridium into various types of zeolite supports, and NOx conversion was evaluated according to the type of support. The synthesized catalysts were characterized by PXRD, TEM, N2 sorption, and H2 chemisorption.