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이온교환된 NaY 제올라이트를 이용한 TBM와 THT의 흡착제거
정갑순(Gap Soon Jung),이석희(Seok Hee Lee),천재기(Jae Kee Cheon),최재욱(Jae Wook Choe),우희철(Hee Chul Woo) 한국청정기술학회 2009 청정기술 Vol.15 No.1
천연가스로부터 유기 황 화합물인 THT와 TBM의 흡착 제거를 위해 NaY 제올라이트계를 이용하여 흡착 실험을 수행하였다. NaY에 대한 표면의 산-염기적 특성을 변화시키고 흡착능의 향상을 도모하기 위하여 Li, K, Fe, Co, Ni, Cu, Ag 등의 금속이온으로 이온교환하였으며, 이를 부취제 THT와 TBM의 흡착 제거에 적용하였다. 그 결과 Cu-NaY, Ag-NaY, NaY에서 다른 물질들에 비해 THT, TBM의 파과흡착량이 높게 나타났으며, Cu, Ag가 이온교환된 제올라이트의 증가된 산성적 특성 때문에 다른 이온들에 비해 높은 파괴흡착량을 나타낸 것으로 사료되어진다. 산량이 Ag-NaY보다 높게 측정된 Cu-NaY의 경우, Cu의 담지량을 조절하였다. 이들 가운데 0.5 M의 질산구리 용액으로 이온교환된 Cu-Nay-0.57). 가장 높은 파과흡착량을 보였으며, THT에 대해 1.85 m㏖-S/g, TBM에 대해 0.78 m㏖-S/g을 각각 나타내었다. 그리고 THT의 탈착 활성화에너지는 NaY, Cu-Nay-0.5 en 물질에 대하여 큰 차이가 없었으며, TBM의 탈착 활성화에너지의 경우 Cu-Nay-0.5 흡착제에서 NaY 보다 높게 측정되었다. Adsorptive removal of tetrahydrothiophene (THT) and tert-butylmercaptan (TBM) that were widely used sulfur odorants in pipeline natural gas was studied using various ion-exchanged NaY zeolites at ambient temperature and atmospheric pressure. In order to improve the adsorption ability, ion exchange was performed on NaY zeolites with alkali metal cations of Li?, Na?, K? and transition metal cations of Cu²?, Ni²?, Co²?, Ag?. Among the adsorbents tested, Cu-NaY and Ag-NaY showed good adsorption capacities for THT and TBM. These good behaviors of removal of sulfur compound for Cu-NaY and Ag-NaY zeolites probably was influenced by their acidity. The adsorption capacity for THT and TBM on the best adsorbent Cu-Nay-0.5, which was ion exchanged with 0.5 M copper nitrate solution, was 1.85 and 0.78 m㏖-S/g at breakthrough, respectively. It was the best sulfur capacity so far in removing organic sulfur compounds from fuel gas by adsorption on zeolites. While the desorption activation energy of TBM on the Cu-Nay-0.5 was higher than NaY zeolite, the difference of THT desorption activation energy between two zeolites was comparatively small.
Euro-6(c) 입자상 물질 개수(PN) 규제 대응 GDI 차량 실도로 내구를 통한 GPF 시스템 PN 제거 성능 검증
정갑순(Gap-soon Jung),송진우(Jin-woo Song),윤기영(Ki-young Yoon),인치범(Chi-bum In) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
In this study, a optimized GPF system was verified with 160,000 km fleet durability test conducted with GDI vehicle by the first in Korea. The GPF system could meet the Euro-6(c) PN regulation at all given mileage, and soot accumulation was not found at low speed driving, < 50kph, until 20,000 km. And the getting higher PN removal efficiency and back pressure were observed with increasing mileage, thanks to the ash accumulation in GPF. The accumulated ash played key role to increase back pressure of the GPF, and the shape of ash was deeply related with the exhaust gas flow distribution. Eelemental analysis of the ash was well matched with the lubricant oil such as P, Zn, Ca.