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Namkung, Hueon,Kim, Hyung-Taek,Wang, Fuchen,Lin, Kuangfei,Yu, Guangsuo Springer-Verlag 2017 Korean Journal of Chemical Engineering Vol.34 No.12
<P>Particle stickiness is a key parameter for increasing ash deposition in gasification process. We conducted multilateral investigations to evaluate particle stickiness of coal ash at low temperature fouling conditions through Watt and Fereday's viscosity model, dilatometry (DIL) and laser flash apparatus (LFA) technique. Seventeen coals were employed for ash deposition experiments under gasification condition through drop tube furnace (DTF). The low viscosity not only led to increasing ash deposition behavior, but also increasing the particle size of deposited ash. From DIL analysis, the ash sintering behavior increased with increasing temperature due to increase of particle stickiness. The high amount of Fe2O3, CaO and MgO components resulted in low sintering temperature and high reduction of physical length. Through LFA analysis, the thermal conductivity increased with increasing temperature, because of increasing particle stickiness. In addition, its value was correlated with the propensity of common fouling indices.</P>
기술 소개 : 중국 화동이공대학 청정석탄기술연구소(ECUST-ICCT)의 분류층 가스화 기술의 현황
남궁훤(Hueon Namkung),허려화(Li-Hua Xu),김형택(Hyung-Taek Kim),Fuchen Wang,Xin Gong,Guangsuo Yu 한국에너지기후변화학회 2016 에너지기후변화학회지 Vol.11 No.1
China, which is the highest coal consumption nation, has promoted large coal gasification projects to obtain the highly efficient clean energy. Many coal gasification plants have been constructed in China by using foreign gasification technologies since 1980 whereas China attempted to develop its own gasification technology due to problems in operation through their applications. The representative among Chinas coal gasification technologies is OMB (Opposed Multi Burner) CWS and SE (Sinopec+ECUST) entrained-flow gasification technology of ECUST-ICCT. Pilot scale gasifier has been studied from 1995 and then 3000 ton/day commercial gasifier was developed in 2015. 44 gasification projects using ECUST technology are conducted. 121 gasifiers are operated or under construction and development in those projects. In particular, OMB CWS gasifiers of 2500 ton/day (×5) have been planned for construction in Valero Energy in Texas, USA in order to produce H2. In this paper, we would like to introduce status of China ECUST-ICCT gasification technology and find current issues in developing Korean gasification technology.