저급 석탄과 혼합한 폐촉매의 수증기 가스화 반응에 미치는 영향

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 23; no. 6; pp. 647 - 653
• Main Authors: 곽재훈(Jae Hoon Kwak), 서석진(Seok Jin Seo), 이소정(So Jung Lee), 송병호(Bung Ho Song), 손정민(Jung Min Sohn)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2012
• Subjects: 기계공학; steam gasification; Lignite; 속도론; Low rank coal; 갈탄; 저급 석탄; kinetics; 수증기 가스화; 열천칭기; thermobalance
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2012.23.6.647

We have investigated the kinetics and activity of waste catalysts for steam-lignite gasification. Waste catalysts I, II, III and reference $K_2CO_3$ were used and physical mixed with a coal. The gasification experiments were carried out with the low rank coal loaded with 1 wt% and 5 wt% catalyst at the temperature range from 700 to $900^{\circ}C$ using thermobalance reactor. It was observed that the carbon conversion reached almost 100% regardless of the kinds of catalysts at $900^{\circ}C$. The shortest time to reach the designated conversion was obtained for 1 wt% waste catalyst II and 5 wt% $K_2CO_3$ at $900^{\circ}C$. The gasification reaction rate constant increased with increasing the temperature. Highest rate constant was obtained with $K_2CO_3$ at $900^{\circ}C$. The lowest activation energy was 69.42 kJ/mol for 5 wt% waste catalyst II. The waste catalyst had an influence on the reduction of activation energy.