Abstract-Optimization of pyrolysis efficiency based on optical property of semicoke in terahertz region

• Yi Z. Li^a, 
• Shi X. Wu^b, 
• Xiao L. Yu^c, 
• Ri M. Bao^a, 
• Zhi K. Wu^a, 
• Wei Wang^a, 
• Hong L. Zhan^a, 
• Kun Zhao^a, , ,
• Yue Ma^a, 
• Jian X. Wu^a, 
• Shao H. Liu^a, 
• Shu Y. Li^a

• ^a Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing 102249, China
• ^b Petroleum Exploration and Production Research Institute, China Petroleum and Chemical Corporation, 100083, China
• ^c Institute of Petroleum Geology, Sinopec Oil Exploration and Development Research Institute, Wuxi 214126, China

http://www.sciencedirect.com/science/article/pii/S036054421730378X

The correlation between pyrolysis conditions and fuel production has been extensively studied. Terahertz parameters, instead of thermal kinetic parameters, were investigated to reveal such interior correlation in this work. Different ventilating rate (V), heating rate (β) and final temperature (T) were controlled in several pyrolysis experiments of oil shale to prepare semicoke with varied amount of oil content, respectively. It was observed that V =0.6 L/min, β=15 °C/min and T=550 °C were the expected conditions to produce fuel. The critical points in terahertz parameter corresponded well with that in oil yield. Intervals where increasing V, β and T contributed to oil yield best can be determined by comparing the trend of absorption index at 0.4, 0.6, 0.8, 1.0 THz. Therefore terahertz parameter of semicoke may characterize the organic matter in semicoke that may convert to additional fuel and terahertz method can be applied to optimize pyrolysis efficiency.