(413g) The Role of Different Hydroxyl Groups in Promoting Coke Formation during Lignin Pyrolysis

Catalytic pyrolysis of lignin to produce green chemicals involves analysis of various products and complicated thermochemical reactions. The investigation of polymerization and catalytic coking is the bottleneck problem in efficient conversion of lignin pyrolysis. The understanding of coke formation mechanism is important for synthesizing high-performance catalyst and improving the lignin conversion to target products. With the help of Py-TOF/MS system, the current proposal will study the polymerization process promoted by phenolic hydroxyl and aliphatic hydroxyl groups separately by capping them through chemical pretreatment. The extraction of coke within the catalyst and corresponding analysis with high resolution MS will help elucidate the mechanism of coke formation. Based on these findings, the relationship between lignin/pretreated lignin physiochemical properties and coke formation/product distribution will be revealed. Moreover, a reaction kinetic model is developed to simulate the reaction and obtain important reaction parameters.