Advanced Syngas Upgrading Process for Conversion of Low-Rank Coals to Liquid Fuels

作     者：Andrew Lucero Amit Goyal Kevin McCabe Gerald Choi Haoren Lu Santosh Gangwal 

作者机构：Southern Research 5201 International Dr. Durham NC 27712 USA Nexant Inc. 101 2nd Street lOth Floor San Francisco 94105 CA 

出 版 物：《Journal of Geological Resource and Engineering》 (地质资源与工程（英文版）)

年 卷 期：2016年第4卷第5期

页      面：210-217页

学科分类：07[理学] 

主　　题：Steam reforming CTL gasifier syngas cleanup Fischer-Tropsch. 

摘      要：Syngas cleanup is a major challenge in any coal or biomass gasification application. A modified syngas cleanup process is under development to improve syngas from low rank coals for CTL （coal to liquids） applications. Novel steam reforming catalysts were developed to convert tars and light hydrocarbons and decompose ammonia in the presence of syngas contaminants such as H2S （〈 500 ppm）. Process goals are to improve syngas yield and H2：CO ratio while reducing water gas shift and downstream gas cleanup requirements. Laboratory reforming experiments were focused on developing information to support a techno-economic analysis using TRIG （transport reactor integrated gasifiers） or LURGI gasifiers. A CTL with carbon capture model was developed to compare the economics of the new process including the catalytic steam reforming to DOE （Department of Energy） baseline CTL. Reforming catalysts were developed that had high methane, tar, and ammonia conversion in presence of 90 ppm H2S. Higher concentrations of H2S affected conversion of methane but catalyst performance was fairly stable for the duration of testing. Results of modeling indicated that economics of the new process were nearly identical to the baseline CTL case, but greenhouse gas emissions for a given production of fuels were approximately 50% lower.