Simultaneous experiments of sulfidation and regeneration in two pressurized fluidized-bed reactors for hot gas desulfurization of IGCC

Modeling the Desulfurization Characteristics of a Continuous Bubbling-Fluidized-Bed Hot-Gas Cleanup System

“…In the actual process, an underflow standpipe and a calibrated slide valve are located below each reactor to control the reactor bed level by maintaining the solid circulation rate . The fresh feed rate F 0 and the return rate of solid F f10 are controlled to maintain fixed values of F 1 , W 1 , and W 2 for the given fluidizing condition.…”

“…The hot-gas cleanup system used to remove H 2 S and COS consists of desulfurization and regeneration reactors. − Fluidized-bed reactors are used in the cleanup system because they have several potential advantages including excellent gas−solid contact, ability to add or remove sorbent continuously, excellent temperature control of the highly exothermic regeneration reaction, faster overall kinetics associated with using smaller particles, and continuous steady-state operation. H 2 S and COS are removed from coal gas by sorbent in the desulfurizer.…”

“…Therefore, the key to this technology is the development of the effective sorbent and reactor system. Sorbents developed for sulfur removal are primarily zinc oxide based inorganic materials because of their ability to reduce the fuel gas sulfur level to a few parts per million. , There are some reports − ,, that provide detailed information about process development and modeling. Through quite expensive experiments, − they provide valuable data on the process performance obtained from the continuous process using a bubbling or pneumatic transport-bed desulfurizer and a bubbling-bed regenerator.…”

“…Sorbents developed for sulfur removal are primarily zinc oxide based inorganic materials because of their ability to reduce the fuel gas sulfur level to a few parts per million. , There are some reports − ,, that provide detailed information about process development and modeling. Through quite expensive experiments, − they provide valuable data on the process performance obtained from the continuous process using a bubbling or pneumatic transport-bed desulfurizer and a bubbling-bed regenerator. Yi and Luyben 9 developed a dynamic model of the bubbling-fluidized-bed desulfurizer/regenerator system for the hot-gas desulfurization process.…”

“…The purpose of this study was to develop a simplified model for predicting the performance of a continuous steady-state bubbling-fluidized-bed hot-gas desulfurization system using a zinc titanate sorbent in support of the Korea Institute of Energy Research's (KIER's) process development. , In the study, the particle residence time in each reactor is determined from the particle population balance, the conversion of the sorbent particle in each reactor is determined by combining reaction kinetics with the particle residence time, and the performance of the system is estimated by summation of conversion of each particle …”