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

Abstract

A mathematical model has been developed to predict the performance of a continuous bubbling-fluidized-bed hot-gas desulfurization system in the integrated gasification combined cycle. For both the bubbling-fluidized-bed desulfurizer and the bubbling-fluidized-bed regenerator, the model combines the particle residence time with the kinetic rate in each reactor. The flow pattern of the solid phase was assumed to be well-mixed, and the flow pattern of the gas phase was assumed to be plug flow. The model has been applied to Korea Institute of Energy Research's laboratory-scale fluidized-bed process. The present model provides a reasonable fit in predicting the experimental result that the outlet concentration of H2S increased nearly proportionally to the inlet concentration of H2S in the desulfurizer. The sulfur concentration in both the desulfurizer and the regenerator was predicted to increase exponentially as the inlet concentration of H2S increased in the desulfurizer. The outlet concentration of H2S was predicted to decrease exponentially in the desulfurizer as the static bed height increased in both the desulfurizer and the regenerator. The outlet concentration of H2S was predicted to increase exponentially in the desulfurizer as the gas velocity increased in both the desulfurizer and the regenerator.

Kinetic Analysis of H2S Removal over Mesoporous Cu–Mn Mixed Oxide/SBA-15 and La–Mn Mixed Oxide/KIT-6 Sorbents during Hot Coal Gas Desulfurization Using the Deactivation Kinetics Model

“…A large amount of work has been performed on the kinetics model for hot coal gas desulfurization, − and there appeared some adsorption kinetics models, such as the pseudo-first-order (PFO), pseudo-second-order (PSO), , modified pseudo- n -order (MP n O), and mixed-order (MOE) rate equations, and the fractal-like kinetics model …”

A cross‐flow rotating packed bed toward desulphurization of marine exhaust gas

“…In conventional desulphurization processes, increasing the reactor size is a common approach to fulfil the requirement of higher emission standards. [15,16] However, the available space for offshore platforms such as ships is limited, which restricts the size of the desulphurization device. A rotating packed bed (RPB) is a typical process intensification equipment that can greatly enhance the mass transfer and micromixing efficiency and reduce the reactor volume.…”

Numerical Study of Gas−Solid Flow in a Radial-Inlet Structure Cyclone Separator

“…The opposed multi-burner (OMB) gasification system consists of coal treatment, coal gasifier, gas cleanup, and black water treatment processes. − The gas cleanup process, which runs at high temperatures and pressures, plays an important role in the whole system. It removes the particles from syngas produced in the gasifier before it reaches downstream . Unlike the syngas purification in GE gasification technology, in the OMB gasification purification process, a combination of mixer, cyclone, and scrubber is adopted.…”

“…It removes the particles from syngas produced in the gasifier before it reaches downstream. 4 Unlike the syngas purification in GE gasification technology, in the OMB gasification purification process, a combination of mixer, cyclone, and scrubber is adopted. The existence of the cyclone improves the purification effect and stabilizes the system operation.…”