EUBCE 2026 - Alda J. RODRIGUES - Simulation of an Integrated Dual-Bed Reactor for Combined Dechlorination and Desulfurization of Gasification Syngas

Simulation of an Integrated Dual-Bed Reactor for Combined Dechlorination and Desulfurization of Gasification Syngas

Short Introductive summary

Syngas from biomass and municipal solid waste (MSW) gasification contains contaminants such as hydrogen chloride (HCl), hydrogen sulphide (H?S), and carbonyl sulphide (COS), which can cause corrosion, catalyst poisoning, and instability in downstream fuel synthesis. High-temperature sorbent-based systems are widely used for gas cleanup, with sodium-based sorbents achieving 90% HCl removal at 500–700 °C and ZnO-based sorbents reaching 99% H?S removal. In industrial practice, dechlorination and desulfurization are often integrated within a single reactor operating under shared conditions, despite differing optimal requirements. This study evaluates the operational envelope of a dual-bed purification reactor for simultaneous chlorine and sulphur removal from biomass- and MSW-derived syngas. Aspen HYSYS simulations were performed to assess the effects of temperature, pressure, syngas composition, and sorbent dosage on HCl, H?S, and COS removal. Results show that removal efficiencies above 90% for HCl and H?S are achieved at 500–600 °C and pressures above ~500 kPa. HCl removal is primarily temperature-driven, while H?S removal depends more on pressure and sorbent availability.

G. Talero, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL
O. Alves, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL
B. Garcia, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL
G. Lourinho, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL
A.J. Rodrigues, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL
J. Bernardo, CoLAB BIOREF, São Mamede de Infesta, PORTUGAL