Comparison of two different hot-gas desulfurization powder processes: Transport reactor and bubbling fluidized bed

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Vol. 21; no. 2; pp. 119 - 124
• Main Authors: Yi, Chang-Keun, Son, Jae-Ek
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2010
• Subjects: Bubbling; Bubbling fluidized bed; Density; Desulfurizing; Gas cleanup by powder; Hot-gas desulfurization; IGCC; Reactors; Regenerators; Sulfur; Temperature control; Transport; Transport reactor; Gas cleanup by powder; Transport reactor; Hot-gas desulfurization; IGCC; Bubbling fluidized bed
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2009.12.004

The KIER bench-scale fluidized hot-gas desulfurization process was designed to operate two different configurations. One was a bubbling desulfurizer and a bubbling regenerator, the other was a transport desulfurizer and a bubbling regenerator. Two systems were compared each other in terms of operational parameters, hydrodynamic parameters such as gas flow rate and solid circulation rate, reaction characteristics such as sorbent sulfur sorption capacity and regeneration characteristics. Also, the fresh and used solid samples from two different modes were analyzed for density, sulfur content, size, attrition, and morphology. The transport–bubbling system was simpler and more stable in pressure balance, but a little more unstable in temperature control than the bubbling–bubbling system. The solid residence time in each reactor was 0.68 h for the bubbling–bubbling system, and 0.09 h for the transport–bubbling system.