Assessment of Sorbent Reactivation by Water Hydration for Fluidized Bed Combustion Application

Author:

Montagnaro Fabio1,Salatino Piero2,Scala Fabrizio3,Wu Yinghai4,Anthony Edward J.4,Jia Lufei4

Affiliation:

1. Dipartimento di Chimica, Università degli Studi di Napoli Federico II, Complesso Universitario del Monte di Sant’Angelo, 80126 Napoli, Italy

2. Dipartimento di Ingegneria Chimica, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy

3. Istituto di Ricerche sulla Combustione, CNR, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy

4. CETC-O, Natural Resources Canada, 1 Haanel Drive, Ottawa, Ontario, Canada K1A 1M1

Abstract

Disposal of fluidized bed combustion (FBC) solid residues currently represents one of the major issues in FBC design and operation, and contributes significantly to its operating cost. This issue has triggered research activities on the enhancement of sorbent utilization for in situ sulfur removal. The present study addresses the effectiveness of the reactivation by liquid water hydration of FB spent sorbents. Two materials are considered in the study, namely the bottom ash from the operation of a full-scale utility FB boiler and the raw commercial limestone used in the same boiler. Hydration-reactivation tests were carried out at temperatures of 40°C and 80°C and for curing times ranging from 15minutes to 2d, depending on the sample. The influence of hydration conditions on the enhancement of sulfur utilization has been assessed. A combination of methods has been used to characterize the properties of liquid water-hydrated materials.

Publisher

ASME International

Subject

Geochemistry and Petrology,Mechanical Engineering,Energy Engineering and Power Technology,Fuel Technology,Renewable Energy, Sustainability and the Environment

Reference24 articles.

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2. High Temperature Desulphurization by Fine Limestone During Staged Fluidized-Bed Combustion;Khan;Can. J. Chem. Eng.

3. The Influence of Sorbent Properties and Reaction Temperature on Sorbent Attrition, Sulfur Uptake, and Particle Sulfation Pattern During Fluidized-Bed Desulfurization;Montagnaro;Combust. Sci. Technol.

4. Sulfation and Reactivation Characteristics of Nine Limestones;Laursen;Fuel

5. Experience in Sulphur Capture in the 20MW Chatham CFB Unit;Pickles

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