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Title: Mechanistic and kinetic studies of high-temperature coal gas desulfurization sorbents

Abstract

The overall objective of this project was to investigate the properties of and evaluate mixed oxides of zinc and titanium for hot fuel gas desulfurization. Uncombined ZnO was also investigated as a base case. Detailed investigation of the reduction and sulfidation reactions of Zn-Ti-O sorbents was performed. The intrinsic kinetics and the product layer diffusion rates in reduction and sulfidation were determined. Kinetic experiments with sorbents containing various Zn/Ti atomic ratios were performed. Chemical phase and structural transformations were followed by various methods. The results were compared to similar experiments performed with ZnO. The purpose of these experiments was to determine how the presence of titanium dioxide affects the reduction and sulfidation of ZnO. This information would be used to identify and select the sorbent composition that gives the best combination of low reduction rate and acceptable sulfidation performance at temperatures exceeding 600{degree}C. (VC)

Authors:
; ;
Publication Date:
Research Org.:
Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6253181
Report Number(s):
DOE/PC/88927-12
ON: DE92004184
DOE Contract Number:  
FG22-88PC88927
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; FUEL GAS; DESULFURIZATION; TITANIUM OXIDES; EVALUATION; QUANTITY RATIO; SORPTIVE PROPERTIES; ZINC OXIDES; CHEMICAL REACTION KINETICS; HOT GAS CLEANUP; PHASE STUDIES; PROGRESS REPORT; REDUCTION; SULFIDATION; CHALCOGENIDES; CHEMICAL REACTIONS; DOCUMENT TYPES; FLUIDS; FUELS; GAS FUELS; GASES; KINETICS; OXIDES; OXYGEN COMPOUNDS; PURIFICATION; REACTION KINETICS; SURFACE PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZINC COMPOUNDS; 010402* - Coal, Lignite, & Peat- Purification & Upgrading

Citation Formats

Lew, S., Flytzani-Stephanopoulos, M., and Sarofim, A. F. Mechanistic and kinetic studies of high-temperature coal gas desulfurization sorbents. United States: N. p., 1991. Web. doi:10.2172/6253181.
Lew, S., Flytzani-Stephanopoulos, M., & Sarofim, A. F. Mechanistic and kinetic studies of high-temperature coal gas desulfurization sorbents. United States. https://doi.org/10.2172/6253181
Lew, S., Flytzani-Stephanopoulos, M., and Sarofim, A. F. 1991. "Mechanistic and kinetic studies of high-temperature coal gas desulfurization sorbents". United States. https://doi.org/10.2172/6253181. https://www.osti.gov/servlets/purl/6253181.
@article{osti_6253181,
title = {Mechanistic and kinetic studies of high-temperature coal gas desulfurization sorbents},
author = {Lew, S. and Flytzani-Stephanopoulos, M. and Sarofim, A. F.},
abstractNote = {The overall objective of this project was to investigate the properties of and evaluate mixed oxides of zinc and titanium for hot fuel gas desulfurization. Uncombined ZnO was also investigated as a base case. Detailed investigation of the reduction and sulfidation reactions of Zn-Ti-O sorbents was performed. The intrinsic kinetics and the product layer diffusion rates in reduction and sulfidation were determined. Kinetic experiments with sorbents containing various Zn/Ti atomic ratios were performed. Chemical phase and structural transformations were followed by various methods. The results were compared to similar experiments performed with ZnO. The purpose of these experiments was to determine how the presence of titanium dioxide affects the reduction and sulfidation of ZnO. This information would be used to identify and select the sorbent composition that gives the best combination of low reduction rate and acceptable sulfidation performance at temperatures exceeding 600{degree}C. (VC)},
doi = {10.2172/6253181},
url = {https://www.osti.gov/biblio/6253181}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1991},
month = {Tue Oct 01 00:00:00 EDT 1991}
}