Open AccessAn attrition-resistant zinc titanate sorbent for sulfur; [Quarterly] report, September 1--November 30, 1993
Author(s) -
J. H. Swisher,
W.S. O`Brien,
Rupali Gupta
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/143950
Subject(s) - sorbent , sulfidation , reactivity (psychology) , attrition , zinc , sulfur , materials science , chemical engineering , mineralogy , chemistry , metallurgy , adsorption , engineering , organic chemistry , medicine , dentistry , alternative medicine , pathology
In the continuing search for good sorbent materials to remove sulfur from hot, coal-derived gases, zinc titanate sorbents have shown great promise. The objective of this project is to extend the effort started last year on increasing the strength and durability of zinc titanate sorbents with little or no loss in chemical reactivity. The principle is to contain Zn{sub 2}TiO{sub 4} in a structural matrix of excess TiO{sub 2}. A fluidized bed test was completed this quarter on the first of two promising sorbent formulations. The chemical reactivity in the form of breakthrough curves became progressively better over ten sulfidation-regeneration cycles. While the chemical reactivity was very good, the attrition resistance was only fair, due presumably to the conversion of Zn{sub 2}TiO{sub 4} to ZnTiO{sub 3} during cycling. The next formulation to be tested is expected to be better in attrition resistance