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Title: Zinc titanate sorbents

Abstract

The present invention provides a zinc titanate sorbent material useful in desulfurization applications. The zinc titanate material is in the form of generally spherical particles of substantially uniform chemical distribution. The sorbent material is capable of absorbing sulfur compounds from a gaseous feed in an amount of at least about 15 weight percent based on the weight of the sorbent. The sorbent material is prepared by a process including: (a) forming a zinc oxide/titanium dioxide dry blend, (b) preparing a substantially uniform aqueous slurry comprising the zinc oxide/titanium dioxide dry blend, organic binder, and at least about 1 weight percent inorganic binder based on the solids weight of the slurry, (c) spray drying the slurry to produce substantially spherical particles, and (d) calcining the particles at a temperature of between about 750.degree. C. to about 950.degree. C. The dry blend is formed by mixing between about 0.5 to about 2 parts zinc oxide having a median particle size of less than about 0.5 .mu., and about 1 part titanium dioxide having a median particle size of less than about 1 .mu.. The slurry contains substantially no free silica and may be prepared by the process including (1) preparing an aqueousmore » solution of organic binder, (2) adding the dry blend to the aqueous solution of organic binder, and (3) adding the inorganic binder to the solution of organic binder, and blend. Additional reagents, such as a surfactant, may also be incorporated into the sorbent material. The present invention also provides a process for desulfurizing a gaseous stream. The process includes passing a gaseous stream through a reactor containing an attrition resistant zinc titanate sorbent material of the present invention.« less

Inventors:
 [1];  [1];  [2]
  1. Durham, NC
  2. Germantown, MD
Publication Date:
Research Org.:
RTI International, Research Triangle Park, NC (United States)
OSTI Identifier:
871352
Patent Number(s):
US 5714431
Assignee:
Research Triangle Institute (Research Triangle Park, NC)
DOE Contract Number:  
AC21-88MC25006
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
zinc; titanate; sorbents; provides; sorbent; material; useful; desulfurization; applications; form; spherical; particles; substantially; uniform; chemical; distribution; capable; absorbing; sulfur; compounds; gaseous; feed; amount; 15; weight; percent; based; prepared; process; including; forming; oxide; titanium; dioxide; dry; blend; preparing; aqueous; slurry; comprising; organic; binder; inorganic; solids; spray; drying; produce; calcining; temperature; 750; degree; 950; formed; mixing; median; particle; size; contains; free; silica; solution; adding; additional; reagents; surfactant; incorporated; desulfurizing; stream; passing; reactor; containing; attrition; resistant; percent based; zinc titanate; material useful; slurry comprising; organic binder; process including; spherical particles; reactor containing; gaseous stream; zinc oxide; weight percent; aqueous solution; particle size; substantially uniform; titanium dioxide; aqueous slurry; sorbent material; sulfur compounds; substantially spherical; gaseous feed; spray drying; produce substantially; inorganic binder; attrition resistant; titanate material; titanate sorbents; titanate sorbent; uniform chemical; sulfur compound; spherical particle; /502/

Citation Formats

Gupta, Raghubir P, Gangwal, Santosh K, and Jain, Suresh C. Zinc titanate sorbents. United States: N. p., 1998. Web.
Gupta, Raghubir P, Gangwal, Santosh K, & Jain, Suresh C. Zinc titanate sorbents. United States.
Gupta, Raghubir P, Gangwal, Santosh K, and Jain, Suresh C. 1998. "Zinc titanate sorbents". United States. https://www.osti.gov/servlets/purl/871352.
@article{osti_871352,
title = {Zinc titanate sorbents},
author = {Gupta, Raghubir P and Gangwal, Santosh K and Jain, Suresh C},
abstractNote = {The present invention provides a zinc titanate sorbent material useful in desulfurization applications. The zinc titanate material is in the form of generally spherical particles of substantially uniform chemical distribution. The sorbent material is capable of absorbing sulfur compounds from a gaseous feed in an amount of at least about 15 weight percent based on the weight of the sorbent. The sorbent material is prepared by a process including: (a) forming a zinc oxide/titanium dioxide dry blend, (b) preparing a substantially uniform aqueous slurry comprising the zinc oxide/titanium dioxide dry blend, organic binder, and at least about 1 weight percent inorganic binder based on the solids weight of the slurry, (c) spray drying the slurry to produce substantially spherical particles, and (d) calcining the particles at a temperature of between about 750.degree. C. to about 950.degree. C. The dry blend is formed by mixing between about 0.5 to about 2 parts zinc oxide having a median particle size of less than about 0.5 .mu., and about 1 part titanium dioxide having a median particle size of less than about 1 .mu.. The slurry contains substantially no free silica and may be prepared by the process including (1) preparing an aqueous solution of organic binder, (2) adding the dry blend to the aqueous solution of organic binder, and (3) adding the inorganic binder to the solution of organic binder, and blend. Additional reagents, such as a surfactant, may also be incorporated into the sorbent material. The present invention also provides a process for desulfurizing a gaseous stream. The process includes passing a gaseous stream through a reactor containing an attrition resistant zinc titanate sorbent material of the present invention.},
doi = {},
url = {https://www.osti.gov/biblio/871352}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}