A Low Cost, Long Life Zinc Oxide Based Sorbent

EPA Contract Number: 68D40028
Title: A Low Cost, Long Life Zinc Oxide Based Sorbent
Investigators: Copeland, Robert
Small Business: TDA Research Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1994 through March 1, 1995
Project Amount: $55,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1994) RFA Text |  Recipients Lists
Research Category: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)


Coal fired Gasifer Combined Cycles (GCC) have both high efficiency and very low emissions. A critical need for GCCs is a method of removing H2S produced from the sulfur in the coal from the hot gases. There has been extensive research on hot gas clean-up systems, focused on the use of a zinc oxide based sorbent (e.g., zinc titanate). Zinc titanate is the current sorbent of choice but is fairly expensive. The reasons are that the titania is expensive, and the sorbent can be used for only a few (less than 20) cycles before it falls apart.

TDA Research, Inc., has identified a new method to reduce the cost of the sorbent and increase sorbent life. They have developed the sorbent production method with a different type of sorbent (tin oxide). The new method produced pellets with an estimated average life of more than 200 cycles under hot gas cleanup conditions. The method should be directly applicable to preparing long life, low cost sorbents containing zinc oxide. This Phase I project will demonstrate that their process can be adapted to the leading sorbent (ZnO), optimize the sorbent composition, and measure cyclic life.

Supplemental Keywords:

Hot Gas Cleanup, Zinc Oxide, Zinc Titanate, Hydrogen Sulfide, Sulfur Removal., RFA, Scientific Discipline, Air, Toxics, Sustainable Industry/Business, Chemical Engineering, air toxics, Sustainable Environment, cleaner production/pollution prevention, Environmental Chemistry, Chemistry, HAPS, Technology for Sustainable Environment, Engineering, Chemistry, & Physics, EPCRA, Environmental Engineering, hot gas clean-up, zinc titanate, hot gas clean up, Hydrogen sulfide(See Modification), coal fired gasifer combined cycles (GCC), sorbent technology, sulfur, Hydrogen sulfide, sorbents, hot gas stream, zinc oxide, long-life sorbent, hot gas streams, removal

Progress and Final Reports:

  • Final
  • SBIR Phase II:

    A Low Cost, Long Life Zinc Oxide Based Sorbent