Direct Sulfur RecoveryEPA Contract Number: 68D30083
Title: Direct Sulfur Recovery
Investigators: Nelson, Sid
Small Business: Sorbent Technologies Corporation
EPA Contact: Manager, SBIR Program
Project Period: September 1, 1993 through October 1, 1995
Project Amount: $150,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1993) Recipients Lists
Research Category: Air Quality and Air Toxics , SBIR - Air Pollution , Small Business Innovation Research (SBIR)
Description:The objective of the proposed project is to develop and demonstrate a low-cost alternative to a modified Claus plant for conversion of SO2 to elemental sulfur. More specifically, the objectives are to optimize an existing acid-rain sorbent regeneration process developed by Sorbent Technologies Corporation to yield directly a pure elemental sulfur product and to apply the technology to gas streams having a wide range of compositions.
In Phase I, of three strategies examined to increase elemental sulfur yields, one strategy, gas recycling, was observed to be exceptionally effective, yielding 100% conversion of the sulfur released during regeneration to elemental sulfur, with no sulfur species remaining in the exiting gas. Later, an important discovery was made. It was observed that MgO or TiO2 will act as a catalyst for the direct conversion of SO2 to elemental sulfur.
In Phase II, the research in Phase I will be carried forward. The technology will be scaled up to a larger size, evaluated in continuous long-term runs, and optimized.