GRI field testing of direct-injection H{sub 2}S scavenging
Gas Research Institute (GRI) is sponsoring an evaluation program for hydrogen sulfide (H{sub 2}S) scavenging technologies as part of an overall sulfur removal/recovery research program. One goal of this work is to develop a better fundamental understanding of direct-injection scavenging (injecting scavenging chemicals directly into a pipeline). The US natural gas industry is projected to spend an estimated $50 million/yr on H{sub 2}S scavenging chemicals by the year 2005, and it is believed that significant cost savings can result from improved application of direct-injection scavenging. This paper describes the results of the 1997--1998 testing from the direct-injection test facility built at a site in South Texas. The field test loop allows testing of 0--30 MMscfd of sour natural gas at 1,000 psig and 100 F through either a 6 inch or 2 inch test line approximately 250 feet in length. The loop allows measurement of H{sub 2}S removal, natural gas flow rate and chemical usage over a range of flow velocities, gas/liquid contact times, injection configurations and mixing conditions. The first phase of testing focused on measurement of the fundamental dependence of H{sub 2}S removal and triazine chemical usage on the flow and mixing conditions within the pipeline. This phase included parametric testing over the full range of gas and liquid flow rates, 0--30 MMscfd and 0--4 gal/hr, respectively, for both the 2 inch and 6 inch pipelines. The second and third phases measured the performance of potential improvements, e.g., in-line static mixers, the use of alternate scavenging agents and novel in-line contactor devices.
- Research Organization:
- Radian International, Austin, TX (US)
- OSTI ID:
- 20000900
- Report Number(s):
- CONF-990331--
- Country of Publication:
- United States
- Language:
- English
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