A Comprehensive Review of H2S Scavenger Technologies from Oil and Gas Streams. Issue 6 (18th August 2017)

• Record Type: Journal Article
• Authors: Agbroko, Obakore W.; Piler, Karishma; Benson, Tracy J.
• Is Part Of: ChemBioEng reviews. Volume 4:Issue 6(2017)
• Page Start: 339
• Page End: 359
• Publication Date: 2017-08-18
• Subjects: Amine -- Crude oil -- Designer scavenger -- Hydrogen sulfide scavengers; Chemical engineering -- Periodicals; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; 660.05
• DOI: 10.1002/cben.201600026
• Languages: English
• ISSNs: 2196-9744

Abstract

Abstract: Sour crudes containing > 0.5 % sulfur are of low quality and cause harm to equipment, the environment, and to humans. Therefore, sustainable measures for crude oil sweetening are of significant importance. Removal of H2 S directly at the wellhead before the transport increases the value of crude oil and may be necessary to adhere to legal transport laws. Chemical agents known as scavengers are used to scrub H2 S from crude oils. Scavengers are either of the regenerative or non‐regenerative type and are used depending on the pH or water content of the crude stream. The literature has been surveyed to reveal those absorbents that allow the most effective scavenging of H2 S at wellhead applications. The chemical processing, including recovery of scavenger or end use of products, is discussed for decision‐making at the confluence of chemistry and chemical engineering for H2 S removal. This work investigates how and why some scavengers perform better for some crudes and environmental conditions than others with the intent to develop designer scavengers and processing conditions for the crude oil industry. Abstract : H2 S in oil and gas streams causes corrosion and fouling of industrial equipment and also presents a danger for humans. Chemical scavengers used to reduce the H2 S vary depending on the pH and aqueous content of the crude and the amount to be removed. Regenerative and non‐regenerative scavengers are reviewed to discuss their performance and ability to meet legal transport laws and downstream processing requirements.