Paqell Thiopaq O&G

Meeting Demand Amid Higher Desulphurisation Standards

Shell partners to provide Paqell’s Thiopaq O&G process, an industry-leading bio-desulphurisation technology. Naturally occurring bacteria is used to oxidise H₂S into elemental sulphur, which can then be repurposed as fertiliser or for other refinery functions. Shell’s mix of technology and procedures can help gas processing facilities, refineries and other heavy industries meet compliance standards, maintain sustainable business practices, and improve profit margins. 

Higher Desulphurisation Standards than Ever Before

With more stringent sulphur demands on industry, getting the most out of desulphurisation techniques and technologies is critical. The simplicity of the technology is based on a gas stream containing hydrogen sulphide contacting an aqueous mild caustic solution in an absorber. The H₂S is captured as sulphite and stays in the solution to be converted into elemental sulphur by bacteria in the bioreactor.

The resulting bio-sulphur can be landfill suitable in many countries, has agricultural applications, and can be repurposed into other common products.

The sulphur produced is hydrophilic in nature which limits plugging or blocking problems. Additionally, there are lower upfront capital requirements and operating expenditures. Operators can use this budget-friendly option without sacrificing product quality.

• THIOPAQ O&G as AGRU: The process often replaces a complete train for H₂S removal and sulphur recovery while lowering the total equipment requirements.
• THIOPAQ O&G as a SRU or Tail Gas unit: When an amine unit is still required, a single THIOPAQ O&G unit often replaces the sulphur recovery unit, the tail gas treating unit, the degasser and, at times, the incinerator.