Cryogenic bulk removal of H2S or CO2 offers an economic advantage when the separated acid gases from super sour gas are re-injected.
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The removal of acid gas components from highly or super-sour gases requires the optimum choice of process.
Siirtec Nigi’s Sulphur Degassing Technology can reduce the dissolved H2S concentration of tail gas to less than 10 ppmw. Read More ›
Case stydy shows that C-234 catalyst has very good activity and stability at low temperature (240℃) in tail gas treatment. Energy consumption and tail gas emissions can be reduced compared with the application of high-temperature catalyst. Read More ›
Selection of technolgies for the sulphur block must serve legislative demands and the efficient operation of upstream processes.
The feasability and economics of a two-stage sour water stripper with an SRU for NH3 contents of 25% and higher are discussed.
By incorporating a Claus unit, iron-based liquid redox processing can result in a removal efficiency of 99.9+% and 100% turndown capacity, as well as increasing Claus unit capacity.
Awareness of H2S removal process steps and how they can be combined to reduce costs compared to the use of a single sweetening unit operation. Modular process design and a phased investment to project implementation can reduce capital spending.
Solids formed when higher rates of NH3 are present in the Claus burner can plug demisters and condensers, and severely limit plant capacity. This article describes the safe limit of composition of Claus feedstocks and the design strategies of the sulphur plant to overcome these problems.
Historically available processes for large-scale SO2 recovery as elemental sulphur are inherently problematic in terms of operability, emissions, product quality and fuel consumption. An SO2 reduction process can overcome these drawbacks.