This paper discusses the operating experience of new, accelerated Shell solvent formulations (ADIP-X and Sulfinol-X processes) during a 15-month period at the Rosita Plant in Texas. A comparison of Shell solvents for CO2 removal, ADIP-X, Sulfinol-D, and Sulfinol-X, illustrates where these technologies should be applied. Sulfinol-D is the most attractive technology for applications where CO2 is the limiting constraint to remove and the CO2 partial pressure is below 30 psia, based on the lower process energy requirements. Above a CO2 partial pressure of 50 psia, the ADIP-X technology is more attractive due to its higher loading capacity, I.e., offering lower capital and energy requirement. Between 30 and 50 psia both ADIP-X and Sulfinol-X technologies are competitive with respect to capital and energy requirements, and selection depends on process line-up and integrated process options. The accelerated Shell Sulfinol solvent (the Sulfinol-X process), will be the preferred solution over a range of applications, specifically for de-bottlenecking options and for bulk removal. The advantage of the use of the Sulfinol solvent may also be based on the capability to remove organic sulfur components other than H2S from the gas.
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