Solvent conversion at Canadian plant hikes sales gas, cuts CO2, S emissions

Shell Canada’s conversion of the sour-gas treating solvent at its Burnt Timber gas plant from a Sulfinol-D solution to methyl diethanolamine (MDEA) increased processed sales-gas volumes and heating value, improved sulfur-recovery-unit performance, and reduced CO2 and sulfur emissions.The project was initiated primarily to offset the impact of higher CO2 concentrations forecast in the incoming raw gas and to increase plant capacity.Higher CO2 content in the raw gas adversely affected the gas-treating unit as well as the sulfur-recovery unit.MDEA was favored for its selectivity towards absorption of H2S over CO2 and the relatively low coabsorption of hydrocarbons.ProblemsShell Canada&...

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