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In 2008, the PPR78 model (Predictive Peng–Robinson 1978) was extended to mercaptan-containing systems by adding the sulfhydryl group (SH), that is, by determining the values of the group-interaction parameters between the group SH and the fourteen other groups already present in the PPR78 model. Unfortunately, due to a lack of experimental data reported in the open literature, it was not possible...
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