The prediction of molar volume of saturated vapor can be calculated from many equations of state, some of these equations applied for both gas and liquid phase ,and some of them applied for gas phase only .
Turbulent drag-reduction efficiency of polyisobutylene with three different, very high molecular weights was studied in a build-up closed loop gas oil circulation system. The turbulent mode was produced via a positive displacement gear pump to avoid mechanical degradation of polymer chains during the experimental period. Three molecular weights 2.9*106 ,5.9*106 g/mol dissolved in reformate were used as additives in order to investigate the effect of molecular weight on drag-reduction rate and flow capacity increase.
Throughput increase by drag-reducing additives offers a suitable quick solution to meet increased demand by pipelining of oil or water which arises either permanently or seasonally. This has placed increased emphasis upon studies directed towards preparing efficient solutions of drag- reducer additives. Commercially available polyisobutylenes (Oppanol B types) of three different high molecular weights in addition to water soluble carboxymethylcellouse were chosen for the investigation.
