Effect of the demethanizer improved control strategy on the separation train for the NGL separation process

In recent years the attention on natural gas production and utilization is growing due to different fundamental aspects. First, availability of has increased thanks technological improvements in extraction techniques that have made possible from unconventional reservoirs. Second, interest clean energy growing, aiming reduce CO2 emission thus global warming. Natural a cleaner fossil fuel compared with other traditional sources such as oil coal. Another reason drives this increasing economic recovering heavier hydrocarbon fractions contained it. The fractionation liquids (NGL) an energy-demanding process, often conducted separation train includes cryogenic distillation columns. This work intended show how achieve energy-efficient recovery NGLs proper control strategy without composition analyzers. particular, effects combined cascade boilup approximation plus pressure compensator for demethanizer section, desired NGL product targets are investigated under feed flowrate disturbances conventional direct temperature controllers. Overall, it shown provides best performance lowest consumption.