The “Petlyuk” or “dividing-wall” or “fully thermally coupled” distillation column is an interesting alternative to the conventional cascaded binary columns for separation of multi-component mixtures. However, the industrial use has been limited, and difficulties in operation have been reported as one reason. With three product compositions controlled, the system has two degrees of freedom left ...

The dividing wall column, DWC, is a thermally coupled sequence that can perform the separation of fluid mixtures with reduced energy consumption, but also decreasing the capital costs associated. Several authors have developed design procedures for this kind of sequence, using short methodologies or optimization strategies. The use of short procedures is easy and fast, but, in the most of the c...

Abstract In early project stages, often no simulation results are available for dividing‐wall columns. Hence, shortcut methods used to estimate suitable vapor and liquid splits. a previous paper, it was demonstrated that diagrams suited tool satisfy this need. However, has turned out shows weaknesses columns with finite or non‐optimal stages. This contribution closes gap presents an extended ap...

Seismic rehabilitation provides existing buildings with more resistance to seismic activity, ground motion, or geotechnical failure due to earthquakes. Performance-based rehabilitation is a general concept through which the retrofitting criteria are defined regarding to performance objectives when the structural and nonstructural members are subject to different levels of earthquake hazards. In...

in this study, it was shown that how co2 and h2s were removed from a natural gas stream, using a nanofluid containing nanoporous graphene in diehanolamine (dea). before running the experiments, the appropriate values were chosen for the nanosheet dosage and the liquid and gas flow rates in the absorption experiments, which were performed in a laboratory scale wetted wall column. in the experime...

In this work we present a new approach that use to simulate and optimize multiple dividing wall columns at the same time. Instead of considering all model equations as constraints process variables optimization in large highly nonlinear problem only incorporate subset variables. The remaining are calculated from by robust fast calculation procedure. This procedure also ensures satisfied. A comp...

Peptidoglycan synthesis and its fine chemical composition were studied in dividing cocci of Escherichia coli carrying the lov-1 mutation and in which the coccal shape was obtained either by mecillinam treatment or by transferring a pbpA mutation (penicillin-binding protein 2- phenotype), as compared to normal rods and non-dividing cocci. Synchronously dividing cocci showed peptidoglycan synthes...