This paper presents the retrofit of five conventional distillation trains for the separation of quaternary mixtures of hydrocarbons for feed compositions with high or low content of intermediate components. The retrofit implies the incorporation of liquid or vapour recycle streams among the conventional distillation columns. Each recycle stream removes one condenser or one reboiler. The introdu...

from 60 decade  sustainability issues  and sustainable developing  have opened a way in scientific meetings associated with  environment and urbanization and architecture. sustainability goals are improving of environment situation , less pollution  and at least interference on  land and interaction of  natural and artificial environment , that most of these cases attracted attention in archite...

This paper focuses on energetic aspects of the dynamics and control of process networks with high material recycle. Two prototype systems are analyzed, for which the large material recycle acts as an energy carrier, leading to a high energy throughput for the entire network. Using singular perturbation arguments, we show that the variables in the energy balance of these networks evolve in the f...

Attenuation of the world's reserves of conventional and nonrenewable energy has affected the industrial scene of the developing countries in a big way and stimulated the hunt for renewable and unconventional energy sources. In addition, treatment and disposal of huge tonnages of municipal solid waste ( MSW ) generated from the cities ( as a result of rapid urbanisation ) has emerged as a new en...

The influence of recycling on double-pass solar air collectors with welding of the V-corrugated absorber has been studied experimentally and theoretically. Welding the V-corrugated absorber and the recycle-effect concept to the solar air collector was proposed to strengthen the convective heat-transfer coefficient due to turbulence promotion. Both the recycle effect and the V-corrugated absorbe...