the increasing use of styrene, for the production of thermoplastics and rubbers, has given a special importance to this vital materialin petrochemical industries. more than 95 per cent of styrene production in the world is by dehydrogenation of ethylbenzene. present styrene production units are basically designed on the basis of 1940s units. producing countries and related research centres have...

Global optimization for sustainable design and synthesis of a large-scale algae processing network under economic and environmental criteria is addressed. An algae processing network superstructure including 7800 processing routes is proposed. Based on the superstructure, a multiobjective mixed-integer nonlinear programming (MINLP) model is developed to simultaneously optimize the unit cost and...

The crank unit is defined as the basic unit of the crank-group driving mechanism for the modular design and production, and the balance methods of inertia force are researched on the crank unit in crank-group driving mechanism’s modular design. The factors affecting the balance weight’s position and mass are studied. This indicates that the product of the mass and gyration radius of the balance...

The traditional data envelopment analysis (DEA) models treat a decision making unit (DMU) as a “black box”, which is often criticized for not considering the inner production mechanism of a production system. The network DEA models developed to overcome this deficiency by considering the internal structure of a DMU have recently gained popularity. The inner data, however, are not generally avai...

in this research, feasibility study of integrating thermal desalination unit with gas turbine (gt) has been investigated using retrofit and grass root design techniques  for lavan island oil refinery which is located in persian gulf. according to computed parameters on developed code for the power generation unit no.1 using ees (engineering equation solver) software, thermal efficiency of the g...

In this article the place and capacity of combined heat and power [CHP] prediction unit wasdetermined dynamically with use of modified particle swarm optimization (MPSO). It was done inoptimization palace and with a capacity of CHP as a production resource with the aim to increasethe reliability capacity. Decrease the loss and provide the electrical and thermal energies ofindustrial city. The f...

Activated charcoal can be obtained in many ways. The most promising terms of resource saving and economic benefits is the method obtaining activated carbon from organic waste by slow conductive pyrolysis. As a result such thermochemical conversion, biochar volatile products - condensable non-condensable are formed, which used as fuel for operation pyrolysis reactors. Modeling thermal decomposit...