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Cyclic distillation uses a periodic operation mode that leads to key benefits, such as increased column throughput, lower energy requirements and much higher separation performance. By integrating chemical reactions with cyclic distillation, a novel process intensification approach is possible – catalytic cyclic distillation – which outperforms classic reactive distillation.This paper is the first...
In this study, a planetary MOCVD reactor was thermally analyzed and a numerical model was proposed to predict an actual thermal distribution, comparing the results between the numerical simulation and experiment. Numerical simulations were performed for various modifications, namely, the ceiling design and heat shield layout, to improve the heating efficiency. The reactors comprising the ceiling design...
In this study, the esterification reaction of acrylic acid and n-butanol to produce n-butyl acrylate and water was studied using the pervaporation–esterification hybrid process to perform the separation and reaction simultaneously to increase the conversion of limiting reactant. A Pervap 2201 polymeric membrane was used to separate water and also to shift the equilibrium. The Pervap 2201 membrane...
Palladium membranes were prepared on large tubes (80mm diameter and 150mm length) of porous stainless steel supports (PSS) using a modified electroless plating technique. The morphology of the palladium layer was found to be depending on the container material of the coating apparatus. The use of PMMA resulted in compact palladium layers with smooth surfaces whereas PTFE led to inhomogeneous palladium...
In this study, a new methodology is proposed based on using two periods of ultrasonication for the dehydration and desalting of heavy crude oil. For this purpose, ultrasonic irradiations are used under specified conditions such as irradiation input power, irradiation time and gap time after irradiation within a batch standing-wave resonator reactor. A serious problem with the commonly used single...
Membrane pervaporation experiments for dewatering of water–ethanol mixtures were conducted, using a polymeric hydrophilic membrane, under microwave and conventional heating in a multimode microwave oven and a convection oven, respectively. Three feed temperatures (33.5, 45.5 and 51.5°C) and two feed compositions (5.5wt% and 20wt% water in the feed) were considered. At 20wt% water content, higher water...
Tubular metallic membranes with pore diameters of 5 and 10μm have been used in a cross-flow unit to prepare monodisperse oil-in-water emulsions (O/W) with span values as low as 0.67, significantly lower than for emulsions prepared with a rotor–stator homogenizer. The influence of typical operating parameters (continuous phase flow rate and transmembrane pressure) on droplet size distribution was studied...
Amidst growing environmental awareness and stringent discharge regulations, chemical and allied process industries are now desperately seeking replacement of the conventional, polluting processes by clean and green processes. In this context, production and purification of amino acids like l-glutamic acid assumes significance. Concerned conventional process involves several steps like fermentation,...
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