Show navigation Number 02, June 2017 contents Nitrogen and Sulfur Oxides Emissions from Fuel Oil Combustion in Industrial Steel Reheat Furnace PP. 71-74 , Paper Code: EN033 Author: Hussein Abuluwefa and Adel Alnaas Effect of Archie’s constants on water saturation Estimation, Nubian Sandstone (Case Study) PP. 75-81 , Paper Code: EN034 Author:Bahia Ben Ghawar,Naima Elgariani,Ali Elghuddi and Mohamed Abdassalam Effects of Using Different Valves Types on Water Hammer Transients PP. 82-90 , Paper Code: EN035 Author: Sami AboBaker Elgssier Water Transients in Pipes Due to Value Oscillation PP. 91-97 , Paper Code: EN036 Author: Sami AboBaker Elgssier Perturbation-based Extremum Seeking Control Design for a Class of Nonlinear Systems PP. 98-108 , Paper Code: EN037 Author: Abdulhakim Daluom Web Application and Emulation for Traffic Monitoring Using Simulation Tool PP. 109-115 , Paper Code: IT006 Author: Laila A.Esmeda, Eman K.Ali and Salha I.Alhashani ISO 9001 Certification Gap Analysis: Case Study of a Libyan Organization PP. 116-126 , Paper Code: EN038 Author: Abdulfatah A. Altumi, Tarik H. Badi and Omer Elhashimi A Case Study on Caustic Corrosion in Refinery Piping PP. 127-129 , Paper Code: EN039 Author: Salem Ali Karrab Neural Network Approach to Cutting Tools Selection PP. 130-135 , Paper Code: EN040 Author: Saleh M. Amaitik Mass Transfer Performance of a Rotating Spiral: Comparison with Conventional Contacting Methods

Abstract

Previous work by the authors develops a novel technology for counter-current contacting of immiscible fluid phases based on a rotating spiral channel. The work has established theoretical modelling allowing prediction of mass transfer rates for physical absorption and desorption of dilute solute species and has verified the main hydrodynamic elements of the theory, with experimental measurements over a wide range of flow rates and liquid viscosity. A key feature of rotating spiral contacting is that the relative thicknesses of the phase layers is constant throughout the contacting process and, along with the relative phase flow rates, can be varied regardless of phase and solute properties to produce optimum conditions for the contacting. It has been shown that there are two criteria that determine the optimum. First, the flow rate ratio of the phases is matched to the equilibrium distribution of the solute between the two phases, so that sufficient solvent phase flows to allow full removal of solute from the processed stream. Second, the relative layer thicknesses should maximise specific throughput, i.e. the flow rate of the processed stream per device volume. These ideas of optimum contacting guide a comparison here of recent mass transfer data for the spiral with corresponding literature data for the packed column and rotating packed bed.