A Shortcut Method for the Estimation of Structured Packings HEPT in Distillation

Abstract

A shortcut method to calculate HETP for metal structured packings is proposed. The method is a simplification and extension of Lockett's equation for sheet packings, based on the Bravo, Rocha and Fair model. It is applicable at vacuum or pressure distillation of organic or aqueous mixtures in columns of sheet and gauze packings. The necessary variables are specific surface of packing, density of vapor and liquid and flow (when gauze packings are being considered). No estimation of hydrodynamic conditions is necessary.

HETP evaluation of structured packing distillation column

“…The HETP values obtained with the only empirical correlation [Carrillo et al (2000)], from tests performed with Sulzer BX (500 m 2 /m 3 ), which is similar to the gauze packing in QVF column, seemed more reliable than the ones using the theoretical models. That correlation has the advantage that no mass transfer coefficients and effective areas are needed.…”

“…It is our purpose in this work to make a comparison between the SRP model [Bravo, Rocha and Fair (1985) and Fair (1993, 1996)], the Delft model [Olujić et al (2004)], Brunazzi's [Brunazzi and Pagliant (1997)], Carlo's [Carlo, Olujić and Pagliant (2006)] and Carrillo´s models [Carrillo et al (2000)] in terms of performance evaluation of CSSP columns. Prior to the experimental tests, simulation studies using the commercial software PRO/II ® were performed in order to establish the optimum operational conditions for the distillation, especially concerning operating pressure, top and bottom temperatures, feed location and reflux ratio.…”

Synthesis of dimethyl carbonate and propylene glycol in a pilot-scale reactive distillation column: Experimental investigation, modeling and process analysis

“…The height of each stage was equivalent to the height equivalent to a theoretical plate (HETP) of the used packing. To calculate the HETP value of the applied Sulzer BX TM packing, a correlation developed by Carillo et al [51] was used.…”

HETP Evaluation of Structured and Randomic Packing Distillation Column

“…As the laboratory distillation column was operated continuously, different HETP values were found by the models for each section of the column. Olujic et al (2004) was the best method, showing good results, together with the correlation of Carrillo et al (2000), in which low deviations were obtained. The average deviation varied from 8 to 47%.…”

“…Simulation studies using the PRO II software had been performed in order to establish the best operating conditions in the distillation unit. Concerning the empirical models, a comparison between the Lockett (1998) and Carrillo et al (2000) Li et al (2010) used a special high-performance structured packing, PACK-13 C, with a surface area of 1135 m 2 /m 3 and the first stable isotope pilot-scale plant using structured packing was designed. The height and inner diameter of the distillation column were 20 m and 45 mm, respectively, and the height of the packing bed was 18 m. The raw materials utilized were only high purity CO gas and liquid notrogen.…”