Modelling of breakthrough curve in water adsorption on silica gel and zeolite 4A

Authors

  • Andrés Felipe Rivera-Guerrero Universidad Nacional de Colombia https://orcid.org/0000-0002-6043-2476
  • Gerardo Rodríguez-Niño Universidad Nacional de Colombia
  • Pedro Janer Bejarano-Jiménez Universidad Nacional de Colombia

Keywords:

Water adsorption, simulation, adsorption isotherm, breakthrough curve, adsorbents, fixed bed

Abstract


This  paper  presents  the  development  of  a  computational  model  to  simulate  the adsorption of water in a fixed bed, comparing the performance of zeolite 4A and silica gel type ‘A’. A variation of the Langmuir isotherm for zeolite 4A and Tóth isotherm for the silica gel were used; Linear Driving Force (LDF) model was used for adsorption rate with an overall coefficient temperature dependent.  The  model  is  composed  of  five  partial  differential  equations associated  with  mole  fraction  of  water,  temperature,  pressure,  superficial velocity  and  water  loading.  Method  of  lines  (MOL)  was  used  with  the  function ODE15S of Matlab® to solve the system. As response variables the characteristic time interval of the breakthrough curve, asymmetry, maximum temperature  and  pressure  drop,  through  a  two-level  factorial  scheme  were  evaluated.  Adsorbent  was  the  most  influential  variable  on  the  response variables.  Zeolite  has  the  highest  rate  of  adsorption  due  to  the  shape  of  the  adsorption  isotherm,  but  has  a  lower  water  retention  loading  and  increased  resistance to mass transfer.

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Author Biographies

Andrés Felipe Rivera-Guerrero, Universidad Nacional de Colombia

Facultad de Ingeniería - Departamento de Ingeniería Química y Ambiental – Grupo de Investigación en Procesos Químicos y Bioquímicos 

Gerardo Rodríguez-Niño, Universidad Nacional de Colombia

Facultad de Ingeniería - Departamento de Ingeniería Química y Ambiental – Grupo de Investigación en Procesos Químicos y Bioquímicos 

Profesor Asociado

Pedro Janer Bejarano-Jiménez, Universidad Nacional de Colombia

Facultad de Ingeniería - Departamento de Ingeniería Química y Ambiental – Grupo de Investigación en Procesos Químicos y Bioquímicos

Profesor Asistente

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Published

2014-02-12

How to Cite

Rivera-Guerrero, A. F., Rodríguez-Niño, G., & Bejarano-Jiménez, P. J. (2014). Modelling of breakthrough curve in water adsorption on silica gel and zeolite 4A. Revista Facultad De Ingeniería Universidad De Antioquia, 71(71), 179–190. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/15316