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author:

Ye, C.-S. (Ye, C.-S..) [1] | Wang, H.-X. (Wang, H.-X..) [2] | Huang, G.-Q. (Huang, G.-Q..) [3] | Qiu, T. (Qiu, T..) [4]

Indexed by:

Scopus

Abstract:

To reduce the high energy consumption during the traditional ordinary distillation process for recycling N,N-dimethyl formamide (DMF), this paper utilized the NKA-II macroporous adsorptive resin in combination with a distillation process to recycle DMF in wastewater. First, the adsorption equilibrium data were measured in the intermittent agitation tank, which showed that the DMF adsorption equilibrium on the NKA-II resin complies with the Henry equation. The dynamic experimental studies indicated that the adsorption temperature has little effect on the adsorption process; the flow rate and the bed height affect the breakthrough time but have little effect on the mass transfer zone. With the combination of the fixed-bed adsorption model and the breakthrough curve, the surface diffusion coefficient of the DMF on the resin in the fixed bed was approximately 3.50×10-10 to 1.06×10-9m2s-1. The simulated values were in good agreement with the breakthrough curves determined by experiments. Furthermore, ethanol was selected as a better desorption agent. The appropriate desorption conditions were determined to be a flow rate of 8.00×10-5ms-1 to 1.58×10-4ms-1 and a temperature of 308-318K. Under these conditions, the desorption rates were all greater than 99%. Finally, wastewater that contained 5% DMF was used as an example to analyze the energy consumption. The results indicated that the adsorption-distillation process can reduce the energy consumption by 79%. The adsorption-distillation process has a good applicable value for the recovery of DMF in wastewater, especially for wastewater with a low concentration of DMF. © 2013 The Institution of Chemical Engineers.

Keyword:

Adsorption; Desorption; Distillation; DMF; Fixed bed

Community:

  • [ 1 ] [Ye, C.-S.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China
  • [ 2 ] [Wang, H.-X.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China
  • [ 3 ] [Huang, G.-Q.]College of Chemical Engineering, Tianjin University, Tianjin, Hebei 300072, China
  • [ 4 ] [Qiu, T.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China

Reprint 's Address:

  • [Ye, C.-S.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China

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Source :

Chemical Engineering Research and Design

ISSN: 0263-8762

Year: 2013

Issue: 12

Volume: 91

Page: 2713-2720

2 . 2 8 1

JCR@2013

3 . 7 0 0

JCR@2023

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 26

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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