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author:

Ye, Chang-shen (Ye, Chang-shen.) [1] (Scholars:叶长燊) | Wang, Hong-xing (Wang, Hong-xing.) [2] | Huang, Guo-qiang (Huang, Guo-qiang.) [3] | Qiu, Ting (Qiu, Ting.) [4] (Scholars:邱挺)

Indexed by:

EI Scopus SCIE

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 x 10(-10) to 1.06 x 10(-9) m(2) s(-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 x 10(-5) m s(-1) to 1.58 x 10(-4) m s(-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. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Keyword:

Adsorption Desorption Distillation DMF Fixed bed

Community:

  • [ 1 ] [Ye, Chang-shen]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Wang, Hong-xing]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Qiu, Ting]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Huang, Guo-qiang]Tianjin Univ, Coll Chem Engn, Tianjin 300072, Hebei, Peoples R China

Reprint 's Address:

  • 叶长燊

    [Ye, Chang-shen]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China

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Source :

CHEMICAL ENGINEERING RESEARCH & 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

ESI Discipline: CHEMISTRY;

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 26

SCOPUS Cited Count: 26

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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