丁二酸发酵液色素的活性炭吸附过程.pdf

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化工.进展
2012年第31卷第12期
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丁二酸发酵液色素的活性炭吸附过程
胡俊铎2,洪怡2,吴吴2,任晓乾,姜岷2,雷科2
(南京工业大学化学化工学院,材料化学工程国家重点实验室:2南京工业大学生物与制药工程学院
江苏南京211816
摘要:以丁二酸发酵液为研究体系,采用静态吸附法研究了颗粒活性炭对丁二酸发酵液色素的吸附过程;并
考察了搅拌转速对活性炭吸附色素过桯的影响。结果表明活性炭对色素的吸附是以物理吸附为主的吸热过程,
其吸附热为12.54k-mol,适宜的脱色温度有利于提高活性炭的利用效率,热水解吸可实现活性炭的再生;活
性炭对色素的初始吸附速度随搅拌转遠増加而増加;在活性炭快速吸附阶段,液膜扩散为主要控速步骤,增加
搅拌转速可减少颗粒液膜层的厚度,有效扩散系数随之增加。通过考察进料对活性炭层析柱的脱色效果的影响
结果表明合适的进料流速能提过活性炭的利用率
关键词:活性炭;丁二酸发酵液;脱色;热力学
中图分类号:O647.3
文献标志码:A
文章编号:1000-6613(2012)12-2643-0
Adsorption process of the pigment from succinic acid fermentation broth
on activated carbon
Hujundu, HONG Yi, WU Hao, REN Xiaogan, JLANG Min, LEI Ke
State Key Laboratory of Materials-oriented Chemical Engineering, College of Chemistry and Chemical Engineering
Nanjing University of Technology; "College of Biotechnology and Pharmaceutical Engineering, Nanjing University of
Technology, Nanjing 211816, Jiangsu, China)
Abstract By taking the succinic acid fermentation broth as the research object, the adsorption process
of the pigment from succinic acid fermentation broth on activated carbon was studied by static
absorption method, and the effects of pigments concentration and rotation speed on adsorption were
also discussed. The results showed that the adsorption was endothermic process, and physical
adsorption was the dominant, the isosteric heat of adsorption is 12. 54 KJ/mol, suitable temperature is
helpful to increase the adsorption efficiency. The activated carbon can be reused by using hot water
The initial absorbing rate of the activated carbon increased with the rotation speed Film diffusion was
the major rate-controlling step in the fast adsorption phases, the thickness of liquid film decreased with
rotation speed, and the effective diffusion coefficient increased, which suggested the adsorption
properties of activated carbon column could be improved by optimizing flow rate. And the result
showed that the suitable flow ratio was beneficial to improve the utilization ratio of activated carbon
Key words: activated carbon; succinic acid fermentation broth; decoloration; thermodynamics
丁二酸作为一种二元羧酸可制备1,4-丁二醇、
收稿日期:2012-06-15;修改稿目期:2012-07-10
四氢呋喃、y-丁内酯、M-甲基吡咯烷等基础化工基金项目:国家863计划(201ADA03)、江苏省高校自然科学基础
产品,是新型可完全生物降解塑料
研究(08KJB18000)、南京工业大学青年教师学术基金及江苏省“六
聚丁二酸丁二醇酯(PBS)的主要原料市场
大人才高峰”(06-A-047)项目。
第一作者:胡俊铎(1987-),男,硕士研究生。联系人:吴是,讲师。
需求量大。目前国内外的研究热点是采用微生物发 E-mail wuhao(@njut.edu. c