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国家自然科学基金(29936100)

作品数:21 被引量:225H指数:11
相关作者:李忠奚红霞谢兰英李祥斌徐科峰更多>>
相关机构:华南理工大学天津大学常德卷烟厂更多>>
发文基金:国家自然科学基金广东省自然科学基金国家重点基础研究发展计划更多>>
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21 条 记 录,以下是 1-10
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热电冷凝VOCs被引量:11
2005年
本文研究了用热电制冷器冷凝三种VOCs的实验,并考察了时间、电功和热端温度对热电冷凝VOCs气体过程的影响。研究结果表明热电冷凝VOCs具有非常快的冷凝速率,只需1.5分钟就可以把115℃高温的VOCs气体冷凝至-10℃的气体,出口气体分压显著下降;实验结果还表明随着热电制冷器热端温度的升高,出口气体温度也相应的增加,体系所耗电功也增大,制冷系数降低。
谢兰英罗灵爱李忠
关键词:VOCS热电制冷器制冷系数挥发性有机污染物大气污染
Estimation of the Isotherms of Phenol on Activated Carbons and Polymeric Adsorbents under Supercritical Condition被引量:2
2003年
A method named as 'volume-expanding and pressure-reducing adsorption' is proposed. It can be used to measure the isotherms under supercritical condition. The adsorption isotherms of phenol on activated carbons and polymeric adsorbents are estimated and compared respectively for the systems of 'phenol-activated carbon-supercritical fluid CO2' and 'phenol-polymeric adsorbent-supercritical fluid CO2'. The results show that the amount of phenol adsorbed on the activated carbons and the polymeric adsorbents under the supercritical condition is much less than that under the general condition, which can be utilized to develop a technology regenerating the activated carbon with supercritical fluid. Moreover, the effects of ethyl alcohol, used as the third component, on the isotherms of phenol on the activated carbons and polymeric adsorbents under the supercritical condition are also investigated.
奚红霞谢兰英李祥斌李忠
超声场中苯酚在NKAⅡ树脂上脱附扩散系数估算被引量:14
2002年
Phase equilibrium and kinetic experiments of phenol on NKAⅡ resin under ultrasonic field and non-ultrasonic field were separately conducted at normal temperature.The model for estimating diffusion coefficient of phenol on the NKAⅡ resin was established.Results showed that application of ultrasound can change the phase equilibrium state of NKAⅡ/phenol/water system which has reached equilibrium under normal condition.The phase equilibrium state of the system shift towards decrease in the amount adsorbed of phenol on NKAⅡ resin.In addition, acoustic cavitation could make diffusion coefficient of phenol in NKAⅡ resin in ultrasonic field increase by one order of magnitude in comparison with the diffusion coefficient determined in non-ultrasonic field.The diffusion coefficient increased with the increase in acoustic power.However,it was found that if the acoustic intensity was larger than 0.057?W·cm -2 , slight pulverization of the NKAⅡ resin occurred, which should be avoided in application.
李祥斌李忠奚红霞谢兰英王红娟
关键词:脱附超声场有机污染物
A Mathematical Method for Determination of Absolute Adsorption from Experimental Isotherms of Supercritical Gases被引量:12
2001年
A mathematical method was proposed for the determination of absolute adsorption from experimental isotherms. The method is based on the numerical equality of the absolute and the excess adsorption when either the gas phase density or the amount adsorbed is not quite considerable. The initial part of the experimentalisotherms, which represents the absolute adsorption, became linear with some mathematical manipulations. The linear isotherms were reliably formulated. As consequence, either the volume or the density of the supercritical adsorbate could be determined by a non-empirical way. This method was illustrated by the adsorption data of supercritical hydrogen and methane on a superactivated carbon in large ranges of temperature and pressure.
周理周亚平
Estimation of Pore Size Distribution by CO_2 Adsorption and Its Application in Physical Activation of Precursors被引量:10
2000年
The CO2 adsorption data may show more than one section in the Dubinin-Radushkevich-Kaganer(DRK) plot if samples had been over-activated. Each section in the plot represents a range of pore size. The whole DRK plot provided information on the pore size distribution(PSD) of a sample, which may be used to monitor the effect of activation conditions in activation processes.
周理
关键词:ACTIVATION
微波强化非均相类Fenton反应氧化降解苯酚被引量:13
2006年
研究了在微波场条件下非均相类Fenton试剂反应降解含酚废水,分别进行了微波场条件下和常规条件下类Fenton试剂反应降解苯酚实验并测定了反应动力学曲线,讨论了温度、微波场功率对苯酚去除率以及TOC去除率的影响,估算了反应活化能。实验结果表明:使用微波辐射可提高非均相类Fenton反应降解含酚废水的反应速率、苯酚去除率和TOC去除率。发现在微波和常规条件下,反应可近似为三级动力学反应。反应活化能估算结果表明,对类Fenton试剂降解苯酚的反应体系施加微波,可降低反应活化能和提高反应速率,微波辐射的功率越大,苯酚转化速率和TOC降解速率就越快。与常规条件下类Fenton试剂降解苯酚的反应相比,施加足够强的微波场,可较明显降低反应活化能和提高反应速率和去除率。当微波辐射功率分别为200 W和600 W时,苯酚降解的反应活化能分别为17.175和15.042 kJ/mol,比常规条件的反应活化能降低了11.48%和22.48%。
徐科峰李忠夏启斌魏帅黎华亮
关键词:微波苯酚TOC降解
程序升温脱附测定难挥发性有机物吸附相平衡被引量:7
2011年
提出一种采用少量程序升温脱附实验就能计算挥发性有机物在不同温度下吸附等温线的方法。该方法以拟平衡吸附动力学为基础,建立难挥发性有机物从吸附剂表面程序升温脱附的模型,采用数值方法对该模型进行求解。采用该模型对程序升温脱附实验测定的图谱进行模拟,获得难挥发性有机物在吸附剂上的吸附相平衡参数,从而确定吸附等温线。运用所提出的方法,对二苯并呋喃在Norit RB1和Chemviron BPL活性炭上的吸附等温线方程进行了估算。估算结果与静态吸附实验测定结果比较吻合,误差不超过10%。
李湘李忠罗灵爱
关键词:程序升温脱附二苯并呋喃
DESORPTION OF VOCs FROM POLYMERIC ADSORBENTS UNDER MICROWAVE FIELD被引量:1
2001年
Desorption of volatile organic compounds (VOCs) from polymeric adsorbents by microwave was investigated experimentally. Two kinds of organic compounds, benzene and toluene, were separately used as adsorbates in this work. Results showed that the application of microwave to regenerate the polymeric adsorbents not only can get higher regeneration efficiency in comparison with the use of heat regeneration, but also make the temperatures of the fixed beds much lower than that when using the heat regeneration. The weaker the polarity of a polymeric adsorbent, the easier its regeneration was.
LI XiangLI ZhongWANG HuanXI Hongxia
关键词:MICROWAVEDESORPTION
多组分气体吸附平衡理论研究进展被引量:16
2002年
关于多组分气体吸附平衡理论的研究之所以重要 ,一是因为其在分离技术中的应用前景 ,二是因为其尚不成熟。本文对临界温度以下多组分气体吸附平衡理论研究的进展、各种数学模型的特点及适用范围作了评述 。
李明周理吴琴周亚平
关键词:多组分气体
微波对Fenton试剂降解苯酚反应活化能的影响被引量:14
2005年
研究了在微波场条件下Fenton试剂降解含酚废水的反应.分别在常规和微波场条件下进行反应,测定了反应动力学曲线,发现在常规条件下和微波条件下,反应动力学曲线可分成两个阶段,第一阶段为二级反应,第二阶段为一级反应;讨论了温度、微波功率对总有机碳(TOC)去除率的影响,估算了反应活化能.实验结果表明:微波辐射可提高Fenton试剂降解苯酚的反应速率和TOC去除率,降低反应活化能;当微波功率分别为100、200和600W时,在反应的第一阶段,苯酚降解反应活化能分别为9.833、9.139和8.579 kJ/mol,在第二阶段分别为28.245、27.560和26.710 kJ/mol,低于常规条件下相应阶段的苯酚降解反应的活化能(第一阶段为10.782 kJ/mol,第二阶段为30.294 kJ/mol),且反应活化能随着微波强度的增大而减小.
徐科峰李忠魏帅夏启斌
关键词:微波FENTON反应苯酚反应活化能
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