共查询到19条相似文献,搜索用时 125 毫秒
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“三苯系”VOCs催化燃烧催化剂的研究进展 总被引:3,自引:0,他引:3
介绍了"三苯系"挥发性有机化合物(VOCs)催化燃烧催化剂的国内外研究现状。对比了各种催化剂的催化性能及其优缺点,指出了这类催化剂的研究方向。 相似文献
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化工生产中VOCs排放是污染环境的一大因素,本文通过调研,列举了主要处理VOCs的技术,对各种技术的实际应用进行了考察,并对我国工厂内可行的处理技术以及未来发展前景进行了讨论。 相似文献
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石油化工企业工艺尾气及污水处理厂废气中均含有VOCs,一旦将其排放到空气中将会对环境造成污染,因而需要做好废气处理工作.因此,从催化燃烧技术处理工艺尾气和污水处理厂废气两个方面对VOCs废气的处理进行研究,探究出有效的VOCs废气处理方案,从工业废气中有效地去除VOCs,从而保障废气的排放符合相关标准,避免对环境造成污... 相似文献
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介绍了VOCs对人类环境和健康造成的危害。概述了工业应用中常用于治理有机废气的催化燃烧技术的基本原理、特点及相关催化剂的研究现状,指出此类催化剂应朝着提高低温活性、热稳定性、抗毒能力和价格低廉的方向发展。 相似文献
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社会经济的高速发展为人们的生产生活提供了诸多便利,但随之而来的环境污染问题也需引起社会各界的高度关注。在新时代背景下,以VOCs为代表的有机废气排放量不断增加,这不仅破坏了整个生态环境,同时也威胁着人们的身体健康。基于此,本文将在阐述当前VOCs有机废气具体分类的基础上,对VOCs有机废气处理技术进行探讨研究,并分析有机废气的处理困境,提出优化有机废气处理效果的有效措施,为相关单位提供参考。 相似文献
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为了建立统一定量测定粗苯中三苯含量的方法,采用带火焰电离检测器的气相色谱仪,在典型条件下进行粗苯不同样品的实验,研究了面积百分比法和采用美国有效碳数因子法、文献校正因子归一化法、实测校正因子法测定的粗苯中三苯含量结果的差异,分析了不同分析方法对实验结果的影响,确定了面积百分比法的合理性,并对20个样品的分析结果误差进行了验证。 相似文献
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本文介绍了近年国内外在治理可挥发有机化合物的研究进展,并对应用较多的治理技术及其新进展进行了较全面的综述。 相似文献
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气相色谱法测定粗苯中苯、甲苯和二甲苯含量 总被引:1,自引:0,他引:1
建立了毛细管气相色谱法测定粗苯中苯、甲苯、二甲苯含量的方法。采用HP-5毛细管柱分离,氢火焰离子化检测器检测,单点标准对照法定量。该方法分析速度快,测定重现性好,准确度和精密度高,三苯各个组分相对标准偏差均小于6%,回收率在96.0%~100.8%间。 相似文献
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The equilibrium and dynamics of low concentrations of benzene, toluene, and xylene in heptane adsorbed by zeolite NaY at 30, 40, and 50 °C were studied. The Langmuir equation was suggested to simulate the isotherms. Based on isotherms and material balances, multi‐component competitive adsorption isotherms can be successfully predicted by mono‐component adsorption isotherm parameters. A series of column adsorption experiments were conducted to study the adsorption dynamics. The mass transfer equations were solved by numerical analysis and used to describe the breakthrough curves, and the mass transfer coefficients in the adsorption column were obtained as well. 相似文献
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《分离科学与技术》2012,47(13):2679-2695
Abstract Asymmetric polyvinylidene fluoride (PVDF) hollow fiber membranes were prepared by a phase inversion method using dimethylacetamide (DMAc) and a mixture of water/LiCl as solvent and a nonsolvent additive, respectively. The prepared membranes were characterized by scanning electron microscopy (SEM) for observing its microstructures and by a gas permeation method for measuring its surface porosity, pore size, and pore size distribution. Wetting pressures of the dry hollow fiber membranes were also measured. Using the prepared PVDF hollow fiber membranes, a membrane module was fabricated for removal of benzene/toluene from water. Effects of various operating parameters such as downstream vacuum levels, feed temperatures, and feed flow rates on performances of the module were investigated experimentally. The benzene/toluene removal was achieved over 99% under an optimal operating condition. Mass transfer of benzene or toluene removal is controlled not only by the liquid phase resistance but also by the membrane and gas phase resistances. Benzene and toluene can be removed from water simultaneously with no adverse coupling effects. 相似文献