Adsorption of volatile organic compounds onto biomass-derived activated carbons: Experimental measurement and comparison
Adsorption of volatile organic compounds onto biomass-derived activated carbons: Experimental measurement and comparison
复制标题
生物质活性炭对挥发性有机化合物的吸附：实验测量和比较
DOI：
10.1115/1.4055182
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
A. Pal
中科院分区：
文献类型：
--
作者：
T. H. Rupam;B. B. Saha;M. L. Palash;A. Pal
挥发性有机化合物（VOC）是一类从某些固体或液体中释放的有害气体物质。它们被认为对人类健康具有严重的短期或长期不利影响。如今，由于挥发性有机化合物的不利影响，一种节能且经济的挥发性有机化合物去除系统是绝对必要的。在这方面，基于太阳能或废热驱动的吸附技术可以提供节能系统;然而，大多数时候，它们的利用受到吸附材料高成本的限制。目前，只有一种名为Maxsorb III的商用高级活性炭具有高捕获能力。这种吸附剂的购买成本非常高，并且它来自不可再生的来源。因此，本研究的目的是寻求低价格的生物质衍生的活性炭的能源效率和成本效益的挥发性有机物去除系统。以红树林和废弃棕榈树干为原料制备了两种生物质活性炭，采用反相气相色谱法测定了它们对乙醇、二氯甲烷、丙酮和乙酸乙酯4种挥发性有机物的吸附性能。理论上计算了所有吸附剂/吸附质对的零吸收吸附焓和吸附比熵。之后，将这些数据与Maxsorb III获得的数据进行比较，以评估生物质衍生活性炭的性能。结果表明，对于所有的挥发性有机化合物，具有成本效益的红树林基活性炭可以是一个很好的替代高价Maxsorb III时，作为吸附剂材料去除挥发性有机化合物。
Volatile organic compounds (VOCs) are a class of hazardous gaseous materials emitted from certain solids or liquids. They are thought to possess serious short-or long-term adverse effects on human health. Nowadays, an energy-efficient and cost-effective volatile organic compound removal system is of absolute necessity due to its adverse effects. In this regard, solar or waste heat-driven adsorption-based technologies can provide an energy-efficient system; however, most of the time, their utilization is limited by the high cost of the adsorbent materials. Right now, only one commercial high-grade activated carbon named Maxsorb III is known to have high capturing capacities. The purchasing cost of this adsorbent is very high, and it is derived from a non-renewable source. Therefore, this study is intended for the quest for low-priced biomass-derived activated carbons for an energy-efficient and cost-effective VOCs removal system. Two biomass-derived activated carbons synthesized from mangrove wood and waste palm trunk precursors are chosen, and four types of VOCs (ethanol, dichloromethane, acetone, and ethyl acetate) adsorption onto them are measured experimentally using the inverse gas chromatography technique. The zero uptake adsorption enthalpy and specific entropy of the adsorption are theoretically computed for all the adsorbent/adsorbate pairs. After that, these data are compared with the obtained data for Maxsorb III to assess the performance of the biomass-derived activated carbons. Results show that, for all the VOCs, the cost-effective mangrove-based activated carbon can be an excellent alternative to the high-priced Maxsorb III when employed as an adsorbent material for VOCs removal.