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首页> 外文期刊>International Journal of Heat and Mass Transfer >Adsorption of Difluoromethane (HFC-32) onto phenol resin based adsorbent: Theory and experiments
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Adsorption of Difluoromethane (HFC-32) onto phenol resin based adsorbent: Theory and experiments

机译：二氟甲烷（HFC-32）在酚醛树脂基吸附剂上的吸附：理论与实验

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摘要

Adsorption and desorption of difluoromethane (HFC-32) onto newly developed phenol resin based adsorbent (SAC-2) have been measured experimentally for the isotherm temperatures ranging from 30 °C to 130 °C and pressure up to 3 MPa. A magnetic suspension balance based adsorption measurement unit is used to measure adsorption uptake gravimetrically. The presented SAC-2/HFC-32 pair has adsorption uptake as high as 2.23 kgref/kgads(excess adsorption) and 2.34 kgref/kgads(absolute adsorption) at 30 °C and 1.67 MPa. To the best of our knowledge, it is the highest HFC-32 adsorption capacity onto any adsorbent available in the literature. The experimental data of adsorption/desorption isotherms show that there is no hysteresis for the studied pair. The data have been fitted with Tóth; Dubinin–Astakhov (D–A); and Guggenheim, Anderson, De-Boer (GAB) adsorption isotherm models. The parameters of adsorption isotherm models are optimized by nonlinear optimization technique. The D–A model fits the experimental data precisely as compared to other models. In addition, numerical values of isosteric heat of adsorption have also been extracted by means of Clausius–Clapeyron equation using adsorption isotherm models.
机译：实验测量了等温温度范围为30 isC至130 C，压力高达3 MPa的情况下，二氟甲烷（HFC-32）在新开发的基于酚醛树脂的吸附剂（SAC-2）上的吸附和解吸。基于磁悬浮平衡的吸附测量单元用于重量分析法测量吸附量。提出的SAC-2 / HFC-32对在30 C和1.67 MPa下的吸收率分别高达2.23 kgref / kgads（过量吸附）和2.34 kgref / kgads（绝对吸附）。据我们所知，这是文献中所有吸附剂上最高的HFC-32吸附量。吸附/解吸等温线的实验数据表明，所研究的线对没有滞后现象。数据已与Tóth拟合； Dubinin–Astakhov（DA）；以及Guggenheim，Anderson，De-Boer（GAB）吸附等温线模型。吸附等温线模型的参数采用非线性优化技术进行优化。与其他模型相比，D–A模型可以精确拟合实验数据。另外，还利用克劳修斯-克拉珀龙方程，利用吸附等温线模型，提取了等温吸附热的数值。

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