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首页> 外文期刊>The Journal of the Textile Institute >Kinetic and thermodynamic studies on gas adsorption behaviour of natural fibres
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Kinetic and thermodynamic studies on gas adsorption behaviour of natural fibres

机译：天然纤维气体吸附行为的动力学和热力学研究

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摘要

Gas adsorption properties of key natural fibres were investigated through monitoring the adsorption process of ammonia onto wool and cotton by time-resolved infrared spectroscopy. It was found that Langmuir isotherm model best described ammonia adsorption onto wool and cotton, indicating monolayer adsorption. The adsorption capacity of wool and cotton for ammonia was found to be 7.948 x 10(-5 )mol g(-1)and 3.066 x 10(-5 )mol g(-1), respectively. Adsorption diffusion was found to be the rate limiting step for wool in the initial adsorption stage, following the Dumwald-Wagner model. For cotton, adsorption reaction process was found to be the rate limiting step for the whole adsorption, following the pseudo-second-order model. The activation energy values of ammonia adsorption were calculated to be 26.50 kJ mol(-1)for wool and 30.43 kJ mol(-1)for cotton, which demonstrates that ammonia adsorption onto fibres requires energy. The study could promote developing textile products for odour control.
机译：通过将氨的吸附过程监测到羊毛和棉通过时间分辨的红外光谱来研究关键天然纤维的气体吸附性能。发现Langmuir等温线模型最能描述氨吸附到羊毛和棉花上，表明单层吸附。发现羊毛和棉的吸附能力为7.948×10（-5）mol g（-1）和3.066×10（-5）mol g（-1）。在Dumwald-Wagner模型之后，发现吸附扩散是初始吸附阶段羊毛的速率限制步骤。对于棉，伪二阶模型之后，发现棉花的吸附反应过程是整个吸附的速率限制步骤。氨吸附的活化能量值计算为羊毛和30.43kJMol（-1）的26.50kJMol（-1）棉，这表明氨吸附到纤维上需要能量。该研究可以促进开发纺织品进行气味控制。

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