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引用次数: 0
摘要
针对弗鲁姆金等温线，建立了一个从旋转盘表面解吸到表面活性物质溶液中的模型。研究了在 1%误差范围内接近第一平衡所需的时间。对于解吸来说，这意味着获得最高的表面覆盖率，而对于吸附来说，则是获得与溶液体积平衡的最低覆盖率。如果平衡等温线呈 S 型，则近平衡等温线的特点是，体积浓度的微小增量会引起覆盖率的巨大变化。这些变化需要很长的近平衡时间，因为它们是由溶解的表面活性剂的小流量驱动的。这些时间是滞后的第二部分。
Simulation of the adsorption – desorption hysteresis for Frumkin isotherm
A model of desorption from the surface of rotating disk into the solution of surface active substance is developed for Frumkin isotherm. The time needed to approach the first equilibrium within 1% of error is investigated. For desorption this means to acquire the highest surface coverage, and for adsorption the lowest coverage that is in the equilibrium with the bulk of solution. If the equilibrium isotherm is S shaped, the near equilibrium isotherms are characterised by big changes of coverage that are caused by small increments of bulk concentrations. These changes require very long near equilibrating times because they are driven by small fluxes of dissolved surfactant. These times are the second component of the hysteresis.
期刊介绍：
The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news.
Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design.
Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.
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