Competitive and synergistic adsorption of binary volatile organic compound mixtures on activated carbon

• 来源期刊: 中国物理B（英文版）
• 关键词: competitive adsorption synergistic adsorption oil–gas reservoirs terahertz time domain spectroscopy (THz-TDS)
• 年，卷（期）: 2019,（2）
• 页码范围: 102-106
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/2/020204

摘要

The adsorption of four substances and their binary mixture is investigated via the terahertz time domain spectroscopy (THz-TDS). The selected unary compound (ethanol, acetone, ethyl acetate, and n-propyl acetate) and binary mixture (solution 1 is composed of ethanol and acetone, and solution 2 is composed of ethyl acetate and n-propyl acetate) exhibit different adsorption behaviors with varied polarities. In comparison with single component, solution 1 shows shorter adsorption equilibrium time, faster adsorption rate, and stronger adsorption capacity, which conform to a synergistic adsorption mechanism, while the competitive behavior is attributed to the slower adsorption in solution 2. In addition, the pseudo-second-order equation with terahertz parameter is used to assess the rate of binary component organics. The present results indicate a further understanding of multicomponent adsorption mechanisms.