Nanoscience Institute of Aragon and Chemical and Environmental Engineering Department , University of Zaragoza , 50018 Zaragoza , Spain.
Networking Research Centre CIBER-BBN , 28029 Madrid , Spain.
Environ Sci Technol. 2018 May 15;52(10):5892-5901. doi: 10.1021/acs.est.8b00191. Epub 2018 Apr 25.
A microwave-heated adsorbent-reactor system has been used for the continuous cleaning of air streams containing n-hexane at low concentrations. Both, a single catalytic bed (PtY zeolite) and a double (adsorptive DAY zeolite + catalytic PtY zeolite) fixed-bed reactor configurations were studied under dry and humid conditions. The zeolites were selectively heated by short periodic microwave pulses that caused the desorption of n-hexane and its subsequent catalytic combustion. The double bed configuration was attractive because it allowed nearly the same performance with only half of the catalyst load. The operation was especially efficient under realistic humid gas conditions that favored more intense microwave absorption, producing a faster heating of the adsorptive and catalytic beds. Under these conditions, continuous gas cleaning could be achieved with short (3 min, 30 W) microwave heating pulses every 5 min.
一种微波加热吸附剂-反应器系统已被用于连续清洁含有低浓度正己烷的空气流。在干燥和潮湿条件下，分别研究了单催化床（PtY 沸石）和双固定床（吸附性 DAY 沸石+催化 PtY 沸石）两种反应器构型。沸石通过短周期微波脉冲选择性加热，导致正己烷解吸及其随后的催化燃烧。双床构型很有吸引力，因为它只需一半的催化剂负载即可实现几乎相同的性能。在有利于更强烈微波吸收的实际潮湿气体条件下，操作特别有效，从而使吸附床和催化床更快地加热。在这些条件下，通过每 5 分钟进行 3 分钟（30 W）的短微波加热脉冲，可以实现连续的气体清洁。
