Comparison of hydroxyl radicals generation during granular activated carbon regeneration in DBD reactor driven by bipolar pulse power and alternating current power

作者：Yuan, Deling; Tang, Shoufeng^*; Qi, Jinbang; Li, Na; Gu, Jianmin; Huang, Haiming^*

来源：Vacuum, 2017, 143: 87-94.

DOI：10.1016/j.vacuum.2017.06.003

• Hydroxyl radicals
• Dielectric barrier discharge
• Activated carbon regeneration
• Bipolar pulse power
• Alternating current power

Hydroxyl radicals (center dot OH) is a kind of critical active species produced in the process of discharge plasma. We employed an innovative method to explore the center dot OH generation features during granular activated carbon (GAC) regeneration in a DBD reactor, which was driven by a bipolar pulse power and an alternating current (AC) power, respectively. This measure was used the salicylic acid (SA) as a center dot OH scavenger, which was adsorbed on GAC. And then the amount of center dot OH was determined by the SA extracts from GAC using HPLC. The influence of the reactor supplied power on center dot OH generation was assessed respectively powered by bipolar pulse and AC power. Besides, the effects of applied voltage, air flow rate, and GAC water content on center dot OH formation were also evaluated under the two powers. Results showed that the greater discharge strength and air support were in favor of higher center dot OH generation, and an optimal value of 20% for GAC water content was also observed. Moreover, the center dot OH formation and its energy efficiency supplied by bipolar pulse power were both superior than AC power. Correspondingly, the phenol degradation on GAC and GAC regeneration motivated by bipolar pulse power were also enhanced than AC power.

• 出版日期2017-9
• 单位燕山大学