微波加热及真空集成再生活性炭

吸附法油气回收技术中，吸附剂的再生是一个难点和研究重点。微波加热再生作为一种新技术，受到人们的广泛关注。运用正交实验，研究了微波功率、辐照时间、活性炭量和真空度对吸附了汽油油气的富活性炭的再生率和损耗率的影响，发现影响顺序为微波功率〉辐照时间〉活性炭量〉真空度。综合考虑各方面因素，得出实验的最优方案为微波功率300W、辐照时间240s、活性炭量4g、真空度O．06MPa。还研究了活性炭多次吸附一再生后平衡吸附率和表面结构的变化。结果表明，微波和真空法对活性炭的表面结构影响不大，有利于活性炭的多次循环利用。综合比较真空再生法、真空和加热再生法、微波和真空再生法的再生效果，结果表明，微波和真空再生法稳定性较好。

Regeneration of activated carbon using integration of microwave heating and vacuum decompressing

The regeneration of adsorbent is always the key issue and hot topic in the research and develop- ment of the oil vapor recovery technology using adsorption separation method. As a new technology, the micro- wave radiation has been paid more and more attention. Based on the orthogonal experiment design, the influence of four factors on the regeneration rate and the loss rate of different activated carbons having adsorbed gasoline va- por were investigated. The four factors were the power and the irradiation time of microwave, the amount of acti- vated carbon, and the vacuum degree. The results showed that the effect order of the four factors on the two rates was microwave power 〉 irradiation time 〉 activated carbon amount 〉 vacuum degree. When the four factors were 300 W, 240 s, 4 g, 0.06 MPa, respectively, the regeneration method in the experiment was optimal. Fur- thermore, the changes of adsorption rate and surface structure of the activated carbon after several adsorption-re- generation circulations were also discussed. The results showed that the regeneration method of microwave-vacu- um had little effect on the surface structure of the activated carbon, and this was in favor of the recycling use of the activated carbon. Finally, the different regeneration methods of vacuum, vacuum-heating and microwave-vac- uum were comprehensively compared, and results showed that the regeneration method of microwave-vacuum was characterized by better stability.