利用h2o2和超声波提高废催化剂沸石的吸附量

D. Vaičiukynienė, A. Kantautas, L. Jakevicius, V. Godvišaitė, J. Mockienė, V. Vaičiukynas
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摘要

合成的沸石Y (Na 56 [(AlO 2) 56 (sio2) 136]×250H 2o)在催化裂化过程中作为石油炼制的吸附剂,经过一定时间后污染成为废物。立陶宛的这种废物每年可达200吨。欧盟的环保要求越来越严格,有必要创造出退役的吸收剂加工方法,以便在制造各种产品和材料中进一步合理使用。采用200w功率的20 kHz超声处理,将垃圾在15% h2o2水溶液中进行整合活化。超声处理后的悬浮液中形成气蒸汽气泡。内部温度上升到几千度,压力上升到几千个大气压。气泡破裂后会出现冲击波。空化过程在流体中的过程有助于粉碎沸石颗粒,有利于杂质的分离,加速其氧化反应。超声处理后沸石的吸附性能提高,尤其是在过氧化氢溶液中进行超声处理。在这种情况下,吸附容量增加了约2.18倍。因此,所研究的沸石废物可用于环境保护计划中的重金属吸附。DOI: http://dx.doi.org/10.5755/j01.ct.66.1.13384
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SORPTION CAPACITY INCREASING OF SPENT CATALYST ZEOLITE BY USING H2O2 AND ULTRASOUND
The synthetic zeolite Y (Na 56 [(AlO 2 ) 56 (SiO 2 ) 136 ]×250H 2 O) is used as an adsorbent for petroleum refining during catalytic cracking, and after a certain time it contaminates and becomes a waste. This waste in Lithuania can make up to 200 tons per year. The EU environmental requirements are becoming stricter, and it is necessary to create the retired absorbent processing methods for the further rational use in manufacturing various products and materials. The waste in this research was activated by integrating in 15 % H 2 O 2 aqueous solution, using 20 kHz ultrasonic processing of 200 W powers. Gas-vapor bubbles are formed in the suspension after the treatment with ultrasound. The temperature inside increases to several thousand degrees and the pressure to thousands of atmospheres. Shock waves appear after the collapse of bubbles. The process in the fluid during cavitation helps crushing zeolite particles, facilitates the separation of impurities and accelerates their oxidation reaction. The zeolite sorption capability increases after treatment with ultrasound, especially using ultrasonic treatment in a hydrogen peroxide solution. In this case, the sorption capacity increases about 2.18 times. Thus, the investigated zeolite waste can be used in environmental protection programs for heavy metal sorption. DOI: http://dx.doi.org/10.5755/j01.ct.66.1.13384
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