Study On Preparation And Adsorption Desulfurization Performance Of Kaolin Nanotubes

Halloysite nanotubes,which belong to silicon aluminate nanotubes,have unique properties,including avirulent environmental protection,tubular structure,high specific surface area,abundant surface groups,and good biocompatibility.Therefore,halloysite nanotubes show good performance in composite materials,medicine,catalysis and adsorption.However,the reserves of halloysite nanotubes in our country are limited.In contrast,our country has widely distributed,abundant and cheap reserves of coal-series kaolin.Therefore,it has important practical value to convert coal-series kaolin into a new type of silicon aluminate nanotubes.Our research team found a new type of nanotubes which had a structure similar to halloysite nanotubes in the process of preparing halloysite nanotubes,and we named it �kaolin nanotubes�.Although kaolin nanotubes had good performance,the preparation of kaolin nanotubes had some deficiencies,such as long preparation period and low preparation efficiency.Therefore,aiming at these deficiencies,we introduce ultrasonic into the refinement of coal-series kaolin and the preparation of kaolin nanotubes,to improve the preparation efficiency of kaolin nanotubes by optimizing the original preparation conditions.Meanwhile,we introduce ultrasonic into the modification and adsorption desulfurization of kaolin nanotubes,to research the effects of different adsorption conditions and modification on the adsorption desulfurization performance of kaolin nanotubes.It is found that refined coal-series kaolin are produced by the combining of potassium acetate-intercalating,ultraphonic and acid-washing.The intercalated rate of DMSO and CH3 OH can be significantly improved when we use refined coal-series kaolin and sonicate the kaolin-DMSO with CH3 OH for 6 h,and we finally get kaolin nanotubes with better morphology and higher production.The adsorption desulfurization test shows that ultrasonic can improve the adsorption desulfurization performance of kaolin nanotubes,and the best ultrasonic time is 1 h.The modification with different organics can significantly improve the desulfurization rate of kaolin nanotubes which is 39.28% before the modification,and the desulfurization rate of kaolin nanotubes-0.6M DTAB which improves the most is 53.36%.