废MTP催化剂的酸脱铝改性及其有机物吸附性能  

Dealumination of spent MTP catalyst with different acids and their organic adsorption performance

作　　者：赵娜娜 苏慧 Zhao Nana;Su Hui(Institute of Coal Chemical Industry Technology,CHN Energy Ningxia Coal Industry Group Co.,Ltd.,Yinchuan 750411,Liaoning,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,宁夏银川750411

出　　处：《工业催化》2023年第8期63-69,共7页Industrial Catalysis

基　　金：宁夏回族自治区重点研发计划一般科技项目(2018BDE63003)。

摘　　要：分别采用盐酸、草酸对工业装置排放的废MTP催化剂进行脱铝改性,利用XRD、XRF、N_(2)吸附-脱附、^(27)Al NMR、^(29)Si NMR等方法对其进行表征,并考察不同种类的酸脱铝对废MTP催化剂结构及有机物吸附性能的影响。结果表明,盐酸主要脱除废MTP催化剂骨架铝,草酸不仅脱除废MTP催化剂骨架铝还溶解了部分非骨架铝。废MTP催化剂经酸脱铝后,孔道增大,暴露出更多的比表面积,有效改善了其有机物吸附性能。The dealumination of spent MTP catalyst emitted by industrial devices was carried out with aqueous solutions of hydrochloric acid and oxalic acid,respectively.The spent MTP catalyst before and after dealumination was characterized by XRD,XRF,N_(2)adsorption-desorption,^(27)Al MAS NMR,and^(29)Si MAS NMR.The effects of dealumination using different acids on the structure and adsorption properties of were investigated.The result showed that the framework Al could be removed by hydrochloric acid and oxalic acid,and extra-framework Al could also be removed by oxalic acid.After dealumination,the pores were enlarged and more specific surface area was exposed,which effectively improves the adsorption performance of organic compound compared to that catalyzed by parent sample.

关 键 词：三废处理与综合利用 废MTP催化剂 酸处理 有机物吸附 

分 类 号：TQ426.99[化学工程] X705[环境科学与工程—环境工程]