MOF-808改性材料吸附脱除塑料油品中的有机氯化物
Adsorption and removal of organochloride from plastic oil by MOF-808-modified material
姬娅茹 1李瑞丽 1翟永怡 1张世博1
作者信息
- 1. 中国石油大学(北京)重质油全国重点实验室,北京 102249
- 折叠
摘要
根据MOF-808材料的优良吸附性能,研究其对塑料裂解油中的有机氯化物的脱除效果.首先制备了MOF-808材料,然后采用水热合成法掺杂Fe制备了不同掺杂比的Zr∶Fe(x∶y)@MOF-808材料进行结构表征;选取塑料裂解油中典型的4种有机氯化物配置成模型油,以模型油中有机氯化物的脱除率作为依据,确定最佳x∶y=1∶0.67;探究了其吸附脱氯实验的最佳反应条件和再生重复使用性能,并考察了其吸附机理.结果表明,制备的Zr∶Fe(1∶0.67)@MOF-808吸附材料的结构及稳定性良好;在吸附温度50℃、吸附时间2 h、剂油比为1∶40时,对模型油中氯化物的脱除率高达97.66%;吸附剂重复使用6次后脱氯率仍在85%以上;该吸附过程符合拟二级动力学模型,是自发进行的化学吸附过程.
Abstract
The removal effectiveness of the MOF-808 material for organic chloride in a plastic cracking oil was studied in light of its excellent adsorption properties.The MOF-808 materials was prepared,and then the Zrx∶Fey@MOF-808 ma-terials with different doping ratios were prepared by using a hydrothermal synthesis method.Four typical organic chlo-rides in the plastic cracking oil were selected to prepare a model oil,and the optimal x/y ratio was determined to be 1∶0.67 according to the removal rate of organic chlorides in the model oil.The optimal reaction conditions and reuse perfor-mance of adsorption dechlorination experiments were determined,and the corresponding adsorption mechanism was in-vestigated.The results indicated that the as-prepared Zr1∶Fe0.67@MOF-08 adsorption material exhibited has good struc-ture and stability.The removal rate of chloride in the model oil was as high as 97.66% at an adsorption temperature of 50℃,an adsorption time of 2 h,and an agent/oil mass ratio of 1/40.The dechlorination rate remained to be above 85% after repeatedly using the adsorbent for 6 times.The adsorption process conformed to a pseudo-second-order kinet-ic model,belonging to a spontaneous chemisorption process.
关键词
塑料裂解油/氯化物/吸附脱氯/MOF-808/吸附动力学Key words
plastic cracking oil/chloride/adsorption dechlorination/MOF-808/adsorption kinetics引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据