Adsorption and removal of organochloride from plastic oil by MOF-808-modified material

Abstract

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 materials with different doping ratios were prepared by using a hydrothermal synthesis method. Four typical organic chlorides 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 performance of adsorption dechlorination experiments were determined， and the corresponding adsorption mechanism was investigated. The results indicated that the as-prepared Zr1∶Fe0.67@MOF-08 adsorption material exhibited has good structure 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 kinetic model， belonging to a spontaneous chemisorption process.

Key words: plastic cracking oil, chloride, adsorption dechlorination, MOF-808, adsorption kinetics

References

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