Abstract
Polyethylene glycol [PEG, H(OCH2CH2)nOH] like PEG-600, a green extractant for organic N-compounds in fuel oil, was very active for non-basic nitrogens but not effective for basic ones. Modification of PEG that replaced –OH group with –OCH2COOH group can produce HOOCCH2(OCH2CH2)nOCH2COOH (dcPEG). For denitrogenation, dcPEG-600 was highly effective for both basic and non-basic nitrogens. N-distribution coefficient [DN, (μgN·gdcPEG−1)/(μgN·goil−1)] of dcPEG-600 to n-octane can reach as high as 200 for indole, 92.6 for pyrrole, 42.0 for quinoline, and 81.5 for pyridine, respectively. Besides, denitrogenation selectivity of dcPEG-600 to toluene (DN/Dtoluene) can amount to 462 for indole, 230 for pyrrole, 146 for quinoline, and 366 for pyridine, respectively. The high performance was ascribed to contribution of active O atom on ether group and active H atom on –COOH group. The active O atom (Lewis basic site) formed H-bond with the non-basic nitrogen (Brønsted acid). The active H atom (Brønsted acidic site) not only interacted with the basic one (Lewis base) but also brought in the good selectivity. Moreover, dcPEG-600 was still effective for real oil and could be recycled for several times without the denitrogenation performance significantly decreasing.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
