کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
633970 1456045 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved thiophene solution selectivity by Cu2+, Pb2+ and Mn2+ ions in pervaporative poly[bis(p-methyl phenyl) phosphazene]desulfurization membrane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Improved thiophene solution selectivity by Cu2+, Pb2+ and Mn2+ ions in pervaporative poly[bis(p-methyl phenyl) phosphazene]desulfurization membrane
چکیده انگلیسی
Due to interfacial defects and agglomeration, role of metal ions in mixed matrix membrane during pervaporation is not fairly demonstrated and not fully taken advantage of. Through surface modification of pristine PMePP membrane and the followed ion exchange treatments, PMePP-M membranes containing Cu2+, Mn2+, or Pb2+ ions were obtained. X-ray photoelectron spectroscopy (XPS) analysis confirms the successful exchange of Cu2+, Mn2+, or Pb2+ ions onto the membrane surface. Pervaporation results show that the removal of thiophene from model gasoline by pristine PMePP membrane or modified PMePP membranes is a solution-diffusion controlled process while it shifts to a solution controlled process for PMePP-M membranes. It provides important evidence for the facilitated thiophene mass transport via metal ions. PMePP-M membranes show superior selectivity in a Robeson type plot and their performance locates above the upper bound of literature reported thiophene permeability and selectivity. In the meantime, it is proved that post-treatment and control of oxidation temperature can compensate the decrease of pervaporative flux caused by the change in surface hydrophobicity and the introduction of electric charge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 454, 15 March 2014, Pages 463-469
نویسندگان
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