عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLets693865
عنوان و نام پديدآور
عنوان اصلي
The oxidative stability of FAME in the model Crankcase environment
نام عام مواد
[Thesis]
نام نخستين پديدآور
Hall, James
نام ساير پديدآوران
Davies, Rob ; Long, Nicholas
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Imperial College London
تاریخ نشرو بخش و غیره
2013
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
Imperial College London
امتياز متن
2013
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
The use of biodiesel has increased in recent years due to the implementation of governmental policies driven by environmental, economic and political reasons. Biodiesel is composed of fatty acid methyl esters (FAME), which can be derived from plant, marine and animal sources. There have been reports of some potential problems associated with biodiesel use in modern diesel engines, with lubricant dilution by blended biodiesel fuels leading to accumulation of FAME in the oil sump in the crankcase. This project focuses on the design and implementation of an experimental model based on the Rancimat apparatus that can simulate certain aspects of the FAME degradation chemistry occurring in the crankcase and oil sump. An analysis procedure to compliment the experimental model is applied to carry out product distribution analysis on a series of (C18) model FAME, identifying and quantifying the oxidation products formed under the experimental conditions, where epoxides are the major monomeric degradation. Some oxidation kinetic parameters have been investigated using biodiesel samples, with noticeable differences in oxidation rates found when FAME are oxidised individually and when in mixtures. Kinetic factors of FAME and model base oil in single and multi-component systems have also been investigated, with the base oil displaying good oxidative stability in mixtures as well as on its own The influence of antioxidants on stabilising various model systems has shown synergistic effects. Combinations of primary and secondary antioxidants have displayed good synergy, with the suppression of the rate of hydroperoxide formation by primary antioxidants enhancing the effectiveness of the secondary antioxidant. Primary antioxidants have been observed to affect the onset of oxidation, whilst secondary antioxidants decrease the hydroperoxide and epoxide, but increase the alcohol yields as a result of autoxidation.
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
Hall, James
نام شخص - ( مسئولیت معنوی درجه دوم )
مستند نام اشخاص تاييد نشده
Long, Nicholas
مستند نام اشخاص تاييد نشده
Davies, Rob
شناسه افزوده (تنالگان)
مستند نام تنالگان تاييد نشده
Imperial College London
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
