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Composition and Temperature Dependence of Excess Volume of Heavy Oil-Stocks Mixtures + (Gas oil or Toluene or Reformate)
تاثير النسب الوزنية ودرجة الحرارة على الحجم الزائد للاساسات زيت التزليقبوجود المضافات الهيدركاربونية (زيت الغاز+ التلوين + الريفورميت)

Authors: Shahad Z. Atta شهد زهير عطا --- Haidar M. Al-Qamaje حيدر موفق توفيق --- Ezzat N. Slaiman عزت نيازي سليمان
Journal: Al-Khwarizmi Engineering Journal مجلة الخوارزمي الهندسية ISSN: 18181171 23120789 Year: 2011 Volume: 7 Issue: 3 Pages: 59-67
Publisher: Baghdad University جامعة بغداد

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Abstract

Binary mixtures of three, heavy oil-stocks was subjected to density measurements at temperatures of 30, 35 and 40 °C. and precise data was acquired on the volumetric behavior of these systems. The results are reported in terms of equations for excess specific volumes of mixtures. The heavy oil-stocks used were of good varity, namely 40 stock, 60 stock, and 150 stock. The lightest one is 40 stock with API gravity 33.69 while 60 stock is a middle type and 150 stock is a heavy one, with API gravity 27.74 and 23.79 respectively. Temperatures in the range of 30-40 °C have a minor effect on excess volume of heavy oil-stock binary mixture thus, insignificant expansion or shrinkage is observed by increasing the temperature this effect becomes more significant although the heavy oil-stocks is spiked with hydrocarbons like (gas oil, toluene and reformate). Blending of Heavy oil-stocks with hydrocarbons spikes (gas oil, toluene and reformate) form non-ideal mixtures, for which excess volume can be positive or negative depending on nature species. Spiking of Heavy oil-stocks with either gas oil or reformate resulted in negative excess volume. This shrinkage is greater for the lowest boiling point spike as in the case of reformate, While, the presence of methyl groups in aromatic rings results in a positive excess volume, as shown in toluene when blended with 40 stock but a negative excess volume was found when blended with 60 stock and 150 stock. The API gravity of heavy oil-stocks has an effect on excess volume when the oil-stocks spiked with hydrocarbons like (gas oil, toluene and reformate). This 40 stocks as a typical light types resulted in minimum negative excess volume of -0.47 at 30 °C, when it was spiked with the gas oil; while the spiked heavy oil-stock with kerosene shows a maximum excess volume of -15.56 at 40 °C.

تم استخدام ثلاث انواع من اساسات زيت التزليق وهي الاستوك 40 وهو الاخف من حيث الوزن الجزيئي والمتوسط وهو الاستوك 60 والاثقل وزنا جزئيا الاستوك 150 لمعرفة السلوك الحجمي لمخاليط تلك الزويت وكذلك سلوك تلك الزيوت حجميا عند اضافة المضافات الهيدروكاربونية مثل (زيت الغاز و التلوين و الريفورميت) وكذلك بدرجات حرارة متغيرة (30-40 °م). حيث ان اضافة هذه المواد تؤدي الى زيادة في الحجم قد تكون موجبة او سالبة بمعنى اخر ان هذه الاضافات قد تودي الى انكماش او تمدد حجمي في تلك الخلائط. كما ان لدرجة الحرارة تاثير ملحوظ على الزيادة الحجمية لكل مزيج تمت دراسته. حيث تبين ان اضافة المادة الهيدروكاربونية ذات الطابع البرافييني (زيت الغاز) يؤدي الى حدوث انكماش ملحوظ في حجم الخلائط وكذلك المواد الهيدروكاربونية ذات درجة الغليان الواطى كما هو الحال في (الريفورميت) بينما اضافة المادة الهيدروكاربونية ذات الطابع الوروماتي (التلوين) يؤدي الى تمدد تلك الخلائط ماعدا خلائط الاستوك 150و 60 حيث ان اضافة التلوين الى تلك الخلائط يؤدي الى انكماشها والسبب في سلوك الزايلين بصورة عامة يرجع الى وجود مجموعتي المثيل في الحلقة (التلوين). تم الحصول على اعلى نسبة من الوزن الزائد وهي 15,56 عند اضافة الريفورميت الى الاستوك 150.


Article
Investigation of Correlation and Prediction of Excess Molar Volume Using Different Equations of States
دراسة الارتباط و تنبؤ الحجم الفائض باستخدام معادلات الحالة المختلفة

Authors: M. O. Abdullah --- Venus M. BakallBashy --- Fatma Dhaif Ali
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 14 Part (A) Engineering Pages: 2746-2759
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Prediction and correlation of accurate value of excess molar volume VE are ofgreat interest for adequate design of industrial process and for theoriticalpurpose.Soave RedlichKwong (SRK-EOS), Peng-Robinson (PR-EOS), and Peng-Robinson-Stryjek-Vera (PRSV-EOS) are selected.Five Mixing Rules are appliedon different groups systems of different polarity which are: Conventional MixingRules, Quadratic Mixing Rules, Adachi and SugieMixing Rules,a modified Adachiand Sugie mixing rules. Another tried method to extend the applicability of CEOSby usingthe best applicable EOS from the three selected EOS with the PRSV-EOSwith a new correlation method thatuses Excess Gibbs free energy (GE) and Huron-Vidal Method.Also by means of using Huron-Vidal Mixing Rules (HV) .theHuron-Vidal Method is developed by using an adjustable parameter hij.Thedeveloped applied method gave very acceptable results for binary mixtures. To findthe applicability of the gated constant for different group families; same constantsof the binaries which confirm the ternary system are quite well applicable tocalculate VE data for ternary system with very reasonable accuracy.


Article
EXCESS VOLUMES OF HEAVY OIL-STOCKS MIXTURES + (KEROSENE OR XYLENE) AT 303 K

Author: Haidar M. Al-Qamaje
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2010 Volume: 11 Issue: 4 Pages: 47-57
Publisher: Baghdad University جامعة بغداد

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Abstract

Binary mixtures of three, heavy oil-stocks had been subjected to density measurements. The data had been acquired on the volumetric behavior of these systems. The heavy oil-stocks used were of good varity, namely 40 stock, 60 stock, and 150 stock. 40 stock is the lightest one with ˚API gravity 33.7 while 60 stock is middle type and 150 stock is heavy one, with ˚API gravity 27.7 and 23.8 respectively. Stocks with Kerosene or Xylene form non-ideal mixtures, for which excess volume can be positive or negative. Mixtures of heavy oil-stocks with paraffinic spike (kerosene) show negative excess volume. While, aromatic rings results a lower positive excess volume, as shown in xylene when blending with 40 stock and 60 stock but a negative excess volume when blending with 150 stock. The gravity of oil-stocks has an effect on excess volume when the oil-stocks spiked with Kerosene or Xylene. Those, 40 stock as typical light type resulted in minimum negative excess volume of -2.18, when it was spiked with the kerosene, while the spiked heavy oil-stock with kerosene gave a maximum excess volume of -11.2. The Redlich-Kister equation was used to fit the excess volume values, and the coefficients and estimate of the standard error values were presented.

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