نتایج جستجو برای: onset pressure of asphaltene
تعداد نتایج: 21211436 فیلتر نتایج به سال:
Abstract Bitumen contains approximately 5 wt% sulfur so it must be removed before being used as fuel. Herein, we performed oxidative desulfurization of bitumen at room temperature using n-pentane and ultrasound to reduce viscosity mix the bitumen-dissolved aqueous reaction solution physically. The states in ratio were investigated confirm process. Additionally, developed a novel method for sepa...
Asphaltenes are known to cause problems related flocculation, precipitation, and plugging, either in the formation, production lines, processing equipment. Different models have been proposed predict thermodynamic conditions under which asphaltenes precipitate over past years. This work analyses performance of various on their capability match literature experimental data precipitated asphalten...
a new approach to simultaneously enhancing heavy oil recovery and hindering asphaltene precipitation
a new chemical compound is developed at petroleum university of technology to enhance therecovery of the free imbibition process and simultaneously hinder asphaltene precipitation. thecompound is tested on heavy oil samples from marun oil field, bangestan reservoir. the effects ofthe chemical compound on viscosity, hydrocarbon composition, and average molecular weight ofthe heavy oil are invest...
رسوب اجزای آلی هیدروکربنی و بهویژه آسفالتن یکی از مهمترین معضلات صنایع بالادستی و پاییندستی نفت است که در سازندهای نفتی مخزن، تجهیزات بهرهبرداری تولید، خطوط لوله انتقال نفت و ذخیرهسازی مشکلاتی را ایجاد میکند. بدین لحاظ شناخت سازوکار تشکیل رسوب (سینتیک رشد و توسعه ذرات جامد آلی) و تعیین نقطة ظهور رسوب آسفالتن در نفتهای آسفالتنی از اهمیت بالایی برخوردار است. در این تحقیق، در ابتدا در محدود...
Wound healing and reduction of its recovery time is one of the most important issues in medicine. Wound is defined as disruption of anatomy and function of normal skin. This injury could be the result of physical elements such as surgical incision, hit or pressure cut of the skin and gunshot wound. Chemical or caustic burn is another category of wound causes that can be induced by acid or base...
Background: The aim of this study was to investigate the effect of muscle fatigue on ankle joint moment and center of pressure during single-leg stance, perturbed by forward or backward platform perturbations. Methods : In this semi-experimental study fatigue induced to knee muscles by using an ergometer (monark). Surface elecromyographic signals were recorded from knee muscles during maxim...
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