نتایج جستجو برای: naphthenic acid
تعداد نتایج: 747566 فیلتر نتایج به سال:
In this study, the classes and structures of nitrogen species in coker gas oil (CGO) are characterized by electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) combined with Fourier transform infrared (FT-IR) spectroscopy. The results demonstrate that the m/z of basic and non-basic nitrogen compounds ranges from 180 to 560 and from 200 to 460, res...
During the last years, the aviation sector has been looking into alternatives to kerosene from crude oil, to combat climate change by reduction of greenhouse gas (GHG) emissions and to ensure security of supply at affordable prices. The efforts are also a reaction to commitments and policy packages. Currently, a wide range of possible fuel candidates and fuel blends are discussed in the triple ...
Most studies neglect the presence of thermal cracking reactions in industrial FCC process. Nevertheless, the present work proposes a new model which modified the 10-lumps kinetic model given by Jacob el al. (1976), through to inclusion a new lump named dry gas represent the results of the thermal reactions. Similarly as in the 10-lumps kinetic model, the proposed 11-lumps kinetic model consider...
If oil sands process-affected water (OSPW) is to be returned to the environment, a desire is that it not adversely affect aquatic life. We investigated whether a relevant model fish (rainbow trout, Oncorhynchus mykiss) could detect OSPW using its olfactory sense (smell) and whether exposure to it would result in behavioral changes. We also investigated whether ozonation of OSPW, which lowers th...
Discontinuous molecular dynamics simulation and thermodynamic perturbation theory have been used to study thermodynamic and transport properties for a large number of organic compounds. The fundamental basis of the approach relies on a stepwise characterization of the disperse interactions and blister potentials for the hydrogen bonding. It has been demonstrated that these types of attractive i...
در سال های اخیر،کاربرد نانوکاتالیست های ناهمگن بر پایه ی پالادیوم به طور وسیعی گسترش یافته است. در این پایان نامه، ابتدا کمپلکس های تک هسته ای پالادیوم به دو صورت پالاداسیکل و مسطح مربعی با استفاده از لیگاندهای 4- برموبنزوکسیم، 2و4و6- تری متیل پیریدین و پیریدین به ترتیب زیر سنتز شدند. [pd(oac){c,n-(c6h3brc(ch)=noh)-2}(py)] (1) [me3pyh][pd(me3py)(cl)3] (2) جهت شناسایی کمپلکس های سنتز...
از روش استخراج با سیال فوق بحرانی (sfe) برای استخراج روغن های دانه بادام استفاده گردیده است. پارامتر های آزمایشی موثر در روش sfe مثل فشار، دما، حجم اصلاحگر، زمان استخراج استاتیک و دینامیک با استفاده از یک طراحی مختلط مرکزی(ccd) بعد ازطراح فاکتوریال جزئی 2n–1بهینه شدند.جهت بهینه سازی شرایط استخراج از طراحی مرکب مرکزی (ccd) پس از یک مرحله غربال گری استفاده شد. مدل استفاده شده، شرایط استخراج شامل ...
Reliable delineation of aquatic toxicity cut-offs for poorly soluble hydrocarbons is lacking. In this study, vapor and passive dosing methods were applied in limit tests with algae daphnids to evaluate the presence or absence chronic effects at exposures corresponding water solubility representative from five structural classes: branched alkanes, mono, di, polynaphthenic (cyclic) alkanes monoar...
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