Waxes are a commonly encountered precipitate that can result in gelation of crude oils and cessation of flow in pipelines. In this work we develop a model wax-oil system that exhibits rheological behavior similar to waxy crude oils encountered in production scenarios. To study the consequences of gelation on the rheology of the model system we perform simultaneous measurements of the bulk flow ...

In this paper, rapeseed oil was modified with diethylenetriamine to obtain a vegetable oil-derived pour point depressant (PPD), which used reduce the and improve flowability of crude (from Changqing Oilfield), has high content paraffin. Various instruments such as differential scanning calorimetry (DSC), polarized optical microscopy (POM), viscometer were investigate performance PPD. The result...

The study of phase change heat transfer crude oil melting is important for preheating and restarting pipelines. Combining the characteristics waxy melting, a novel mathematical model was established, which can accurately describe nonlinear release latent heat, liquid-solid interface changes, natural convection other key problems. In process heating variation law solid-phase position in pipe at ...

Adjuvants have been used to improve pesticide application efficiency and effectiveness for many years. However, knowledge on quantitative reactions of adjuvant-amended pesticide droplets on Article Request Page http://asae.frymulti.com/azdez.asp?JID=5&AID=29662&CID=pitt2010&T=1[12/28/2010 12:43:57 PM] foliage is lacking. Evaporation rate and wetted area of 500 μm droplets with four different ad...