Hakan Temur

The effects of long-term storage on the cold flow properties and viscosity of canola-based biodiesel

ABSTRACT In this study, the effects of long-term storage on the viscosity and cold flow properties of biodiesel were investigated. Canola oil with a high content of unsaturated fatty acid was used to produce biodiesel in the experiments. Biodiesel sample was kept in ordinary atmospheric storage conditions for 6 months. The samples were taken from the biodiesel feedstock in every 30 days and cold flow properties and kinematic viscosity of the samples were measured. During 6-month storage, no significant deterioration was observed in cold flow properties and kinematic viscosity of biodiesel. Additionally, the same pour point (PP) and cold filter plugging point (CFPP) values (−11°C) were obtained during this period.

Sulu Ortamda SO2 Gazı İle Fosfat Kayasındaki Kalsitin Çözünme Kinetiği

Yap lan bu cal mada fosfat kayas nda bulunan karbonatl minerallerin sulu ortamda SO2 gaz ile cozunme kineti i incelenmi tir.Cozundurme i lemlerinde reaksiyon s caklve kar t rma h z parametre olarak secilmi tir. Reaksiyon s cakl oran ve tanecik boyutunun kuculmesi ile cozunme oran artm t r. Cozunme reaksiyonunun homojen 1. mertebe oldu u ve aktivasyon enerjisinin 21,70 kJ.mol-1 oldu u tespit edilmi tir