These additives modify the wax crystal size, shapes, agglomeration and dispersancy at the lower temperatures to ensure lower operability temperatures maintain the fluidity of the fuel. When temperatures drop considerably, problems may occur in instances where fuels have been transported to or from colder climates and/or then mixed with cold diesel etc.
The problem is exacerbated when biodiesel is used, whilst lubricity is improved in the blended mixture, the cold flow and pour point often suffer. These issues cost end users money to rectify blocked pipes, filters or systems, and heat to aid fuel mobility.
The most cost-effective solution is to treat ‘preventatively’ with CFPP, PPD or wax anti-settling aids (WASA) depending on the application to alleviate these problems and unnecessary additional costs. In refineries, these additives can possibly upgrade heavy fuels used in diesel fuels which can result in releasing lower feed costs for an additional income to the refinery.