Gel Point

Basics

• The temperature at which diesel or biodiesel fuel (should this be "oils"? Happens with Plant Oils such as Coconut Oil as well.) freezes solid and can no longer flow by gravity or be pumped through fuel lines.
• This phenomenon happens when a fuel reaches a low enough temperature whereby enough wax crystals have formed to prevent any movement in the oil.
• For the fuel to become pumpable again, it needs to be brought above the gel point temperature to the Un-gel point, which is typically near its pour point. However, most of the waxes will still remain in solid form and the fuel has to be warmed up further until its Remix temperature in order to completely remelt and redissolve the waxes.

External Links

• The Wikipedia Page on Gel Point (In a Petrolium Context)
• The Wikipedia Page on Gel Point (supposedly VERY unfinished/verified?)