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Soy candle burning rate

soy candle burning rate

Soy Candles have many claimed benefits. Many of these are obvious but others are more difficult to proof. There are no scientific studies comparing the properties of soy wax candles with paraffin candles, except for the one study by K. Rezaei entitled "Combustion Characteristics of Candles Made from Hydrogenated Soybean Oil".
This study showed that soy wax candles had a longer burning time and produced less soot than paraffin candles. He found that the untrimmed soy wax candles had a slightly lower burning rate than paraffin candles but that the trimmed soy wax candles had a 30% lower burning rate.

We compared the burning rate of a soy candle with that of a paraffin candle. We do no not claim that this is a scientific study: it is just a simple experiment! We made container candles using 80 g of wax and 50 mm tea light wicks on a metal foot. The picture shows the candles (paraffin on left, soy wax on right) at different burning times. As you can see, the soy candle actually finished burning a bit earlier. However, this does not proof that the soy candles will always burn faster since the burning rate will depend also on wick size.

In our experiment, the wick size of the soy candle tended to be larger and more split than that of the paraffin candles, even after trimming the wick every two hours. Soy wax and paraffin have about the same heat of combustion, so why would soy candles burn longer? They do so probably because soy candles burn with a smaller flame. Soy wax contains larger molecules with lower volatility, which results in reduced flow of melted wax through the wick.

During this experiment, we noticed something particular. After cool down, the surface of the soy wax was convex whereas the surface of the paraffin was concave! Maybe this characteristic can be used to distinguish both types of wax!

Comments (2)

paraffin wax
Dear

This is Shandong haotian Group Exp and Imp Limited . Glad to get your info from my English friend .

As I know , you have interest in purchasing paraffin from Chinese mainland .
We supply Normal Paraffin , Liquid Paraffin, Fully refined Paraffin , Kerosene to EU ,Indian amd other markets for several years.


Please contact me for any questions .
Br
#1 - daphne - 04/21/2014
EXPERIMENT ON CANDLES BURNING
I REAL WANT TO SEE BURNING RATE ON ONE TYPE OF CANDLES
#2 - LONDIWE - 06/07/2014
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