ESTERIFICATION REACTION KINETICS OF THE MANUFACTURING OF ESTERS BASED LUBRICANT
Lubricants are high viscosity oils that are used to form a separating layer between surfaces made of metal that touch and move. Mineral oil is the raw material most commonly used to make lubricants. However, mineral oil based lubricants can cause environmental pollution. An alternative to mineral...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/56449 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Lubricants are high viscosity oils that are used to form a separating layer between surfaces
made of metal that touch and move. Mineral oil is the raw material most commonly used
to make lubricants. However, mineral oil based lubricants can cause environmental
pollution. An alternative to mineral oil is vegetable oil. Lubricants that are made from
vegetable oils are called biolubricants. Biolubricants have disadvantages, namely low
oxidative stability, and unfavorable low temperature fluidity. This is due to the presence
of ?-hydrogen in the glycerol molecule. Glycerol can be replaced with polyols which do
not have ?-hydrogen such as Trimethylolpropane (TMP). In this study, an esterification
reaction experiment was carried out using oleic acid (OA) and trimethylolpropane (TMP)
with a concentration ratio of TMP:OA (3:1), using a 3.5%-w PTSA catalyst and carried
out at a temperature variation of 140-180oC. From the experiment, it was found that the
higher the temperature, the higher the oleic acid conversion value in the esterification
reaction with the maximum conversion value of 79.4% at 180oC. From the experiment it
was also determined that the esterification reaction for making biolubricant is a fourth
order reaction with an activation energy value of 48644 J/mol. The biolubricant product
obtained have an acid number in the range of 6-13 mg-KOH/g, and a kinematic viscosity
value (at 40oC) of 878.75-1928.75 cSt making the final product classified as ISO VG
1000 and ISO VG 1500 lubricant.
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