Oxidation Stability Comparison Between Zinc Dialkyldithiophosphate And Zinc Diamyldithiocarbamate Induced Palm Oil Biolubricants

Nadzri, Muhamad Naqib (2016) Oxidation Stability Comparison Between Zinc Dialkyldithiophosphate And Zinc Diamyldithiocarbamate Induced Palm Oil Biolubricants. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The environmental concern growth towards pollution due to usage of mineral oils which non-environmental friendly causes consideration of new lubricant usage such as vegetable oils. However, vegetable oils have poor oxidation stability restrain the development of new oil. This study is focusing on developing new bio-lubricant with zinc ion anti-oxidants additives. A commercialized palm oil is chosen were blended through direct introduction methods into two different samples with diverse concentrations of ZDDP and ZDDC with each at 1.2wt%, 1.6wt% and 2.0wt% concentrations and heated for 20minutes in 50°C for proper formulation. The new bio-lubricant metal content were tested with ASTM D6595 and its oxidation characteristics are analyzed with ASTM D2272. The samples flash point properties then tested with ASTM D93. Through the metal content test, it indicates successful formulation for 2.0wt% of ZDDP bio-lubricants with phosphorus content at 791.64ppm and zinc content at 825.74ppm. At 2.0wt% of ZDDC bio-lubricants also shows successful formulation with lower phosphorus and zinc content at 28.44ppm and 673.06ppm. From the oxidation stability test, it indicates that anti-oxidant additives improve bio-lubricant oxidation stability with 2.0wt% of ZDDP degraded at 128 minutes, while 2.0wt% of ZDDC degraded at 62 minutes. However, the mineral oil were found better performance in oxidation stability at 300 minutes. From flash point test, the bio-lubricant were found better in performance compared to mineral oils which only reached 204°C, while 2.0wt% ZDDP at 205°C and 2.0wt% ZDDC at 224°C. From the study of the newly developed bio-lubricant shows palm oil with 2.0 wt% of ZDDP possess the desirable result. It can be concluded that with further improvements in oxidative stability, palm oil bio-lubricant are suitable to be used as industrial lubricant.

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