Continuous biodiesel production in a helicoidal reactor using ultrasound-assisted transesterification reaction of waste cooking oil was written by Delavari, Armin;Halek, Farah;Amini, Mohammad. And the article was included in Clean Technologies and Environmental Policy in 2015.Formula: C20H40O2 The following contents are mentioned in the article:
Designing of a continuous biodiesel production system from waste cooking oil with ultrasonic homogenizer assistant through transesterification reaction was studied. Through some pre-tests based on cavitation phenomenon to accelerate the transesterification reaction, two types of reactors (batch and continuous) were used. GC-MS results showed the total content of 94.2 % of Me esters derived from different fatty acids formed in a batch reactor using a magnetic stirrer and an elec. heater. These results were then compared to those of two ultrasonic homogenizers with low and high capacities of 400 and 1,500 W, which tested successfully under mild conditions. The results indicated the advantages of using ultrasonic homogenizer. The continuous system consisted of a 1,500 W ultrasonic homogenizer and glass helicoidal reactor with a tube length of 20 m. This set-up was kept submerged in a hot water bath. As a result, the reaction time decreased to 150 s, the methanol/oil molar ratio was 8.6 and the weight % of NaOH/oil was 0.5 %. After separation of undesired contents, the phys. and chem. characteristics of the final product were measured according to ASTM standard methods. Study of performance of the system also showed a significant improvement in yield of the reaction (90 %) compared to prior studies. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Formula: C20H40O2).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Formula: C20H40O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics