caa a22 4500 606168842 CHVBK 20210128100709.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10098-014-0790-z doi (NATIONALLICENCE)springer-10.1007/s10098-014-0790-z Continuous biodiesel production in a helicoidal reactor using ultrasound-assisted transesterification reaction of waste cooking oil [Elektronische Daten] [Armin Delavari, Farah Halek, Mohammad Amini] 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 methyl esters derived from different fatty acids formed in a batch reactor using a magnetic stirrer and an electrical heater. These results were then compared to those of two ultrasonic homogenizers with low and high capacities of 400 and 1,500W, which tested successfully under mild conditions. The results indicated the advantages of using ultrasonic homogenizer. The continuous system consisted of a 1,500W ultrasonic homogenizer and glass helicoidal reactor with a tube length of 20m. This set-up was kept submerged in a hot water bath. As a result, the reaction time decreased to 150s, the methanol/oil molar ratio was 8.6 and the weight% of NaOH/oil was 0.5%. After separation of undesired contents, the physical and chemical 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. Springer-Verlag Berlin Heidelberg, 2014 Biodiesel nationallicence Continuous process nationallicence Ultrasonic nationallicence Waste cooking oil nationallicence Delavari Armin Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut Halek Farah Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut Amini Mohammad Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/1(2015-01-01), 273-279 1618-954X 17:1<273 2015 17 10098 https://doi.org/10.1007/s10098-014-0790-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10098-014-0790-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Delavari Armin Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut NATIONALLICENCE 700 1- Halek Farah Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut NATIONALLICENCE 700 1- Amini Mohammad Department of Energy and Environment, Materials and Energy Research Center (MERC), P. O. Box 14155-4777, Tehran, Iran aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/1(2015-01-01), 273-279 1618-954X 17:1<273 2015 17 10098