relation: https://khub.utp.edu.my/scholars/7470/ title: Biodiesel Production from Palm Oil Using Micro Tube Reactors: Effects of Catalyst Concentration and Residence Time creator: Azam, N.A.M. creator: Uemura, Y. creator: Kusakabe, K. creator: Bustam, M.A. description: Recognizing the widespread of negative impact from the usage of fossil fuels, biodiesel has been explored to ensure the sustainability of the environment. Recently, microtube reactor has been widely studied for continuous synthesis of biodiesel production. Therefore, this paper is intended to investigate the transesterification of palm oil using micro- and milli-channel reactors. The research was conducted to study the effects of catalyst concentration (0.5-5.0 wt) and residence time (60-180 s) for two different tube internal diameters of 1.6 and 0.58 mm. The results showed that the oil conversion and FAME yield are greatly influenced by the tube internal diameter, catalyst concentration and residence time. The effect of tube internal diameter may be attributed to mass transfer effect between oil and methanol phases. The microtube reactor achieved more than 95 at 4.5 wt of catalyst concentration and 180 s of residence time. Besides, the ester content determined by GC-FID analysis is a good estimation to the FAME yield determined by HPLC analysis. © 2016 The Authors. Published by Elsevier Ltd. publisher: Elsevier Ltd date: 2016 type: Conference or Workshop Item type: PeerReviewed identifier: Azam, N.A.M. and Uemura, Y. and Kusakabe, K. and Bustam, M.A. (2016) Biodiesel Production from Palm Oil Using Micro Tube Reactors: Effects of Catalyst Concentration and Residence Time. In: UNSPECIFIED. relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013926020&doi=10.1016%2fj.proeng.2016.06.462&partnerID=40&md5=72faa5f85f730ba83e810e961345bd53 relation: 10.1016/j.proeng.2016.06.462 identifier: 10.1016/j.proeng.2016.06.462