Isopropyl alcohol is widely used as industrial chemical intermediates and common solvents in households, pharmaceuticals, food, cosmetics, and medical purposes. The high purity of isopropyl alcohol requires special separation from its impurity i.e. water due to isopropyl alcohol and water form an azeotropic point, which is difficult to separate using a conventional distillation method. The azeotropic point of this mixture is at isopropyl alcohol mole fraction of 0.68 and temperature of 353.4 K. One of the optimum methods to separate an azeotrope point is through the extractive distillation which use a third component as a solvent. Glycerol is one of the solvents which can be used as a potential entrainer in the extractive distillation. Glycerol is produced in the biodiesel production as a by-product. Moreover, glycerol is an eco-friendly chemical. In this work, the simulation of the extractive distillation of isopropyl alcohol/water system with glycerol as an entrainer was simulated using Aspen Plus. The Non-Random Two-Liquid (NRTL) model was used as thermodynamic model in the simulation. The effect of stage number, binary feed stage, entrainer feed stage, and reflux ratio to the purity of isopropyl alcohol, and reboiler-condenser duties were examined to achieve the optimum design for the extractive distillation column with less energy requirements. The simulation results showed that the optimum configurations in the extractive distillation column design are at 25 theoretical stages, binary feed stage (BFS) of 20, entrainer feed stage (EFS) of 2, and reflux ratio (RR) of 0.5 to produce isopropyl alcohol with the purity of 99.27%. The design and sizing of the extractive distillation column were also proposed in this work.
Di dalam dunia akademik, akademisi tidak pernah lepas dari budaya menulis artikel ilmiah. Baik penulisan artikel untuk mengikuti suatu lomba, memenuhi tugas kuliah, menulis laporan penelitian hingga artikel untuk dipublikasikan pada jurnal baik nasional maupun internasional. Permasalahan utama yang dialami penulis serta mitra dalam menuliskan artikel ilmiah adalah masalah orisinalitas, praktik plagiarisme serta penyusunan refrensi. Plagiarisme merupakan salah satu tindak pidana yang mengambil, menerbitkan atau menyatakan sebagai milik sendiri dari orang lain, dalam hal ini hasil dari suatu pemikiran sang pencipta. Praktik plagiarisme dalam penulisan tugas, karya ilmiah, skripsi maupun disertasi masih banyak kita jumpai di kalangan akademisi, baik mahasiswa, guru maupun dosen. Sebelum kegiatan sosialisasi, dilakukan observasi untuk mengetahui tingkat pengetahuan yang dimiliki oleh para peserta tentang penulisan artikel terutama mengenai plagiasi dan penyusunan refrensi. Metode yang dilakukan adalah tanya jawab. Hampir 90% peserta belum mengetahui cara menggunakan Turnitin dan Mendeley dalam penulisan jurnal. Hasil kuisioner mahasiswa sangat puas dengan adanya pelatihan Turnitin dan Mendeley.
To cite this article: Hartanto, D. et al. (2018). Design and construction of Chem-E-Car SMARTTRONS powered by thermoelectric generator utilising temperature gradient of two reactors.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.