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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Semantik : Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya
Putri Azizah
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Arts Education Engineering Languange, Linguistic, Communication & Media

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Pengaruh Kecepatan Pengadukan Terhadap Sintesis Biodiesel Dari Minyak Jarak Menggunakan Katalis La/NZA Putri Azizah; Syaiful Bahri; Khairat Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel is one of alternative energy to replace fossil fuels from vegetable oil. The aims of this research were to produce biodiesel from castrol oil using heterogen catalyst La/NZA, to studythe effect of agitation speed and the ratio of impregnation La on NZA to the yield of biodiesel and to determine the characteristics of catalyst and biodiesel. The La/NZA catalyst is made bygrinding the natural zeolite to a size of -100 + 200 mesh, then the zeolite is activated using solution of HCL and NH4Cl, then it was dried. La is impregnated into NZA then dried using ovenand calcination. Production of biodiesel is carried out through two stages: esterification and trans-esterification. Before esterification, degumming process was done to remove impuritiesand gum contained in the oil. While in the trans-esterification process, variation of impregnation La on NZA are 0% La, 1% La and 3% La and variation of agitation speed are 300 rpm, 400 rpmand 500 rpm for 80 grams of castrol oil and methanol with the ratio of oil : methanol 1 : 9 was inserted to trans-esterification reactor, reaction lasted for 120 minutes at 60ºC. The highest yieldresulted on using 3%La/NZA catalyst with agitation speed 400 rpm which is 88.15%. Characteristics of the catalyst that has a surface area and ratio of Si/Al are large enough withbiodiesel produced in accordance with predefined standards (SNI 04-1782-2015).Keywords: biodiesel, La/NZA, castrol oil, transesterification.
Keterampilan Menulis Teks Deskripsi Dalam Pembelajaran Bahasa Indonesia Sekolah Dasar Nazla Asyifa; Putri Azizah; Valen Tania
Semantik : Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya Vol. 2 No. 3 (2024): Agustus: Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya
Publisher : Asosiasi Periset Bahasa Sastra Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/semantik.v2i3.851

Abstract

Writing descriptive text is an activity carried out by someone in telling or describing a particular object so that the reader will be able to know clearly what the general description of the object being discussed is. At the elementary school level, when learning Indonesian, writing descriptive texts is one of the learning achievements that must be achieved by students. The development of descriptive text writing skills can be achieved using the problem based learning method so that it allows students to think critically during learning so as to improve student learning outcomes.
Co-Authors Khairat Khairat Nazla Asyifa SYAIFUL BAHRI Valen Tania