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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Idral Idral
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Engineering

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Pembuatan Biodiesel Berbahan Baku CPO Menggunakan Reaktor Sentrifugal dengan Variasi Rasio Umpan dan Komposisi Katalis Ardago Lengga Muda Siregar; Idral Idral; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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One  of many  sources  of  alternative  fuel  is  biodiesel  . Biodiesel  production  cost  is  still quite  expensive,  it  need  a  technology  to  reduce  thecost  of  biodiesel  production  .  Centrifugal reactor  technology  is  one  of  the  alternative  technology  of  biodiesel  production, which  is  very likely to be developed .Study of biodiesel production using palm oil as the feedstock, methanol as the  reagent, and NaOH as catalyst.This  research use centrifugal  reactor as  the  reactor, which has  a  pre-heater  for  feed,  feed  tank  and  pumps.  The  study  was  conducted  at  the  reaction temperature of 60ºC with a residence time in the reactor for 2 hours . CPO mixture , methanol , and a catalyst in the feed the reactor with variation in the molar methanol : CPO ( 3:1 , 6:1 , 9:1 , 12:1  ) and  the variation of  the  composition of  the catalyst  ( 0.5, 0.75, 1 %  - w  )  . From  the results of the study showed that the molar ratio and catalyst composition affects the speed of the reaction  to reach equilibrium reaction  . The results showed biodiesel using centrifugal reactor reaches  a  yield  of  92.6 %  under  the  conditions  of  9:1  molar  ratio  with  0.75 %-w  catalyst  . Characteristics of biodiesel produced in the form of viscosity , density , acid number , and flash point of biodiesel are qualified as Indonesian standards of Biodiesel.
Modifikasi Bioplastik Berbasis Pati-Polivinil Alkohol (PVA) Dengan Cross-Linking Agent Asam Sitrat Dan Pemplastis Sorbitol Yoga Pratama; Bahruddin Bahruddin; Idral Idral
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bioplastic characteristics are influenced by various parameters, including levels of cross linking agents (such as citric acid) and plasticizers (such as sorbitol). The research was to study the effect of citric acid and sorbitol levels on mechanical properties, cross linking (characterized by ester groups), and biodegradation of bioplastics based starch-polyvinyl alcohol (PVA). Bioplastic manufacturing is done by mixing sago starch -PVA (1: 3), sorbitol (10, 15, 20% w/w) and citric acid (2.5; 5; 7.5% w/w) at 90ºC for 55°C minutes, optimization of process conditions is determined by response surface methodology (RSM). The parameters tested include tensile strength test, elongation, and biodegradation. The most significant factor affecting all responses was the level of citric acid and sorbitol. The optimum process conditions were obtained at 4.8% w / citric acid content and sorbitol 11.4% w / w with a tensile strength response of 26,34 MPa, elongation 379%, and 49,18% biodegradation. Keywords: bioplastics, citrid acid, sorbitol, polyvinyl alcohol, RSM, sago starch
Pengaruh Suhu Dan Waktu Distilasi Terhadap Komposisi Kimia Asap Cair Dari Kulit Durian Widiya Widiya; Idral Idral; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Purification  of  liquid  smoke  is  very  important  for  the  safety  of  liquid  smoke  for preservative  food.  Distillation  was  done  reduces  carsinogenic  compound  such  as  tar  and benzo(a)pyrene and determined 1st, 2nd, 3th grade of smoke  liquid. The research was done using distillation process, with temperature and time variable. The results of GCMS analysis indicated no detected  tar and benzo(a)pyrene. Maximum  temperature  to get of  liquid smoke 1st  grade  at  125oC with  distillation  time was  30 minutes.  At  this  condition  value  of  acid, carbonyl  and  phenol  were  20.53%,  27.05%  and  0% Keywords: Pyrolysis, Distillation, Liquid Smoke
Pengaruh Variasi Temperatur Dan Waktu Terhadap Rendemen Pirolisis Limbah Kulit Durian Menjadi Asap Cair Nurrassyidin Nurrassyidin; Idral Idral; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Manufacturing of   Liquid Smoke from durian’s peel waste biomass  that used for preservation by pyrolysis process  to produce more valuable and reliable product. Purpose of  this research  is  to find dependence of   yield  liquid smoke from pyrolysis durian’s  peel  waste  to  temperature  and  time.  The  temperature  is  250°C,  275°C, 300°C, 325°C and 350°C also the time is 90, 120 and 150 minutes that did with one set of pyrolysis equipment. From this research has been got the result of yield at each variabel, 250°C = 5.95%, 275°C = 10.57%, 300°C = 11.12%, 325°C = 11.22% dan 350°C =19.09% and 90 minutes = 14.31%, 120 minutes = 19.10% dan 150 minutes = 26.52%. so at the highest temperature and time will be get the highest yield. Keywords: Durian’s Peel, Liquid Smoke, Preservation, Pyrolysis
Co-Authors Ardago Lengga Muda Siregar Bahruddin Nurrassyidin Nurrassyidin Widiya Widiya Yoga Pratama Zultiniar Zultiniar