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BIOFUEL PRODUCTION FROM PALM OLEIN BY CATALYTIC CRACKING PROCESS USING ZSM-5 CATALYST Tambun, Rondang; Gusti, Oktris Novali; Nasution, Muhammad Anshori; Saptawaldi, Rangga Pramana
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.8733

The depletion of fossil energy reserves raises the potential in the development of renewable fuels from vegetable oils. Indonesia is the largest palm oil producer in the world, where palm oil can be converted into biofuels such as biogasoline, kerosene and biodiesel. These biofuels are environmentally friendly and free of the content of nitrogen and sulfur through catalytic cracking process. In this research, palm olein is used as feedstock using catalytic cracking process. ZSM-5 is used as a catalyst, which has a surface area of 425 m2/g and Si/Al ratio of 50. Variables varied are the operating temperature of 375 oC - 450 Â°C and reaction time of 60 minutes - 150 minutes. The result shows that the highest yield of liquid product is 84.82%. This yield is obtained at a temperature of 400 Â°C and reaction time of 120 minutes. The yield of the liquid product in the operating conditions consisting of C6-C12 amounted to 19.47 %, C14-C16 amounted to 16.56 % and the C18-C28 amounted to 48.80 %.

Kemampuan Daun Jambu Biji sebagai Inhibitor Korosi Besi pada Medium Asam Klorida Tambun, Rondang; Limbong, Harry P; Nababan, Panca; Sitorus, Nimrod
Jurnal Kimia dan Kemasan Vol. 37 No. 2 Oktober 2015
Publisher : Balai Besar Kimia dan Kemasan

Daun jambu biji mengandung tanin yang merupakan salah satu inhibitor yang dapat digunakan untuk memproteksi logam dari korosi. Penelitian ini bertujuan untuk mengetahui pengaruh tanin, ekstrak pekat, dan serbuk daun jambu biji terhadap laju korosi pada plat besi yang direndam dalam larutan asam klorida (HCl) 2N. Parameter yang diteliti adalah laju korosi besi dan efisiensi inhibisi. Pada penelitian ini, laju korosi terendah dan efisiensi inhibisi tertinggi diperoleh pada perendaman besi selama 12 hari di dalam larutan HCl dan penambahan 9 g inhibitor. Pada kondisi ini, laju korosi yang dicapai adalah 0,000079 g/cm2.hari dengan menggunakan inhibitor tanin daun jambu biji, 0,000119 g/cm2.hari dengan menggunakan ekstrak pekat daun jambu biji, dan 0,000197 g/cm2.hari dengan menggunakan inhibitor serbuk daun jambu biji. Efisiensi inhibisi yang dicapai pada kondisi ini adalah sebesar 96 % dengan menggunakan inhibitor tanin daun jambu biji, 93,98 % dengan menggunakan inhibitor ekstrak pekat daun jambu biji, dan 90,05 % dengan menggunakan inhibitor serbuk daun jambu biji. Hasil yang diperoleh pada penelitian ini menunjukkan bahwa tanin, ekstrak pekat dan serbuk daun jambu biji memiliki kinerja inhibisi korosi yang baik.

BIOFUEL PRODUCTION FROM PALM OLEIN BY CATALYTIC CRACKING PROCESS USING ZSM-5 CATALYST Tambun, Rondang; Gusti, Oktris Novali; Nasution, Muhammad Anshori; Saptawaldi, Rangga Pramana
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.8733

The depletion of fossil energy reserves raises the potential in the development of renewable fuels from vegetable oils. Indonesia is the largest palm oil producer in the world, where palm oil can be converted into biofuels such as biogasoline, kerosene and biodiesel. These biofuels are environmentally friendly and free of the content of nitrogen and sulfur through catalytic cracking process. In this research, palm olein is used as feedstock using catalytic cracking process. ZSM-5 is used as a catalyst, which has a surface area of 425 m2/g and Si/Al ratio of 50. Variables varied are the operating temperature of 375 oC - 450 Â°C and reaction time of 60 minutes - 150 minutes. The result shows that the highest yield of liquid product is 84.82%. This yield is obtained at a temperature of 400 Â°C and reaction time of 120 minutes. The yield of the liquid product in the operating conditions consisting of C6-C12 amounted to 19.47 %, C14-C16 amounted to 16.56 % and the C18-C28 amounted to 48.80 %.

Kemampuan Daun Jambu Biji sebagai Inhibitor Korosi Besi pada Medium Asam Klorida Rondang Tambun; Harry P Limbong; Panca Nababan; Nimrod Sitorus
Jurnal Kimia dan Kemasan Vol. 37 No. 2 Oktober 2015
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v37i2.1815

Daun jambu biji mengandung tanin yang merupakan salah satu inhibitor yang dapat digunakan untuk memproteksi logam dari korosi. Penelitian ini bertujuan untuk mengetahui pengaruh tanin, ekstrak pekat, dan serbuk daun jambu biji terhadap laju korosi pada plat besi yang direndam dalam larutan asam klorida (HCl) 2N. Parameter yang diteliti adalah laju korosi besi dan efisiensi inhibisi. Pada penelitian ini, laju korosi terendah dan efisiensi inhibisi tertinggi diperoleh pada perendaman besi selama 12 hari di dalam larutan HCl dan penambahan 9 g inhibitor. Pada kondisi ini, laju korosi yang dicapai adalah 0,000079 g/cm2.hari dengan menggunakan inhibitor tanin daun jambu biji, 0,000119 g/cm2.hari dengan menggunakan ekstrak pekat daun jambu biji, dan 0,000197 g/cm2.hari dengan menggunakan inhibitor serbuk daun jambu biji. Efisiensi inhibisi yang dicapai pada kondisi ini adalah sebesar 96 % dengan menggunakan inhibitor tanin daun jambu biji, 93,98 % dengan menggunakan inhibitor ekstrak pekat daun jambu biji, dan 90,05 % dengan menggunakan inhibitor serbuk daun jambu biji. Hasil yang diperoleh pada penelitian ini menunjukkan bahwa tanin, ekstrak pekat dan serbuk daun jambu biji memiliki kinerja inhibisi korosi yang baik.

PENGARUH KONSENTRASI KATALIS ASAM SULFAT DAN WAKTU REAKSI PADA PEMBUATAN BIODIESEL DARI ASAM LEMAK KELAPA SAWIT Rondang Tambun; Anggara Dwita Burmana; Vikram Alexander
AGROINTEK Vol 15, No 1 (2021)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v15i1.8025

This study aims to determine the amount of catalyst and the best reaction time in making biodiesel (methyl ester) from palm fatty acids. The esterification reaction is carried out at 65 oC by using sulphuric acid (H2SO4) as a catalyst. The catalysts used varies from 5 %, 10 %, 15 %, and 20 % to the amount of fatty acid, while the acid value is measured at the reaction time of 60 minutes, 75 minutes, 90 minutes, 105 minutes, and 120 minutes. The molar ratio of methanol and fatty acid varies from 5:1, 6:1, and 7:1. The results obtained show that the acid value increases rapidly from the reaction time of 60 minutes to the reaction time of 105 minutes, and does not increase significantly from the reaction time of 105 minutes to the reaction time of 120 minutes. Based on the acid value obtained, the highest conversion of fatty acids to biodiesel is 97.1250%. This result is obtained at a reaction time of 120 minutes, the amount of catalyst 20 % of the amount of fatty acid, and the molar ratio of methanol and fatty acids 7:1, but this result is almost the same as the conversion of fatty acids at the reaction time of 105 minutes with the same amount of catalyst and molar ratio, that is 96.9286%.

Kemampuan Daun Jambu Biji sebagai Inhibitor Korosi Besi pada Medium Asam Klorida Rondang Tambun; Harry P Limbong; Panca Nababan; Nimrod Sitorus
Jurnal Kimia dan Kemasan Vol. 37 No. 2 Oktober 2015
Publisher : Balai Besar Kimia dan Kemasan

Daun jambu biji mengandung tanin yang merupakan salah satu inhibitor yang dapat digunakan untuk memproteksi logam dari korosi. Penelitian ini bertujuan untuk mengetahui pengaruh tanin, ekstrak pekat, dan serbuk daun jambu biji terhadap laju korosi pada plat besi yang direndam dalam larutan asam klorida (HCl) 2N. Parameter yang diteliti adalah laju korosi besi dan efisiensi inhibisi. Pada penelitian ini, laju korosi terendah dan efisiensi inhibisi tertinggi diperoleh pada perendaman besi selama 12 hari di dalam larutan HCl dan penambahan 9 g inhibitor. Pada kondisi ini, laju korosi yang dicapai adalah 0,000079 g/cm2.hari dengan menggunakan inhibitor tanin daun jambu biji, 0,000119 g/cm2.hari dengan menggunakan ekstrak pekat daun jambu biji, dan 0,000197 g/cm2.hari dengan menggunakan inhibitor serbuk daun jambu biji. Efisiensi inhibisi yang dicapai pada kondisi ini adalah sebesar 96 % dengan menggunakan inhibitor tanin daun jambu biji, 93,98 % dengan menggunakan inhibitor ekstrak pekat daun jambu biji, dan 90,05 % dengan menggunakan inhibitor serbuk daun jambu biji. Hasil yang diperoleh pada penelitian ini menunjukkan bahwa tanin, ekstrak pekat dan serbuk daun jambu biji memiliki kinerja inhibisi korosi yang baik.

PEMBUATAN SIRUP GLUKOSA DARI KULIT PISANG KEPOK (Musa acuminatabalbisianacolla) SECARA ENZIMATIS Zulqarnain Albaasith, Rahmad Nauli Lubis, Rondang Tambun
Jurnal Teknik Kimia USU Vol 3, No 2 (2014)
Publisher : Universitas Sumatera Utara

Glucose syrup is a trade name of hydrolysis of starch solution. The purpose of this research is to produce glucose syrup from banana peel and examine the variables that affect the hydrolysis process. The process of making glucose syrup in this study through a series of treatment until the resulting slurry is ready to be processed banana peel. Hydrolysis process is then performed using α-amylase and glucoamylase enzyme. This process is carried out in four phases: liquefaction, saccharification, purification and concentration. In the liquefaction process to vary the weight of raw materials: water (10% w / v, 20% w / v, 30% w / v and 40% w / v) and heating temperature (60oC, 70oC, 80oC and 90oC). In this research shows that the best glucose syrup is in the variation of glucose syrup raw materials: water 10% w / v at a temperature of 90oC which produces reducing sugar 9.86% and 98.56% DE value. Keywords : starch, enzyme, glucose syrup

PENENTUAN DISTRIBUSI UKURAN PARTIKEL TEPUNG TERIGU DENGAN MENGGUNAKAN METODE PENGAPUNGAN BATANG (BUOYANCY WEIGHING-BAR METHOD) Rondang Tambun; Nofriko Pratama; Ely; Farida Hanum
Jurnal Teknik Kimia USU Vol. 4 No. 1 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Particle size measurement of wheat flour is important in wheat flour industry. There are several methods have been used to measure particle size distribution (PSD) of wheat flour, such as Andreasen pipette method, sedimentation balance method, centrifugal sedimentation method. The disadvantages of these methods are that they are time consuming and require special skills. On the other hand, PSD can be analyzed using a different principle through laser diffraction/scattering methods, and coulter counter method. The laser diffraction/scattering and coulter counter methods produce highly accurate results within a shorter time, but the equipment is extremely expensive. Therefore, a simple and cost-effective new method to determine PSD is in high demand. In this study, we aim to develop a new method to measure the particle size distribution of wheat flour using a buoyancy weighing–bar method. In this method, the density change in a suspension due to particle migration (wheat flour) is measured by weighing buoyancy against a weighing–bar hung in the suspension (etanol/metanol), and the PSD is calculated using the length of the bar and the time–course change in the mass of the bar. This apparatus consists of an analytical balance with a hook for underfloor weighing, and a weighing–bar, which is used to detect the density change in suspension. The result obtained show that the PSD of wheat flour measured by the buoyancy weighing-bar method is comparable to that determined by settling balance method.

APLIKASI ELEKTROKOAGULASI DALAM PENGOLAHAN LIMBAH CAIR PABRIK KELAPA SAWIT Farida Hanum; Rondang Tambun; M. Yusuf Ritonga; William Wardhana Kasim
Jurnal Teknik Kimia USU Vol. 4 No. 4 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The production of crude palm oil (CPO) in Indonesia is keep increasing that make the amount of wastewater generated. Technology of anaerobic fixed bed (RANUT) have been developed, but the characteristic of the wastewater effluent of RANUT has not meet the quality standard that required by the goverment especially for COD. Because of that need to make a furhter research about the treatment of palm oil mill from the fixed bed reactor (RANUT) with electrocoagulation technique. Electrocoagulation is a process of coagulation by using a direct current through an electrochemical events are symptoms of electrolyte decomposition. This study aims to determine the effect of voltage on the adapter parameters on the performance of the electrocoagulation system and determine the best time for treatment of palm oil mill effluent. Type of electrode material used is aluminum, waste retention time 1 hour, 5 cm distance between the electrodes, a strong current of 5 amperes, voltage variations adapter 3, 4, and 5 volts. The results showed that the best results are obtained at a voltage of 5 volts for COD removal 81.32% with a value 233.5 mg/l at 180 minutes of processing time, it indicates that the processed waste has met quality standards for mill effluent COD is 350 mg/l. The highest turbidity removal percentage is obtained at a voltage of 5 volts and at a time of 180 minutes with the acquisition of 95.08%.

PENGARUH WAKTU DAN SUHU PEMBAKARAN DALAM PEMBUATAN ABU DARI KULIT BUAH MARKISA SEBAGAI SUMBER ALKALI Hari Surya Purnama; Herbert; Rondang Tambun
Jurnal Teknik Kimia USU Vol. 4 No. 4 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this study was to determine the optimum of combustion time and temperature of ash production from purple passion fruit peel (Parcilora idollis Sims f edulis Deg.). The experiment was begun to dry passion fruit peel, then combustion to obtaine the ash from passion fruit peel. The combustion was done by muffle furnace which time variables were from 1, 2, 3, 4, 5 hours and burning temperature variables were from 400 oC, 500 oC, 600 oC, 700 oC. The potassium that contained in ash have been extracted by distilled water with volume comparison was 1 : 10 for 24 hours. Observed responses were ash content, normality, pH, conductivity and potassium oxide content (% K2O). The best result of ash was in 5 hours with temperature 500 oC. The ash was analyzed by using AAS Atomic Absorption Spectroscopy, and 39,95 % of potassium oxide (K2O) content was obtained as maximum result.

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