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All Journal Jurnal Teknik Kimia USU

Mersi Suriani Sinaga

Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara

Author-ID : 4065551

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH PELARUT KLOROFORM DALAM PEMURNIAN GLISEROL DENGAN PROSES ASIDIFIKASI ASAM KLORIDA Windi Monica Surbakti; Gerson Rico M.H; Mersi Suriani Sinaga
Jurnal Teknik Kimia USU Vol. 5 No. 3 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Glycerol as a byproduct of biodiesel production was approximately formed 10% of the biodiesel weight. Impurities which contained in the glycerol such as catalyst, soap, methanol, water, salt, and matter organic non glycerol (MONG) have a significant effect on the glycerol concentration. So, it is necessary to treat the impurities. The purpose of this study is to know the effect of chloroform to glycerol purification process with acidification method using hydrochloric acid as pretreatment process. This research was begun with acid addition to the glycerol to neutralize the base content and to split the soap content into free fatty acid and salt, that are more easily separated from glycerol. Then the process was continued with extraction by the solvent chloroform using the variable of test volume ratio (v/v) (1:1, 1:1.5, 1:2) and the extraction time (20, 40, and 60 minutes). The results showed that the more volume of solvent used, gave less extraction time to produce high purity of glycerol. The highest purity produced in this study amounted to 90,9082% is obtained at the ratio of the volume solvent (v/v) 1:1 with extraction time 60 minutes.

PEMANFAATAN EKSTRAK DAUN SAMBUNG NYAWA (Gynura Procumbens [Lour].Merr) SEBAGAI ANTIOKSIDAN PADA MINYAK KELAPA MENGGUNAKAN PELARUT METANOL Mersi Suriani Sinaga; Putri Defriska Siagian; Rika Ariska
Jurnal Teknik Kimia USU Vol. 6 No. 2 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Sambung Nyawa leaves (Gynura Procumbens [Lour].Merr) have been used as a traditional medicine. Sambung Nyawa leaves contain flavonoid compounds, its functional as a natural antioxidant. The aim of this study was to analyze the effect of Sambung Nyawa leaves extract addition as an antioxidant and ability to preserve the quality of coconut oil. Firstly, flavonoids were extracted from Sambung Nyawa leaves with combination of raw material to solvent ratio (w/v) and extraction temperature. The extracts which gave the highest total flavonoids contents were mixed into the coconut oil for 3 days, 6 days, 9 days, 12 days, and 15 days. Total flavonoids contents of Sambung Nyawa leaves extracts were analyzed by UV-Vis spectrophotometry. The analyses for coconut oil were the value of acid, iod, and peroxide number. The results showed that the highest total flavonoids contents of 1,32 % be obtained with raw material to solvent ratio of 1:10 (w/v) and extraction temperature of 55 oC. The lowest acid number of 0.45%, the highest iod number of 7.90 gr I2/100 gr, and the lowest peroxide number of 4.40 mg O2/100 gr be obtained with stored time of 3 days for coconut oil which mixed with the Sambung Nyawa leaves extracts.

PENGARUH MASSA KATALIS DAN WAKTU REAKSI PADA PEMBUATAN BIODIESEL DARI LIMBAH MINYAK JELANTAH DENGAN MENGGUNAKAN KATALIS HETEROGEN K2O DARI LIMBAH KULIT KAKAO Jefry R Turnip; Trio F. L. Tarigan; Mersi Suriani Sinaga
Jurnal Teknik Kimia USU Vol. 6 No. 2 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Waste cooking oil is a waste oil that comes from many types of cooking oils such as corn oil, vegetable oil, ect. The purpose of this research is to waste cooking oil as a raw material to form biodiesel with K2O as the solid catalyst from cocoa pod ash (CPA) which is calcined on temperature 650 oC within 4 hours. This oil contains a high level of Free Fatty Acid (FFA) that is 3.13%. Therefore, pretreatment should be done by using activated carbon (1% w/w) to reduce levels of FFA. The research will be observed the effect of reaction time and the mass of catalyst. The characteristics of biodiesel is analyzed according to the levels of methyl ester in biodiesel, density, and viscosity based on the Indonesian National Standard (SNI). The best conditions of biodiesel are obtained with the amount of catalyst is 6% (w/w) that is calcined at 650 °C, reaction time 180 minutes, ratio mol of alcohol : oil is 12: 1, and 65 oC reaction of temperature, resulting the purity and yield of biodiesel is 99,8% and 92,68%. The results of this research indicates that the use of waste cooking as a raw material is suitable in the manufacture of biodiesel.

PENGARUH KONSENTRASI KATALIS DAN WAKTU REAKSI PADA PEMBUATAN EPOKSI MINYAK GORENG BEKAS Yenni Listiana; Hilde Rosa Tampubolon; Mersi Suriani Sinaga
Jurnal Teknik Kimia USU Vol. 6 No. 3 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Epoxy is produced from an epoxidation of vegetable oil or natural oil with au nsaturated bond. Epoxy can be applied as a stabilizer, plasticizers in polyvinyl chloride (PVC) and can be used as an antioxidant in natural rubber processing, as a surfactant, anti-corrosive additive agent in lubricants and pesticide raw materials. The purpose of this research was to evaluate epoxy production from waste cooking oil. In this research, waste cooking oil was reacted with hexane as solvent, sulfuric acid as catalyst, glacial acetic acid and hydrogen peroxide. The catalyst concentration was varied from 1.5%, 2.1%, 2.5%, 3.1% and 3.5% and the epoxidation time was varied from 60, 120, 180, 240 and 300 min. The results showed that highest epoxy yield was achieved at reaction time of 300 min and 1.5% catalyst. At that condition, the iod number was 0,96 g I2/100 g WCO, oxirane oxygen content was 1.872 and oxirane oxygen conversion was 62.259%.

Co-Authors Gerson Rico M.H Hilde Rosa Tampubolon Jefry R Turnip Putri Defriska Siagian Rika Ariska Trio F. L. Tarigan Windi Monica Surbakti Yenni Listiana

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