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Herling D. Tangkuman
Universitas Sam Ratulangi
Chemistry

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PRODUKSI BIOETANOL DARI NIRA AREN MENGGUNAKAN ENERGI GEOTHERMAL Tangkuman, Herling D.; Rorong, Johnly A.; Pandara, Dolfie; Tamuntuan, Gerald
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.69

Abstract

The results obtained as follows: 400 L didestilasi fermented sap fractionation and at a temperature of 82 °Cdestilat began to drip. At the end of the distillation process, is obtained destilat as much as 86 L 35% ethanol.Then the results obtained diredestilasi returned 36 L 78% ethanol, then the results added lime and then backdidestilasi results obtained is 28 L 96% ethanol. The next Prosess purification with the addition later inanhidrous compounds using zeolite filtration to obtain 99% ethanol. From purified bioethanol chromatogram inFigure 5, shows that the peak that appears only one (single) at the retention time of 3.03 minutes with a 99.5%level. Chromatogram of bioethanol palm juice samples in Figure 5 shows that the peak with retention time of3.02 minutes is the most dominant peak levels of 96.77%. Peak with retention time of 3.02 minutes for thesample destilat similar retention time for bioethanol Purified (3.03 minutes). This shows that the largestcomponent in the sample is ethanol destilat. Peak with retention time 2.45 minutes on the chromatogram image5 (sample bioethanol) with levels of 2.174%, the sample is expected ester compounds. This is supported by theresults of the determination of sample density, higher destilat (0.8288 g/mL) from the weight of pure ethanol(0.79 g/mL). While the results of an infrared spectrophotometer for pure ethanol and the sample obtained asfollows; Based on the spectrum of pure ethanol in Figure 6, shows the existence of prolonged vibration of theOH absorption at 3232.99 cm-1. In the absorption region 2968.71 cm-1 and 2901.11 cm-1 indicate a prolongedvibration of CH of CH2 and CH3. In the absorption region 1450.46 cm-1 showed a prolonged vibration of CH2.Prolonged vibration of the CH3 region is also shown on the uptake 1383.09 cm-1 and 1332.93 cm-1 absorption inthe region 1045.51 cm-1 indicate a prolonged vibration of CO of alcohol.
PERBANDINGAN KUALITAS KARBON AKTIF YANG DIBUAT DARI BATOK KELAPA HIBRIDA DAN BATOK KELAPA DALAM Tangkuman, Herling D.; Aritonang, Henry F.
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.60

Abstract

This research was done to compare carbon quality made from hybrid coconut shell and deep coconut shell using direct process from coconut shell to be active carbon at 800- 1200oC temperature. The results shows that active carbon from deep coconut shell was better compared with hybrid coconut shell. Deep coconut shell has: ash content 2,1, water content 3,9, bonding carbon content 98, Iod absorbed ability 904, CTC 54, good galnular, consecutively and hard, whereas hybrid coconut shell has : ash content 12,4, water content 6,8, bonding carbon content 68, Iod absorbeb ability 482, CTC 28, desultory glanular and brittl
DERAJAT KRISTALISASI SEBAGAI FUNGSI WAKTU AGEING DAN WAKTU KRISTALISASI PADA SINTESIS ZEOLIT A DENGAN RADIASI GELOMBANG MIKRO Wuntu, Audy D.; Tangkuman, Herling D.
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.21

Abstract

A-type zeolite has wide application in the field of catalysis and adsorption in industry and daily use as well. This material in a kind of synthetic material and can be synthesized from various raw materials and using various method, one of which is conventional hydrothermal condition. The use of microwave is one of the methods that can reduce the time needed for A-type zeolite synthesis. In this research, the power of the microwave is set to 720 Watt with ageing time of 0 hour and period of synthesis is set at the range of 0 to 50 minutes. Characterization of the zeolite synthesized using microwave was performed using infra red spectroscopy and the result was compared to that synthesized at conventional hydrothermal condition. The results showed that conventional hydrothermal condition at 0 hour ageing time and 5 hours crystallization period gave zeolite more crystallized than that resulted using microwave. The period of zero to 50 minutes crystallization time at microwave did not result in crystallized zeolite.
REAKSI ESTERIFIKASI GARAM ASAM LEMAK DENGAN ALKIL KLORIDA BERANTAI PANJANG MENGGUNAKAN TRIDODEKILAMIN HIDROKLORIDA SEBAGAI KATALIS PERPINDAHAN DUA FASA Aritonang, Henry F.; Tangkuman, Herling D.
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.59

Abstract

Synthesis of didodekyl azelate produced by estherification reaction of disodium azelate salt with dodecylchloride used tridodecylamine hydrochloride as catalyst of two phase transfer was 34,123 gram (65,11%). Product of ester didodekyl azelate was identified by IR spectrometry which shows strong absorptionat 1700-1600 cm-1 indicating ester group C=O and 1H-NMR spectra showed that the number of protonsester was five lingkungan chemistry yang berbeda.
PENGARUH KONSENTRASI SIANIDA TERHADAP PRODUKSI EMAS Tangkuman, Herling D.; Abidjulu, Jemmy; Mukuan, Hendra
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.22

Abstract

The research has been done to study the effect of cyanide concentration on gold production. There are three step to produced gold. First is repulper, second is leaching and the last is burning. The result show that concentration of cyanide give effect in gold production. Cyanide with 100 ppm significantly different compared with cyanide with 200, 400 and 600 ppm in gold recovery. Based on statistical analysis, cyanide with 400 ppm is the best concentration in gold production.
Co-Authors Audy D. Wuntu Gerald Tamuntuan Hendra Mukuan Henry Aritonang Jemmy Abidjulu Johnly A. Rorong Pandara, Dolfie Paulus