Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

CHEMICA Jurnal Teknik Kimia

CHEMICA
Website

Published by Universitas Ahmad Dahlan

ISSN : 2355875X EISSN : 23558776 DOI : 10.26555

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Energy

CHEMICA Jurnal Teknik Kimia ISSN, 2355-875X (print) 2355-8776 (online) is a journal that publishes manuscripts or scientific papers in Chemical Engineering. The scope of this journal covers chemical reaction techniques, separation, optimization, process control, process system engineering, waste treatment, food and material technology. Journals are published in print and online twice a year, in June and December by Chemical Engineering Program, Faculty of Industrial Technology, Universitas Ahmad Dahlan Yogyakarta.

Arjuna Subject : -

Articles 189 Documents

7 8 9 10 11

Kombinasi Proses Filtrasi dan Ion Exchange Secara Kontinu pada Pembuatan Aquadm (Demineralized Water) Reni Desmiarti
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Demineralized water is water free of dissolved mineral. Combination of filtration and ion exchanger processes were studied to treat demineralized water. The source of raw water is from Mountain Talang in District Solok. The study was conducted to investigate the effect of the amount of resin cartridge to electric conductivity (EC), pH and total dissolved solid (TDS).Â The flow rate was set at 50 ml/menit. The results showed that the number of resin cartridge 4 (2 anion and cation 2), the removal efficiency of EC and TDS achieved at 89.09% and 90.91%, respectively. As for the number of cartridges 6 (3 anions and cations 3), the removal efficiency of EC and TDS obtained at 95.45% and 96.36%, respectively.Â In addition, the effect of flow rate was also studied using cartridges resin 6 (3 anions and cations 3). Demineralized water has met the quality standard with a value of 0 ppm TDS, EC 0 Î¼S / cm, pH 7.5. This studies shown that the combination of filtration and ion exchange filtration process can use effectively to treat demineralized water with high quality standard.

Pembuatan Kolom Monolit Mixed-Mode untuk Pemisahan Fenol dalam Kromatografi Cair Sistem Kapiler Aster Rahayu; Joni Aldilla Fajri; Lee Wah Lim; Toyohide Takeuchi
CHEMICA: Jurnal Teknik Kimia Vol 5, No 2 (2018): Desember 2018
Publisher : Universitas Ahmad Dahlan

A Mixed-Mode monolithic column prepared from Pentaeritrytol Tetraacrylate (PETRA) and Ethylene dimathacrylate (EDMA) was investigated and used in capillary liquid chromatography. The polymer composition was optimized by varying percentage ratio of monomer and porogens. Column A with rasio 35/65 (monomer/porogen) showed the optimum ratio. The polymerization of acrylic groups were conducted by in-situ preparation in capillary fused silica. Three phenol compounds were separated using this monolithic column using acetonitrile 100% as eluent. Monolith PETRA-EDMA also could work to separate polar and non-polar compound simultaneously by HILIC mode using acetonitrile 90% as eluent. The morphology surface of monolith was observed by scanning electron microscope (SEM) and mechanical stability in term of pressure drop was observed as well.

Karakteristik Torrefaksi dan Densifikasi Limbah Tandan Kosong Kelapa Sawit Maryudi Maryudi
CHEMICA: Jurnal Teknik Kimia Vol 1, No 2 (2014): Desember 2014
Publisher : Universitas Ahmad Dahlan

Energy demand increases continuously due to the growth of industries. Most industries still rely on fossil fuel and its price commonly increases and the deposit in the universe decreases since it is not a renewable resource. Indonesia is the largest palm oil producer in the world that has potential abundance biomass of empty fruit bunch (EFB) of oil palm. It can be an alternative energy source. The EFB is commonly used as fuel for the heat source of boiler in the palm oil plant. Most applications were by conventional combustion process that has the disadvantage of low energy value. The EFB was only chopped and grinded, and then dried prior to the combustion process. This study investigates the improvement of energy quality of EFB through torrefaction (or light pyrolysis) and the densification process. The EFB was chopped in small size and grinded in the form of fiber, then dried. The EFB fiber in small slices was pressed in a small steel tube and heated in the range of 200-300 °C. The variables of the study were the duration and temperature of the process. The initial heat value of EFB was 18,241 MJ/kg that slightly lower than its kernel shell heat value of 19,955 MJ/kg. The water content was found at 6.28% and 4.31% for EFB and kernel shell respectively. Results have shown that torrefaction and densification have improved the calorific value of EFB in the range of 6.58-16.71% of its initial value. On the other hand, the energy yield has decreased to 97.54, 97.26, and 93.76% of its initial energy yield for torrefaction temperature of 200, 250, and 300 °C respectively.

Study of thermal degradation of biomass wastes generated from palm oil milling plant Nugroho Dewayanto; Anisa Najwa Azman; Nur Atiqah Ahmad; Mohammad Shahrul Harris Mohd Shah
CHEMICA: Jurnal Teknik Kimia Vol 3, No 2 (2016): Desember 2016
Publisher : Universitas Ahmad Dahlan

Thermal decomposition of empty fruit bunch (EFB), palm kernel shell (PKS) and palm oil milling effluent sludge (POMES) have been investigated. Thermogravimetry analysis was employed to determine the proximate analysis of the samples, and then to study the characteristic of the thermal degradation. Proximate analysis of the sample was conducted by introduce the samples into the TGA and run it under the nitrogen environment from 25 to 800 Â°C. The gas was shifted to oxygen to let the sample burn and left their ash. Thermal degradation studies were carried out by heating up the samples in TGA from 25 to 800 Â°C at different heating ratio. Second order kinetic model was applied to determine the characteristic of the degradation.Â

Pengaruh Total Solid dan Perbandingan Bahan Baku dengan Inokulum terhadap Produksi Biogas dari Jerami Jagung Gita Indah Budiarti; Lukhi Mulia Shytophyta; Dika Fajariyanto; Yusuf Eko Nugroho
CHEMICA: Jurnal Teknik Kimia Vol 5, No 1 (2018): Juni 2018
Publisher : Universitas Ahmad Dahlan

The effect of total solid (TS) content and feedstock/inoculum (F/I) ratioÂ on biogas production from corn stover by solidâ€state anaerobic digestion (SSâ€AD) were studied. At a F/I ratio of 2, conversion of corn stover under room temperature resulting in higher biogas yield. SSâ€AD performed as expected at the TS content of 20%, 22%, 24%. The highest biogas yield of 200 L kgâ€1 volatile solids (VS) was obtained at TS content of 22%, F/I ratio of 2.

Pemanfaatan limbah Tandan kosong kelapa Sawit Sebagai Bahan Baku Pembuatan Glukosa Heri Pranoto
CHEMICA: Jurnal Teknik Kimia Vol 3, No 1 (2016): Juni 2016
Publisher : Universitas Ahmad Dahlan

AbstractThe use of increase in plantation and production of crude palm oil (CPO), will be the more industrial waste generated. Based on statistics book published by DG oil palm plantations, the 2004 acreage of palm oil is 5.2 million hectares and in 2014 had reached 10.9 million hectares with a production of 29.3 million tons of CPO. One of the biggest wastes from palm oil mill is empty fruit bunches (EFB). During the utilization of empty fruit bunches just as boiler fuel, compost and as pavers in oil palm plantations. Though EFB potential to be developed into a more useful. One of them as raw material for making glucose. The process of creating glucose from empty fruit bunches, starts from the beginning that process of delignification treatment with NaOH solution of 17.5% followed by the hydrolysis using cellulase enzymes. The testing process on the study include is kappa test, lignin, cellulose and glucose test (through enzymatic hydrolysis process). The highest glucose obtained from the hydrolysis of the pH variation is at pH 5 and hydrolysis time 28hour with levels of 1.2% and for the greatest levels of temperature variation obtained at a temperature of 35 Â° C time hidolisis 28 hour with glucose levels of 1.2272% of each of dry weight (EFB).Keywords: Glucose; hydrolysis; EFB

Aplikasi Filler Batang Sorgum pada Sintesis Bioplastik dengan Plasticizer Asam Palmitat Yuli Darni; Dita Synthauli E; Erna Sartika Sinambela; Herti Utami
CHEMICA: Jurnal Teknik Kimia Vol 4, No 2 (2017): Desember 2017
Publisher : Universitas Ahmad Dahlan

Plastics are used for human use, creating side effects on the environment. The low level of degradation in the plastic makes the environment must accommodate so much plastic waste that causes pollution so that innovation is needed in the manufacture of plastics that can decompose in nature. This study discusses the use of sorghum stalk as a filler in the manufacture of bioplastic. Sorghum starch and chitosan as a bioplastic raw material with a palmitic acid and PEG-400 as a plasticizer. The purpose of this study was determined the effect of sorghum stalk as a filler (packing material) into mechanical properties of bioplastic. Bioplastic produced is expected to resemble a commercial LDPE plastic. Starch-chitosan formulations used in this study was 63 : 35 (w/w), the size of the starch and chitosan was 63 micron sieve, stirring time about 35 minutes and stirring velocity about 375 rpm this research was also conducted various concentration of plasticizer (10,15, 23, 27, 33, 35 wt%). Some analysis of the mechanical test (tensile strength, percent elongation, and modulus young), water resistance, density and FTIR has determined the characteristics of bioplastic. The best result in this research is bioplastic with 1 gr filler formulation at 10% plasticizer concentration with modulus young value characteristic aboutÂ 126,145 MPa, the tensile strength of 7,028 MPa, extension percent about 5,517 %, density about 0,9 gr/mL, the water absorption of 38,88%. The bioplastic characteristic already meet the LDPE plastic standard.

EKSTRAKSI ABU KAYU DENGAN PELARUT AIR MENGGUNAKAN SISTEM BERTAHAP BANYAK BERALIRAN SILANG Imam Santosa; Endah Sulistiawati
CHEMICA: Jurnal Teknik Kimia Vol 1, No 1 (2014): Juni 2014
Publisher : Universitas Ahmad Dahlan

As an agricultural country, Indonesia has natural resources are very abundant, one of which is wood. Wood ash from household and industrial waste has not been used, whereas according to Pitman high potassium content. The solubility of potassium carbonate in high water, so effective when extracted with water. However, high humidity in Indonesia drying wood for fuel so low that allegedly affect the quality of the ash obtained. In this research, the extraction of wood ashes with water using a solvent system gradually many wing cross.The experimental study was conducted in a laboratory of Universitas Ahmad Dahlan, Yogyakarta. The procedure used is the extraction of wood ash 200, 300, and 400 grams with 1000 ml of solvent water for 5 minutes using a glass beaker, filtering with the aid of a vacuum pump, and acidi alkalimetri analysis using 0.1 N HCl residual solids by filtration and then in water contacted again and so do the same thing 5 times. Raw materials are derived from wood ash combustion for drying of the wood cutting industry and water used in the form aquadestilata.Extract wood ash derived from the combustion for drying small normality sawmill industry. The results of the analysis can be made curve that describes the operating line and curve logarithmic form of the equation of equilibrium in the form of linear equations. Moreover, it can be made a graph illustrating a series of 5 stages of operation which is a combination of single phased extraction.

Biodiesel dari Limbah Pabrik Gula dan Minyak Jarak Pagar (Jatropha curcas) dengan Katalisator Zeolit Alam Klinoptilolite Ratna Sri Harjanti; Anugrah Perdana Rahmanta
CHEMICA: Jurnal Teknik Kimia Vol 2, No 2 (2015): Desember 2015
Publisher : Universitas Ahmad Dahlan

The fuel price increase with the increase of the number of transportation due to the increasing numbers of the population. Indonesia with more than 200 million people in need of transportation fuels in the form of gasoline and diesel in large quantities. Currently the main source of transportation fuels derived from petroleum. Premium production in Indonesia is about 62 million barrels and production of about 87 million barrels of diesel fuel. The product does not include the use for other needs, such as lubricating oil, kerosene, avgas, as well as other materials. This is particularly worrying given the oil reserves are dwindling. One of the alternative energy for transportation fuels is biodiesel as a substitute for diesel fuel.The castor oil has potential to be used as biodiesel. Fusel oil is a sugar mill waste containing alcohol. The reaction between castor oil and fusel oil with natural zeolite catalyst klinoptilolite be referred to as alcoholysis reactions that produce esters. Castor oil and fusel oil mixed with zeolite powder klinoptilolite that previously had been heated in a separate place until it reached its boiling temperature. Three neck flask fitted with a thermometer, hoses trailer makers, heater, and the agitator on 100 rpm with 100 oC of temperature. Snapshot taken at intervals of 30 minutes each. Conversion reaction calculated by analyzing the levels of glycerol bottom layer by means asetin. Alcoholysis fusel oil and castor oil with natural zeolite catalyst klinoptilolite produce esters that are approaching the properties of diesel oil with a calorific value of 19 119 Btu/lb. Optimum conversion of 57 % was obtained in alcohol - oil ratio of 9.29 mgek/mgek and the addition of a catalyst as much as 2.56% of the weight of oil.

Pengolahan Limbah Minyak Pelumas dengan Menggunakan Metode Elektrokoagulasi Lailan Ni'mah; Fauzan Fyanidah; Muhammad Danan Maulana
CHEMICA: Jurnal Teknik Kimia Vol 4, No 1 (2017): Juni 2017
Publisher : Universitas Ahmad Dahlan

Most of users of lubricants are motor vehicles plus lubricating oil used for factory machinery. The amount of lubricating oil used will produce waste. Waste generated by the lubricant is included in the B3 waste which needs special handling. In this study used electrocoagulation because this method is easy and not too dangerous because there is no addition of chemicals. The objective of this study was to study electrocoagulation method using aluminum and steinless steel electrodes and the effect of time to decrease of Fe metal content. This electrocoagulation treats lubricating oil waste electrically so that the ions present in the waste are absorbed by the binding coagulant that is released electrode so that there will be bonds between metal ions with coagulant. The first reactor penetration procedure is filled with a lubricating oil waste containing Fe up to 1000mL. The anode (aluminum) is connected to the positive pole, whereas the cathode (stainless steel) is connected to the negative pole of the current rectifier (adapter). Voltage variations used are 12 volts, 18 volts and 24 volts and 5A current strength with stirring duration of each variation for 2 hours, 2.5 hours and 3 hours. Electrocoagulation result with 24 volt voltage with time of 3 hours for big plate is 26,44 is decrease of Fe content of biggest metal.

Page 9 of 19 | Total Record : 189

7 8 9 10 11

Filter by Year

2014 2023

Filter By Issues

All Issue Vol. 10 No. 3 (2023): December 2023 [Available online since December 26, 2023] Vol. 10 No. 2 (2023): August 2023 [Available online since October 02, 2023] Vol 10, No 2 (2023): August 2023 Vol 10, No 1 (2023): April 2023 Vol 9, No 3 (2022): December 2022 Vol 9, No 2 (2022): August 2022 Vol 9, No 1 (2022): April 2022 Vol 8, No 2 (2021): December 2021 Vol 8, No 1 (2021): June 2021 Vol 7, No 2 (2020): Desember 2020 Vol 7, No 1 (2020): June 2020 Vol 7, No 1 (2020): Juni 2020 Vol 6, No 2 (2019): Desember 2019 Vol 6, No 1 (2019): Juni 2019 Vol 5, No 2 (2018): Desember 2018 Vol 5, No 1 (2018): Juni 2018 Vol 5, No 1 (2018): Juni 2018 Vol 4, No 2 (2017): Desember 2017 Vol 4, No 2 (2017): Desember 2017 Vol 4, No 1 (2017): Juni 2017 Vol 4, No 1 (2017): Juni 2017 Vol 3, No 2 (2016): Desember 2016 Vol 3, No 2 (2016): Desember 2016 Vol 3, No 1 (2016): Juni 2016 Vol 3, No 1 (2016): Juni 2016 Vol 2, No 1 (2015): Juni 2015 Vol 2, No 2 (2015): Desember 2015 Vol 2, No 2 (2015): Desember 2015 Vol 2, No 1 (2015): Juni 2015 Vol 1, No 2 (2014): Desember 2014 Vol 1, No 2 (2014): Desember 2014 Vol 1, No 1 (2014): Juni 2014 Vol 1, No 1 (2014): Juni 2014 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Agus Aktawan

Contact Email
agus.aktawan@che.uad.ac.id

Phone
-

Journal Mail Official
chemica@che.uad.ac.id

Editorial Address
-

Location
Kota yogyakarta,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Agus Aktawan

Contact Email agus.aktawan@che.uad.ac.id

Phone -

Journal Mail Official chemica@che.uad.ac.id

Editorial Address -

Location Kota yogyakarta, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Agus Aktawan

Contact Email
agus.aktawan@che.uad.ac.id

Phone
-

Journal Mail Official
chemica@che.uad.ac.id

Editorial Address
-

Location
Kota yogyakarta,

Daerah istimewa yogyakarta

INDONESIA