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All Journal Jurnal Rekayasa Proses Reaktor Jurnal Teknik Kimia USU Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan JURNAL INTEGRASI PROSES agriTECH ALCHEMY Jurnal Penelitian Kimia Jurnal Rekayasa Proses ASEAN Journal on Science and Technology for Development Jurnal Inovasi Teknik Kimia ASEAN Journal of Chemical Engineering Equilibrium Journal of Chemical Engineering Jurnal Teknik Kimia USU

Sang Kompiang Wirawan

Chemical Engineering Department, Faculty Of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2, Yogyakarta 55281, Indonesia

Author-ID : 370154

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Social Sciences Other

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Persamaan Empiris Sederhana untuk Memprediksikan Ukuran Partikel dari Enkapsulasi Oleoresin Jahe Merah Jayanudin Jayanudin; Rochmadi Rochmadi; Moh. Fahrurrozi; Sang Kompiang Wirawan
ALCHEMY Jurnal Penelitian Kimia Vol 14, No 2 (2018): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.14.2.17076.178-192

Tujuan penelitian ini adalah menentukan persamaan empiris dari bilangan tak berdimensi untuk memprediksikan ukuran mikrokapsul oleoresin jahe merah. Metode enkapsulasi yang digunakan adalah crosslink emulsi dengan kitosan sebagai penyalut dan glutaraldehyde saturated toluene (GST) sebagai agen crosslink. Oleoresin jahe merah dan kitosan dengan konsentrasi 1, 2, 3 dan 4% (w/v) diaduk dengan kecepatan 10.000 rpm untuk membentuk emulsi, kemudian dimasukan dalam minyak jagung dan diaduk kembali untuk membentuk emulsi kedua. Sebanyak 10 mL glutaraldehyde saturated toluene (GST) sebagai agen crosslink ditambahkan secara bertahap. Setelah itu, ditambahkan larutan glutaraldehida 25% dan terus diaduk selama 2 jam. Mikrokapsul dipisahkan dan dicuci dengan petroleum eter dan heksan, kemudian dikeringkan dalam oven dengan suhu 70 °C. Dengan cara yang sama digunakan untuk membuat mikrokapsul pada kecepatan pengadukan 5.000, 8.000 dan 15.000 rpm. Ukuran diameter mikrokapsul dianalisis menggunakan mikroskop digital. Persamaan empiris dari bilangan tak berdimensi Reynolds (Re) dan Ohnesorge (Oh) dibuat untuk memprediksikan diameter mikrokapsul. Data dari variabel perubahan konsentrasi kitosan dan kecepatan pengadukan dapat menghasilkan persamaan empiris dari bilangan Reynolds (Re) dan Ohnesorge (Oh). Konstanta yang dihasilkan adalah = 422,06, = 0,37 dan = -0,18. Berdasarkan perbandingan antara data diameter penelitian dan hasil perhitungan didapat % kesalahan sebesar 8,05% untuk pengaruh konsentrasi kitosan dan 7,52% untuk pengaruh kecepatan pengadukan.A Simple Empirical Equation for Predicting Particle Size from Encapsulation of Red Ginger Oleoresin. This study aims to determine the empirical equations of the dimensionless number to predict the diameter size of red ginger oleoresin microcapsules. The encapsulation method used is crosslinking emulsion with chitosan as coating and glutaraldehyde saturated toluene (GST) as a crosslinking agent. Red ginger oleoresin and chitosan with concentrations of 1, 2, 3 and 4% (w/v) were stirred at 10,000 rpm to form emulsions, and then added to the corn oil and stirred again to form a second emulsion. The 10 mL of glutaraldehyde saturated toluene (GST) as a crosslinking agent was added gradually. After that, a 25% glutaraldehyde solution was added and stirred for 2 hour. Microcapsules were separated and washed with petroleum ether and hexane, then dried in an oven at a temperature 70 °C. The same step, the microcapsules were made at stirring speed of 5,000; 8,000; and 15,000 rpm. The size of the microcapsule diameter was analyzed using a digital microscope. The empirical equations of the dimensionless numbers Reynolds (Re) and Ohnesorge (Oh) are made to predict the microcapsule diameter. The data from the chitosan concentration change and stirring speeds could produce the empirical equations of the Reynolds and Ohnesorge numbers. The resulting constants were = 422.06, = 0.37 dan = -0.18. By comparing the data diameter of the research and calculation results obtained % error of 8.05% for the influence of chitosan concentration and 7.52% for the effect of stirring speed.

PENGARUH RASIO ISOPROPIL ALKOHOL TERHADAP RECOVERY DAN KARAKTERISTIK SERBUK PEKTIN DARI KULIT KAKAO Venitalitya A. S. Augustia; Dian Ika Nugraha; Sang Kompiang Wirawan
Jurnal Teknik Kimia USU Vol. 7 No. 2 (2018): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Cocoa is a fruit crop which is able to be planted in tropical climate, e.g. Indonesia. Generally, people only take the flesh of cocoa fruit and the peel is removed so that it will increase the volume of waste. The cocoa peel contains useful compounds for food and pharmaceutical industries, such as pectin. Hence, a research to increase the pectin retrieval quality from cocoa peel is needed in order to utilize the useful cocoa waste. Methods used in this research is solid-liquid extraction with water as solvent in the presence of acid (HCl). The process of making pectin powder is done through several steps here: (1) Raw material preparation, (2) Pectin extraction, and (3) Analysis of pectin powder. The extraction process is done at temperature of 70℃ for 90 minutes with the pH of the solvent is 1.5. The variation is done on the ratio of volume of isopropyl alcohol to the retrieved pectin. The result of the research shows that the recovery of pectin is at its peak at 6.50% with the percentage of water at 5,82%, equivalent weight of 6454,5242, metoxyl percentage of 5,76%, galacturonate percentage of 35,45%, and esterification level of 92,31%. The best quality of pectin, determined by the highest value of characterization, is obtained when the ratio of the filtrate to the volume of isopropyl alcohol is 1:1.

Kinetics and Adsorption Equilibrium Study of Free Fatty Acid (FFA) from Crude Palm Oil (CPO) on Anionic Resin Sang Kompiang Wirawan; Daniel Timotius; Ivone Marselina Nugraha; Asdi Restana; Afrizal Luthfi Anggara; Sayoga Hidayatullah
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.70319

Crude Palm Oil (CPO) is obtained from palm fruit extraction. Free Fatty Acid (FFA) level is one of the most important parameters to determine the CPO quality. The standard FFA level in the industry is less than 5%. In the palm oil processing industry, FFA levels in CPO have been minimized through vacuum distillation processes. However, due to the emulsified water in oil and long departure waiting time in port, FFA levels in CPO raise to above 5% resulting in lower quality and selling price. This study has developed a novel approach to mitigate this problem by using anionic resin as an adsorbent to decrease the FFA level. We investigated the kinetics and equilibrium behavior of FFA adsorption in CPO on the anionic resin. The adsorption was conducted in several resin dose (17.5%; 25%; 33.33%; 43%). The kinetic study shows that the FFA adsorption kinetics on anionic resin follows the Pseudo-second-order rate model with the value of k2 vary between 2.1034×10-4 – 1.7375×10-3 and the qe value is in the range of 103.627 - 163.880 (mg/g). The equilibrium study shows that the Freundlich isotherm model is the fittest. The Kf values are obtained between 4.16-15.02, and the n values are in the range of 1.62-2.05. The thermodynamic observation was also involved in this study. The value of and are 28.59 kJ/mol and 91.25 J/mol/K respectively. The results show that the reaction is endothermic, spontaneous, and feasible.

The Development of Lithium Ion Recovery Method by Activated Carbon and Natural Zeolite-based Adsorbent Chandra Wahyu Purnomo; Endhy Kesuma; Sang Kompiang Wirawan; Hirofumi Hinode
ASEAN Journal of Chemical Engineering Vol 17, No 1 (2017)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Coconut shell char and natural zeolite been activated and then tested to separate between lithium and cobalt ions in solutions. The capacity of adsorption and selectivity between the ions were investigated. The longer adsorption time, the capacity was getting better but the selectivity decreased. It was observed that the optimum selectivity was obtained by 3 hours adsorption using activated carbon. The chemical activated sample has superior performance and selectivity compared with physical activation carbons of the same activation temperature. After the adsorption, pure lithium solution can be obtained while the other metal is adsorbed inside the adsorbent

Effect of Ion Exchanged to the CO2 Adsorption on MFI Zeolites Sang Kompiang Wirawan; I Wayan Warmada; Endang Tri Wahyuni
ASEAN Journal of Chemical Engineering Vol 13, No 2 (2013)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

The adsorption of CO2 on MFI (HZSM-5) and ion exchanged MFI (CaZSM-5) zeolites were studied by a temperature programmed desorption (TPD). The adsorption measurements were conducted at temperatures from 323 to 473 K at atmospheric pressure. The results showed that CO2 was adsorbed on HZSM-5 by one type of adsorption, and on CaZSM-5 zeolites by at least two types of adsorption over the temperature range studied. One was a weak adsorption probably due to interaction with the framework of ZSM-5, and the other was a stronger adsorption caused by interactions with the Ca cations of ZSM-5. The adsorption behavior for HZSM-5 was described by a single site Langmuir adsorption model but for CaZSM-5 a dual site Langmuir model was used. The TPD results indicated that the quantity of irreversibly adsorbed CO2 on HZSM-5 was undetectable.

CO2 Selective Water Gas Shift Membrane Reactor : Modeling and Simulation Sang Kompiang Wirawan; Derek Creaser; I Made Bendiyasa; Wahyudi Budi Sediawan
ASEAN Journal of Chemical Engineering Vol 12, No 1 (2012)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

The concept of a CO2 selective water gas shift (WGS) membrane reactor has been modeled and simulated by a one-dimensional reactor and transport process in the membrane. The model was used to investigate the effect of temperature, total pressure, membrane thickness and area on the reactor performance. A Silicalite-1 membrane was considered to be integrated with the WGS reactor. The mass transport through the membrane was described by surface diffusion. Air was used as sweep gas on the permeate side of the membrane. The catalytic WGS kinetics were for a commercial Cu/ZnO catalyst for the lower-temperature WGS reaction. The WGS membrane reactor was sized to produce H2 sufficient for the production of 10 kW electrical power from a fuel cell. The modeling and simulation results showed that the WGS membrane reactor with a silicalite-1 membrane was capable of decreasing the CO concentration to about 675 ppm which is 70% less than that achievable at equilibrium conversion, but it would come at the cost of unacceptable H2 loss. Based on a minimum target of H2 loss, the optimum outlet CO concentration achieved by the silicalite-1 membrane reactor was about 1310 ppm, under a range of limited conditions. The modeling study showed that both the WGS reaction rate and the CO2/H2 selective permeation played an important role on the overall reactor performance.

Adsorption of CO, CO2 and H2 in Silicalite-1: measurements and simulations Sang Kompiang Wirawan; Martin Petersson; Derek Creaser
ASEAN Journal of Chemical Engineering Vol 8, No 1 & 2 (2008)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Single component and mixture adsorption of CO2, CO and H2 in Silicalite-1 was studied with the step response experiments and through molecular simulations. Experiments were performed at 323.15, 373.15 and 473.15 K, and in the pressure range 10.13 to 81.06 kPa. CO2 adsorption was favored over CO during all studied conditions. The adsorption enthalpies were -24.3 and -13.5 kJ/mol for CO2 and CO respectively. Adsorption simulations were performed using the Grand Canonical Monte Carlo method. A new zeolite framework potential was derived, and was shown to give good agreement with the experimental results. The major reason for the higher saturation loading of CO2 compared to CO is however the stronger sorbate-zeolite attraction for CO2. The affinity for CO2 also causes a decrease in the adsorbed molar fraction of CO due to the competition with CO2.

CO2 Adsorption on HZSM-5 Zeolite : Mass Transport Study in A Packed Bed Adsorber Sang Kompiang Wirawan; Ihda Novia Indrajati; Wahyudi Budi Sediawan; Panut Mulyono; Derek Creaser
ASEAN Journal of Chemical Engineering Vol 8, No 1 & 2 (2008)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Experimental and modeling have been done to study and to determine the diffusion parameters of CO2 adsorption on HZSM-5 zeolite in a packedbed adsorber. Experiment works consisted of tracer and adsorption experiments. The feed gas concentrations were 40 and 80% CO2 in helium within various temperatures of 373, 423 and 473 K. The experiments were conducted by using transient step change adsorption. Tracer experiments using 20% Ar/He were conducted to measure dispersion and time lag effect of the packed bed system. A model of CO2 adsorption on HZSM5 had been set up for transient packedbed adsorber by assuming plug flow, isothermal and isobaric, single site Langmuir physisorption, no gas film mass transport resistance and MaxwellStefan mass transport in micropore applied. All the data were then optimized to get the best value of modified fitted parameter. The results indicated that at higher temperature, the quantities of gas adsorbed were decrease. This was due to lower adsorption capacity which occurs at higher temperature. The model was in a good agreement with the experiment data. Diffusivity tended to increase by increasing temperatures.

PENGARUH PLASTICIZER PADA KARAKTERISTIK EDIBLE FILM DARI PEKTIN Sang Kompiang Wirawan; Agus Prasetya; Ernie Ernie
Reaktor Volume 14, Nomor 1, April 2012
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.14.1.61-67

EFFECT OF PLASTICIZER ON THE PECTINIC EDIBLE FILM CHARACTERISTICS. The peel of Balinese Citrus contains high concentration of pectin which can be further processed to be edible films. The edible films can be utilized as a food coating which protects the food from any external mass transports such as humid, oxygen, and soluble material and can be served as a carrier to improve the mehanical-handing properties of the food. Edible films made of organic polymers tend to be brittle and thus addition of a plasticizers is required during the process. The work studies the effect of the type and the concentration of plasticizers on the tensile strength, the elongation of break, and the water vapor permeability of the edible film. Sorbitol and glycerol were used as plasticizers. Albedo from the citrus was hydrolized with hydrochloride acid 0.1 N to get pectinate substance. Pectin was then dissolved in water and mixed with the plasticizers and CaCl2.2H2O solution. The concentrations of the plasticizers were 0, 0.03, 0.05, 0.1, and 0.15 mL/mL of solution. The results showed that increasing the concentration of plasticizers will decrease the tensile strength, but increase the elongation and firlm permeability. Sorbitol-plasticized films are more brittle, however exhibited higher tensile strength and water vapor permeability than glycerol-plasticized film. The resuts suggested that glycerol is better plasticizer than sorbitol. Kulit Jeruk bali banyak mengandung pektin yang dapat dimanfaatkan sebagai bahan baku edible film. Edible filrm bisa digunakan untuk melapisi bahan makanan, melindungi makanan dari transfer massa eksternal seperti kelembaban, oksigen, dan zat terlarut, serta dapat digunakan sebagai carrier untuk meningkatkan penanganan mekanik produk makanan. Film yang terbuat dari bahan polimer organik ini cenderung rapuh sehingga diperlukan penambahan plasticizer. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh kadar dan jenis plasticizer terhadap kuat tarik, persentase elongation dan permeabilitas uap air dari pektin edible film. Plasticizer yang digunakan dalam penelitian ini adalah sorbitol dan gliserol. Serbuk albedo dari kulit jeruk bali dihidrolisis dengan larutan asam klorida 0,1 N untuk mendapatkan pektin. Pektin kemudian dilarutkan dalam air dand icampurkan dengan plasticizer dan larutan CaCl2.2H2O. Kadar plasticizer yang digunakan adalah 0; 0,03; 0,05; 0,10; dan 0,15 mL/mL larutan. Dari hasil penelitian diperoleh bahwa semakin banyak plasticizer yang digunakan akan menurunkan nilai kuat tarik film tetapi menaikkan nilai percent elongation of break dan permeabilitas film. Film dengan plasticizer sorbitol lebih rapuh namun memberikan nilai kuat tarik dan permeabilitas uap air yang lebih tinggi dibandingkan film dengan plasticizer gliserol. Hasil penelitian ini menunjukkan bahwa gliserol merupakan palticizer yang lebih baik.Kata kunci: edible film; pektin; permeabilitas; plasticizers; kuat tarik

KARAKTERISTIK LIMBAH PADAT RUMPUT LAUT PADA INDUSTRI KARAGINAN Wahyu Tri Handoyo; Sang Kompiang Wirawan; Bakti Berlyanto Sedayu; Arif Rahman Hakim
Jurnal Inovasi Teknik Kimia Vol 9, No 4 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i4.11501

Pada proses ekstraksi karaginan berbahan dasar rumput laut Euchumma cottonii hanya menghasilkan produk sekitar 30% dan sisanya menjadi limbah yang belum dimanfaatkan. Berdasarkan beberapa penelitian yang telah dilakukan, limbah tersebut mengandung selulosa, hemiselulosa dan lignin yang dapat dimanfaatkan sebagai bahan bioetanol dan biokomposit. Namun dari beberapa penelitian dilaporkan bahwa kandungan selulosa sangat bervariasi karena dipengaruhi oleh metode ekstraksi, perbedaan bahan baku dan teknik analisis yang digunakan. Penelitian ini bertujuan untuk mengetahui kandungan limbah padat rumput laut pada industri karaginan. Analisis yang dilakukan meliputi analisis kadar air, kadar selulosa, kadar abu, dan thermal gravimetry analysis (TGA). Hasil penelitian menunjukkan bahwa limbah padat memiliki kadar air, kadar selulosa, dan kadar abu berturut-turut yaitu 3 – 6%, 65,28%, dan 83 – 85%. Selain itu hasil TGA menunjukkan sisa massa yang cukup besar yaitu sekitar 86%. Hasil analisis menunjukkan bahwa limbah padat sisa industri karaginan memiliki kandungan selulosa yang relatif tinggi, namun diduga terdapat tanah diatom yang tidak larut ketika analisis.Kata kunci: karaginan, limbah padat, rumput laut, selulosa

Co-Authors Afrizal Luthfi Anggara Agus Prasetya Ari Diana Susanti Arif Rahman Hakim Asdi Restana Aswanti Mindaryani Bakti Berlyanto Sedayu Budhijanto Budhijanto Budhijanto Budhijanto Cahyono, Rochim Bakti Chandra Wahyu Purnomo Daniel Timotius Derek Creaser Derek Creaser Dian Ika Nugraha Dian Ika Nugraha Endang Tri Wahyuni Endhy Kesuma Ernie Ernie Hirofumi Hinode I Made Bendiyasa I Wayan Warmada Ihda Novia Indrajati Ivone Marselina Nugraha Jayanudin Jayanudin Martin Petersson Moh. Fahrurrozi Moh. Fahrurrozi Mohammad Fahrurrozi Muhammad Fajar Setiaji Muhammad Hartono Natalia Anasta Pandu Prabowo Jati Panut Mulyono Prasakti, Laras Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Sayoga Hidayatullah Sudibyo, Hanifrahmawan Suryo Purwono Venitalitya A. S. Augustia Venitalitya A. S. Augustia Wahyu Tri Handoyo Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Widra Putri Juwita Wiratni Budhijanto Yusmardhany Yusuf Zuliyana

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