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All Journal Itepa : Jurnal Ilmu dan Teknologi Pangan Reaktor International Journal of Renewable Energy Development Teknotan: Jurnal Industri Teknologi Pertanian Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Journal of Engineering and Technological Sciences Jurnal Penelitian Karet Industria: Jurnal Teknologi dan Manajemen Agroindustri Jurnal Chemurgy Chemistry Indonesian Journal of Chemical Research ASEAN Journal of Chemical Engineering Pasundan Food Technology Journal (PFTJ) Jurnal Teknik Kimia Indonesia Jurnal Locus Penelitian dan Pengabdian Jurnal Rekayasa Proses ASEAN Journal for Science and Engineering in Materials
Yazid Bindar
Energy and Processing System on Chemical Engineering Research Group Institut Teknologi Bandung, Bandung
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Comparative performance study of two simple soot models for the prediction of soot level in atmospheric turbulent non-premixed flames . Elwina; . Yunardi; Novi Sylvia; . Wusnah; Yazid Bindar
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 2 (2011): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.482 KB)

Abstract

The increase of current fossil fuel consumption has led to an increase of soot emission into atmosphere.  Accurate prediction of soot production and destruction in a combustion system is not only important for the purpose of the design of the system, but also vital for the operation of the combustor. Numerous soot models have been proposed to predict the soot production and destruction in a flame, categorized as empirical, semi-empirical and detailed soot models.  Although the detailed model represents the highest level of soot modelling, its use has been impaired by substantial requirement of resources of computer and time. Therefore, empirical and semi-empirical approaches still have their position in soot modelling of practical combustors. In this study, two soot models, single-step and two-step models are examined in the simulation of atmospheric turbulent non-premixed sooting flames. The soot models are compared and evaluated for their performance in predicting soot level in methane and ethylene non-premixed flames.  The commercial software Fluent 6.3 was used to perform the calculations of flow and mixing fields, combustion and soot. Standard k-ε and eddy dissipation models were selected as solvers for the representation of the turbulence and combustion, respectively.  The two soot models used in the study are available directly from the code for evaluation. The results show that the two-step model clearly performed far better than the single-step model in predicting the soot level in both methane and ethylene non-premixed flames. With a slight modification in the constant a of the soot formation equation, the two-step model was capable of producing prediction of soot level closer to experimental data.  In contrast, the single-soot model produced very poor results, leading to a significant under-prediction of soot levels in both flames.
Computational fluid dynamics of crosswind effect on a flare flame . Wusnah; . Yunardi; Ilham Maulana; . Elwina; Novi Sylvia; Yazid Bindar
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 2 (2011): Engineering
Publisher : Syiah Kuala University

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Abstract

This paper presents the results obtained from the application of computational fluid dynamics (CFD) to modelling the crosswind effect on a turbulent non-premixed flame. A pre-processor software GAMBIT was employed to set up the configuration, discretisation, and boundary conditions of the flame being investigated.  The commercial software Fluent 6.3 was used to perform the calculations of flow and mixing fields as well as combustion. Standard k-ε and eddy dissipation models were selected as solvers for the representation of the turbulence and combustion, respectively.  The results of all calculations are presented in the forms of contour profiles.  During the investigation, the treatment was performed by setting a constant velocity of fuel at 20 m/s with varied cross-wind velocity and by keeping the cross-wind velocity constant at 1.1 m/s with varied fuel velocity.  The results of the investigation showed that the standard k-ε turbulence model in conjunction with Eddy Dissipation Model representing the combustion was capable of producing reliable phenomena of the flow field and reactive scalars field in the turbulent non-premixed flame being investigated. Other results of the investigation showed that increasing the velocity of the crosswind, when the fuel velocity was kept constant, significantly affected the flow field, temperature and species concentrations in the flare flame. On the other hand, when the velocity of the fuel was varied at the constant crosswind velocity, the increasing velocity of the fuel gave positive impact as it enabled to counteract the effect of crosswind on the flare flame
CFD analysis of efficiency and pressure drop in a gas-solid square cyclones separator NOVI SYLVIA; . YUNARD; . ELWINA; . WUSNAH; YAZID BINDAR
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

In this paper, two small cyclones with the same hydraulic diameter and volume, which one is square and the other one is round (Lapple cyclone), are numerically compared. A pre-processor software GAMBIT was employed to set up the configuration, discretisation, and boundary conditions of the cyclone. The characteristics of the cyclone being studied was 0.2 m in diameter, receiving a gas flow rate of 0.1 m3/s with a particle mass loading of 0.01 kg/s. A commercial CFD code FLUENT 6.2.16 was employed to simulate the flow field and particle dynamics in the cyclone. The Reynolds averaged Navier–Stokes equations with Reynolds Stress Turbulence Model (RSTM) are solved by use of the finite volume method based on the SIMPLE pressure correction algorithm in the computational domain. The Eulerian–Lagrangian computational procedure is used to predict particles tracking in the cyclones. The velocity fluctuations are simulated using the Discrete Random Walk (DRW).The results show that collection efficiency of square cyclone is the better with increasing flow rate than round cyclone. The pressure drop in square cyclone is higher than the pressure drop in small round one.
Simulation of the crosswind and the steam addition effect on the flare flame . WUSNAH; . YUNARDI; NOVI SYLVIA; . ELWINA; YAZID BINDAR
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (187.099 KB)

Abstract

This paper presents the results obtained from the application of computational fluid dynamics (CFD) to modelling the crosswind and steam addition effect on a turbulent non-premixed flame. A pre-processor software GAMBIT was employed to set up the configuration, discretisation, and boundary conditions of the flame being investigated.  The commercial software Fluent 6.3 was used to perform the calculations of flow and mixing fields as well as combustion. Standard k-ε and eddy dissipation models were selected as solvers for the representation of the turbulence and combustion, respectively.  The results of all calculations are presented in the forms of contour profiles.  During the investigation, the treatment was performed by setting a  velocity of fuel at 20 m/s with varied cross-wind velocity at  3.77 m/s, 7.5 m/s and 10 m/s,  and steam/fuel ratio at 0.14, 0.25 and 2.35.  The results of the investigation showed that the standard k-ε turbulence model in conjunction with Eddy Dissipation Model representing the combustion was capable of producing reliable phenomena of the flow field and reactive scalars field in the turbulent non-premixed flame being investigated. Other results of the investigation showed that increasing the velocity of the crosswind, when the fuel velocity was kept constant, significantly affected the flow field, temperature and species concentrations in the flare flame. On the other hand, when the velocity of the fuel was varied at the constant crosswind velocity, the increasing velocity of the fuel gave positive impact as it enabled to counteract the effect of crosswind on the flare flame. The velocity of the crosswind very influence of combustion efficiency, from result of the investigation showed that increasing the velocity of the crosswind significantly affected the combustion efficiency, other result of the inverstigation showed that steam addition will very influencing combustion, excelsior the steam/fuel ratio results the combustion efficiency decrease
PEMBAKARAN RUMPUT GAJAH UNTUK MENGHASILKAN HOT OIL DAN MEMBANGKITKAN TENAGA LISTRIK PADA INDUSTRI KIMIA Agnes Cicilia Manopo; Fika Dwi Oktavia; Nur Aini; Indah Lestari; Ari Susandy Sanjaya; Novy Pralisa Putri; Yazid Bindar
Jurnal Chemurgy Vol 4, No 1 (2020): Jurnal Chemurgy-Juni 2020
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v4i1.4068

Abstract

Penggunaan rumput gajah menjadi alternatif baru pengganti fosil. Pembakaran rumput gajah akan menghasilkan panas (thermal) yang mampu memanaskan oil sebagai pengganti steam dan berpotensi sebagai pembangkit listrik dengan siklus Organic Rankine Cycle (ORC) pada pabrik industri kimia. Pembakaran sempurna rumput gajah membutuhkan 50% udara berlebih untuk menghasilkan gas dengan komposisi N2, CO2,O2, H2O, SO2, dan NO2. Penggunaan bahan baku 730 kg rumput gajah mampu memanaskan therminol 66 (hot oil) pada suhu 300 ºC dengan laju alir 38.400 kg/jam. Pada siklus Organic Rankine Cycle (ORC) digunakan R245FA sebagai fluida kerja yang bertekanan dan bersuhu tinggi. Terjadi perubahan fase pada R245FA dari fasa cair pada suhu 51ºC menjadi fasa uap pada suhu 150ºC  dengan tekanan 31 bar yang terjadi di evaporator. Kerja sebesar 427 kW dapat dihasilkan dengan menurunkan suhu dan tekanan menjadi 106ºC, 3 bar pada turbin dengan effisiensi kerja sebesar 27%. Penghematan dilakukan dengan cara mendaur ulang R245FA yang dilewatkan pada kondensor sehingga terjadi perubahan fase dimana R245FA menjadi fasa cair kembali pada suhu 50ºC. R245FA di pompakan kembali menuju evaporator dengan menaikan tekanan dan suhu. Siklus terjadi terus-menerus sehingga tidak perlu penambahan R245FA. Kata kunci: Pembakaran, Rumput Gajah, Hot Oil, Listrik, ORC. 
SIMULASI PROSES BIOMETIL AKRILAT-AIR MENGGUNAKAN METODE PRESSURE SWING DISTILLATION PADA ASPEN HYSYS V8.8 Indah Lestari; Fika Dwi Oktavia; Ari Susandy Sanjaya; Yazid Bindar
Jurnal Chemurgy Vol 3, No 2 (2019): Jurnal Chemurgy-Desember 2019
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.115 KB) | DOI: 10.30872/cmg.v3i2.3580

Abstract

Bio-Metil akrilat akan membentuk campuran azeotrop dengan Air sehingga sulit dipisahkan dengan distilasibiasa. Terdapat dua cara untuk memisahkan campuran azeotrop tersebut yaitu dengan menggunakan distilasiekstraktif (penambahan pentana yang berasal dari bahan fosil) dan menggunakan distilasi bertingkat dimanatekanan masing-masing kolom berbeda (Pressure Swing Distillation). Dalam metode Pressure Swing Distillation dilakukan dengan menggunakan kolom dalam dua tahap, Low Pressure Distillation (101,3 kPa) dan High Pressure Distillation (500 kPa). Untuk memperoleh simulasi yang tepat maka digunakan Fluid Packages PR-Twu pada Aspen Hysys V8.8. Pada tahap pertama, hasil reaksi diumpankan ke kolom distilasi pada tekanan atmosfer untuk memisahkan antara Bio-Metil akrilat dan Air sehingga didapatkan pada fase atas distilasi sebanyak 63,04% Biometil akrilat dan hanya sedikit Air, Bio-Metanol dan Bio-Asam Akrilat yang masih terkandung. Tahap kedua, menggunakan tekanan yang lebih tinggi yaitu 500 kPa yangdiumpankan ke Reboiler sehingga pada tahap kedua didapatkan kemurnian Bio-Metil akrilat sebanyak 99,99% melebihi menggunakan distilasi ekstraktif hanya mendapatkan kemurnian Bio-Metil akrilat 96% (US Patent 2916512).Kata kunci : Pressure Swing Distillation; Biometanol; PR-Twu; Kemurnian; Hysys
Propane Dehydrogenation in a Modified Porous Membrane Reactor for Producing Propylene with Chemical and Polymer Grades Azis Trianto; Yazid Bindar; Noezran Noezran
ASEAN Journal of Chemical Engineering Vol 5, No 2 (2005)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.50187

Abstract

Propane dehydrogenation is a promising route for producing propylene to replace traditional cracking methods. A membrane reactor offers a possibility to produce not only chemical grade but also polymer grade of propylene. The purpose of the present study is to evaluate the performance of a Modified Porous Membrane Reactor (MPMR) in producing these two propylene grades simultaneously. The study involves evaluations based on thermodynamics and process flow sheeting. The performance of this reactor is compared to that of conventional reactor. At first, the thermodynamics is conducted using minimum Gibb's Energy approach. Then the process flow sheeting evaluation is built using the HYSYS simulator. The effect of inert gas (steam) concentration in both sweep and feed sides is investigated. The thermodynamics study results optimum temperature and inert gas concentration to obtain these two grades of propylene simultaneously. The propylene with polymer grade above 99% is produced from the sweep side outlet. The propylene with chemical grade is produced from the feed side outlet. The simultaneous production of these two grades of propylene has benefit in vanishing propane-propylene splitter. Keywords: Membrane reactor, porous membrane, propane dehydrogenation, propylene production, and process simulation.
RANCANG BANGUN ALAT PENGERING DENGAN SISTEM PENGERINGAN GABUNGAN PERPINDAHAN PANAS TIDAK LANGSUNG DAN VAKUM jaka rukmana; Yazid Bindar
Pasundan Food Technology Journal (PFTJ) Vol 4 No 3 (2017): PASUNDAN FOOD TECHNOLOGY JOURNAL (PFTJ)
Publisher : Department of Food Technology, Universitas Pasundan, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.338 KB) | DOI: 10.23969/pftj.v4i3.646

Abstract

Tujuan umum dari penelitian ini adalah untuk pencapaian ketahanan pangan Indonesia melalui pembangunan industri hilir berbahan baku tepung nangka. Tujuan khususnya adalah untuk melakukan kajian mengenai produksi tepung nangka menggunakan alat pengering dengan sistem pengering gabungan antara perpindahan panas tidak langsung dan kondisi vakum. Penelitian ini terbagi kedalam 3 tahap. Tahap pertama adalah merancang alat pengering, uji performa alat pengering, dan penentuan kondisi optimum untuk produksi tepung nangka. Tahap kedua adalah pengujian umur simpan tepung nangka. Tahap ketiga adalah uji kegunaan tepung nangka yang dihasilkan. Hasil penelitian tahap pertama menunjukan bahwa alat pengering hasil perancangan memiliki performa yang baik. Hal ini ditunjukan dengan nilai humiditi dari ruang pengering sebesar 0,0186 kg H2O / kg udara kering dan tekanan yang stabil selama proses pengeringan yaitu sebesar -61,5 cmHg.
Karakterisasi Bahan Pewarna Tinta Termokromik Leuco Dye System Pada Produk Pempek Ikan Elfa Susanti Thamrin; Endang Warsiki; Yazid Bindar; Ika Amalia Kartika
Jurnal Ilmu dan Teknologi Pangan (ITEPA) Vol 11 No 4 (2022): Jurnal ITEPA
Publisher : Department of Food Science and Technology Study Program, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/itepa.2022.v11.i04.p05

Abstract

Good product packaging is one of the fundamental factors in determining the quality of a product. Along with the development of science and technology, modern packaging has evolved into intelligent packaging, which can directly communicate with consumers about the quality and quality of the packaged products without opening the package. One of the smart packaging trends being developed is thermochromic ink, or thermochromic ink that can be applied in the form of films or packaging labels. Thermochromic inks change color as processing and storage temperatures change. Smart packaging in the form of thermochromic ink (Thermochromic ink) uses one of the ingredients, namely the leuco dye system. The leuco dye system consists of 3 main components, namely dye, developer and solvent. Limitations in manufacturing thermochromic ink are that the dyes and developer materials used are toxic, which can pose a risk to human health when these materials migrate from packaging to packaged food products. Therefore, it is necessary to characterize the dye (dye) against temperature and pH changes. The purpose of this study was to characterize the dye used to produce thermochromic ink with the best color change. Characterization of dyes using pH indicator dyes include Bromothymol Blue, Bromophenol Blue, Bromocresol Purple, Bromocresol Green, and Methyl Red. 15 mg of pH indicator of each dye was dissolved in 10 ml of 97% ethanol and then immobilized on filter paper at room temperature for 24 hours. Test the indicator dye's sensitivity to NH3 vapor by simulating NH3 vapor from NH4OH evaporating in a closed, airtight container. 10 mL of 1N NH4OH solution and 5 mL of each dye solution were placed in the same closed glass container. The variables observed were color changes and pH changes at 0, 5, 10 and 15 minutes.
The Evaluation of Spray Drying Process Condition on the Characteristics of Xylitol Powder from Oil Palm Empty Fruit Bunches Mardawati, Efri; Rialita, Tita; Suryadi, Edy; Rahmah, Devi Maulida; Anggraini, Sulistina; Bindar, Yazid
Industria: Jurnal Teknologi dan Manajemen Agroindustri Vol 9, No 1 (2020)
Publisher : Department of Agro-industrial Technology, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.industria.2020.009.01.3

Abstract

AbstractXylitol is a low-calorie, natural sweetener which has similar sweetness properties to sucrose. Xylitol can be produced from the hemicellulose hydrolysate of Oil Palm Empty Fruit Bunches (OPEFB). Several steps required for this process, including pretreatment, the hydrolysis of xylan to xylose and the reduction of xylose to xylitol. In a commercial market, xylitol is commonly found in the form of powder in order to maintain its distribution stability and practicality. The spray drying method is a drying method that is mostly used in dry or powder products manufacturing industry. This research aims to investigate the effect of spray drying and to determine proper inlet temperature and maltodextrin concentration on xylitol powder characteristics that are similar to the quality of commercially produced xylitol. Randomized Group Design Method is a data processing method used in this research which consisted of two factors: inlet temperature (160 oC and 180 oC) and maltodextrin concentrations (20%, 25%, and 30%). Based on the result of the research, the inlet temperature significantly affected the water content, solubility, hygroscopic levels and calorie content. Results also showed that maltodextrin concentration had a significant effect on the hygroscopic levels, water content and calorie content. Xylitol powder similar to the commercially produced xylitol was obtained from the inlet temperature of 160 oC and 20% of maltodextrin, with the water content of 5.17%, hygroscopic levels of 8.55%, solubility of 99.346%, calorie content of 2.71 cal/g and xylitol content of 0.034 g/L.Keywords: inlet temperature, maltodextrin, oil palm empty fruit bunch, spray drying, xylitol
Co-Authors . ELWINA . Elwina . Wusnah . Wusnah . YUNARD . Yunardi Abdullah Nur Aziz Abrar Riza, Abrar Achmad Roesyadi Agnes Cicilia Manopo Alwan, Hafid Anggraini, Sulistina Anton Irawan Aprilina Purbasari Ari Susandy Sanjaya, Ari Susandy Asep Bayu Dani Nandiyanto Asep Kurniawan Aslan, Christian Az-zahra, Syifa Azis Trianto Aziz Trianto Bakar, Muhammad Saifullah Abu Bayu Alamsari D. Santiani Darisman, Darisman Dwiwahdju Sasongko, Dwiwahdju Edy Suryadi Efri Mardawati Elfa Susanti Thamrin Elvi Restiawaty Endang Warsiki Fawwaz, Mifta Feerzet Achmad Fika Dwi Oktavia Fika Dwi Oktavia Harimawan, Ardiyan Herri Susanto I.G.B Ngurah Makertihartha Ika Amalia Kartika Ilham Maulana Indah Lestari Indah Lestari Jaelawijaya, Arwinda Aprillia Jaka Rukmana Luqman Buchori M. Dani Supardan M. Effendy M. Effendy M.T.A.P. Kresnowati Masduqi, Alif Lutfia Mohammad Effendy N. A. Sutrisniningrum Noezran Noezran Novi Sylvia Novy Pralisa Putri Nur Aini Parsaulian Siregar Pasymi, P. Pisey Hoeung Pujianti, Dina Rahmina, Fathya Renanto Handogo Reni Yuniarti Restiawaty , Elvi Rosa, Vila S. Subagjo S. Subagjo S. Subagjo Samuel Pati Senda Semuel Pati Senda Shofinita, Dian Silvia Oktavia Nur Yudiastuti Simbolon, Yusril Mahendra Sinaga, Kristomi Yahya Teguh Kurniawan Teguh Kurniawan Tita Rialita Tjokorde Walmiki Samadhi Vita Wonoputri Wahono Sumaryono Yogi W. Budhi Yogi Wibisono Budhi Yul Yunazwin Nazaruddin