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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 Teknologi Kimia Unimal 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

Author-ID : 242562

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Other

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Axial Inlet Geometry Effects on the Flow Structures in a Cyclone Burner Related to the Combustion Performance of Biomass Particles Pasymi, P.; Budhi, Yogi Wibisono; Bindar, Yazid
Journal of Engineering and Technological Sciences Vol 50, No 5 (2018)
Publisher : ITB Journal Publisher, LPPM ITB

Solid fuel combustion is always preceded by chemical decomposition. This process is largely determined by the flow structure and affected by the geometry and operating conditions of the combustion chamber. This study aimed to investigate the effect of relative axial inlet diameter (Dai//Dbc) on the flow structure in the proposed cyclone burner. The flow structure was determined with the standard k-e turbulent model using the Ansys-Fluent software. From the simulation results it was concluded that with all the axial inlet diameters used an integrated vortex formed in the center of the burner cylinder. The integrated vortex consisted of two vortices, namely a primary vortex and a secondary vortex. The primary vortex penetrated from the furnace box to the burner cylinder, while the secondary vortex was formed in the burner cylinder itself. There were two integration patterns from the primary vortex and the secondary vortex, namely a summation pattern and a multilayer pattern. The presence of a vortex in the center of the burner cylinder is allegedly responsible for an increase in the degree of mixing and pressure drop in that zone. The flow structure induced from the proposed burner had high symmetricity and was largely determined by the burner’s axial inlet diameter.

Mercury Elemental Storage Tank Design Restiawaty, Elvi; Bindar, Yazid; Aslan, Christian; Masduqi, Alif Lutfia
Reaktor Volume 20 No.2 June 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Mercury is a liquid metal that has properties such as toxic, persistent, bioaccumulating, and its vapor can spread around sources so that it is harmful to humans. Despite having dangerous properties, mercury is found in some goods, products, and also waste. Mercury is indicated to be used in several industries, such as artisanal and small-scale gold mining and coal-fired steam power plants. Based on health and environmental considerations, mercury must ultimately be removed from the eco cycle. Mercury storage systems in the long term must be solved so that sustainable development for future generations can be achieved. Currently, there is still no mercury storage system in Indonesia with a good standard design, so the conceptual design study of the mercury elemental storage system is important. In this paper, the storage tanks with a mercury capacity of 35 kilograms, one tonne, and two tonnes were designed to meet mercury storage standards. Several design criteria were used as model development, such as storage capacity, height level, safety factor material, storage temperature, tank life span, and symbols and label. The design results presented in this paper are dimension and engineering drawing of the storage tanks and attributes like spill tray, pallet, and rack.Keywords: environment; hazardous and toxic material; Indonesia; mercury; storage tanks

Thermal and Ash Characterization of Indonesian Bamboo and Its Potential for Solid Fuel and Waste Valorization Purbasari, Aprilina; Samadhi, Tjokorde Walmiki; Bindar, Yazid
International Journal of Renewable Energy Development Vol 5, No 2 (2016): July 2016
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.5.2.95-100

Bamboo has been widely used in Indonesia for construction, handicrafts, furniture and other uses. However, the use of bamboo as a biomass for renewable energy source has not been extensively explored. This paper describes the thermal and ash characterization of three bamboo species found in Indonesia, i.e. Gigantochloa apus, Gigantochloa levis and Gigantochloa atroviolacea. Characterization of bamboo properties as a solid fuel includes proximate and ultimate analyses, calorific value measurement and thermogravimetric analysis. Ash characterization includes oxide composition analysis and phase analysis by X-Ray diffraction. The selected bamboo species have calorific value comparable with wood with low nitrogen and sulphur contents, indicating that they can be used as renewable energy sources. Bamboo ash contains high silicon so that bamboo ash has potential to be used further as building materials or engineering purposes. Ash composition analysis also indicates high alkali that can cause ash sintering and slag formation in combustion process. This implies that the combustion of bamboo requires the use of additives to reduce the risk of ash sintering and slag formation.Â Article History: Received May 15, 2016; Received in revised form July 2nd, 2016; Accepted July 14th, 2016; Available online How to Cite This Article: Purbasari, A., Samadhi, T.W. & Bindar, Y. (2016) Thermal and Ash Characterization of Indonesian Bamboo and its Potential for Solid Fuel and Waste Valorization. Int. Journal of Renewable Energy Development, 5(2), 95-100.http://dx.doi.org/10.14710/ijred.5.2.96-100Â

Front Matter Vol 5, No 2 (2006) Bindar, Yazid
Jurnal Teknik Kimia Indonesia Vol 5, No 2 (2006)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Penyusunan model dan simulasi pembentukan besi karbid dan karbon bebas pada zona pendidingan reaktor HYLSA Bayu Alamsari; Aziz Trianto; Yazid Bindar
Jurnal Teknik Kimia Indonesia Vol 5, No 3 (2006)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2006.5.3.5

Modeling and simulation of iron carbide and carbon-free formation in cooling zone of reactor HYLSAThe sponge iron production rate increasing in iron ore reduction plant through the nsmg reduction gas temperature will cause more cooling gas flow rate. The objective of this research is to study the effect of cooling gas flow rate on iron carbide and carbon deposit formation through mathematical modelling arrangement and simulation on cooling zone of sponge iron reactor. The modeling is carried out by applying kinetics model. The equations were solved by finite element method. From this study, it was found that the decrease of methane concentration due to iron carbide and free carbon formation occurs when solid temperature reaches 448 oC and 505 oC, respectively. In addition, simulation results show that the cooling gas flow rate above 76000 NCMH is not profitable. On constant methane concentration, the rate of Fe3C and free carbon formation decrease with increasing cooling gas flow rate. However, increasing cooling gas flow rate on make-up gas concentration 95% will decrease total carbon formation. On constant cooling gas flow rate, the rate of Fe3C and free carbon formation increased proportionally with methane concentration.Keywords: Kinetics Simulation, Sponge Iron Reactor, Methane Decomposition, Iron CarbidedAbstrakPeningkatan kapasitas produksi besi span pada pabrik reduksi bijih besi melalui peningkatan temperatur gas pereduksi akan berakibat pada tingginya laju alir gas pendingin yang dibutuhkan. Penelitian ini bertujuan untuk melihat pengaruh laju gas pendingin terhadap pembentukan besi karbida dan total karbon pada besi span melalui penyusunan dan simulasi model matematika pada zona pendingin besi span. Pemodelan matematika dilakukan melalui penyusunan model berbasis kinetika dan diselesaikan secara numerik dengan menggunakan metode penghampiran selisih terhingga. Dari hasil penelitian didapatkan bahwa konsentrasi CH<sub>4</sub> menurun akibat adanya pembentukan Fe3C dan dekomposisi met an masing-masing ketika temperatur padatan mencapai 449 oC dan 505 oC. Peningkatan laju alir gas pendingin sampai di alas 76000 NCMH pada kondisi perhitungan tidak akan menguntungkan karena temperatur produk tidak akan dapat mencapai nilai yang lebih rendah lagi. Selain itu, semakin tinggi laju alir gas pendingin, pada konsentrasi gas make-up yang dipertahankan sama dengan umpan, jumlah total karbon semakin sedikit. Sedangkan peningkatan laju alir gas pending in dengan konsentrasi gas make-up sebesar 95% akan meningkatkan jumlah total karbon. Peningkatan konsentrasi CH4 pada laju alir gas pendingin yang tetap, akan meningkatkanjumlah total karbon yang terbentuk.Kata Kunci: Simulasi Berbasis Kinetika, Reaktor Besi Spon, Dekomposisi Metan, Pembentukan Besi Karbid

Development of granular urea-zeolite slow release fertilizer using inclined pan granulator Pisey Hoeung; Yazid Bindar; Samuel Pati Senda
Jurnal Teknik Kimia Indonesia Vol 10, No 2 (2011)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2011.10.2.6

Slow release fertilizers (SRFs) are so crucial in improvement of agriculture productions. To increase urea fertilizer effectiveness and efficiency, the product could be modified in the form of SRFs. The objective is to conduct slow release urea fertilizer. During granulation, particle sizes of urea and natural zeolite mixture (50, 60 and 80 mesh), binder solution with different percentage (2% to 10%) of starch, and clay additives (5%, 7.5%, and 10%) were used. The obtained granule was further analyzed using percolation reactor to determine the slow release rate. Leachate from reactors was collected, by using UV-visible spectrophotometric method, concentration of dissolved urea was determined. The granule size of 3-4 mm, the urea-zeolite mixture particle size of 60-mesh, the percentage of clay addition in the granulation process of 7.5%, the percentage of starch addition in binder solution of 3% are selected to be the best in term of the roughness of the granules, economic aspects, and slow release rate. In addition, it is proportionally defined the release time of nutrient from experiment and from simulated program is at least for three months which is plenty of time for crops, especially for rice. Key words: Slow Release Fertilizer, Zeolite, Urea, Inclined pan granulatorAbstrakSlow release fertilizers (SRFs) memiliki peranan yang sangat penting dalam peningkatan produksi pertanian. Untuk meningkatkan efisiensi dan efektifitas pupuk urea, produk pupuk bisa dimodifikasi dalam bentuk SFRs. Tujuan dari penelitian ini adalah untuk membuat slow release urea fertilizer. Selama proses granulasi, digunakan ukuran partikel campuran urea dan zeolit alam (50, 60 dan 80 mesh), cairan perekat dengan persentase yang berbeda (2% sampai 10%) starch, dan tambahan tanah liat (5%, 7,5%, dan 10%). Butiran-butiran (granul) yang diperoleh selanjutnya dilakukan analisis menggunakan reaktor perkolasi digunakan untuk menentukan laju slow release. Leachate dari reaktor dikumpulkan, kemudian konsentrasi urea terlarut dapat diketahui dengan menggunakan metode spektrofotometri UV-Vis. Granul 3-4 mm, ukuran 60 mesh campuran antara urea dan zeolit, persentasi penambahan tanah liat dalam proses granulasi sebesar 7,5%, dan persentasi penambahan starch dalam larutan perekat sebesar 3% menunjukkan hasil yang terbaik untuk tingkat kekasaran butiran, aspek ekonomi dan menunjukkan pelepasan nutrisi lambat. Secara proporsional dapat dikatakan bahwa waktu pelepasan nutrisi yang diperoleh dari percobaan dan simulasi program, setidaknya untuk tiga bulan sangat cukup untuk tanaman, khususnya untuk padi.Kata kunci: Slow release fertilizers, Zeolit, Urea, granulator panci miring.

Pemodelan dan simulasi reverse flow reactor untuk oksidasi katalitik metana: pengembangan prosedur operasi start-up Yogi Wibisono Budhi; Teguh Kurniawan; Yazid Bindar
Jurnal Teknik Kimia Indonesia Vol 10, No 2 (2011)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2011.10.2.4

Modeling and simulation of reverse flow reactor for the catalytic oxidation of methane: the development of start-up operating procedures In this modelling and simulation study, three operating procedures during start-up of lean methane (1%-v) oxidation in reverse flow reactor (RFR) have been investigated to get auto-thermal condition, high methane conversion, faster pseudo steady state, and low preheating energy requirement. The RFR model developed based on one-dimension pseudo-homogeneous model for mass balance and heterogeneous model for energy balance. Procedure 1 , the preheating was employed only on the catalyst zone, fails to conduct the auto-thermal reaction and to achieve high conversion. Procedure 2, the preheating was employed for inert and catalyst of left side only, able to achieve the auto-thermal up to switching time (ST) 230 s. Procedure 3, the preheating was employed along the reactor bed, achieve the auto-thermal condition up to ST 300 s. Procedure 2 and 3 achieved the pseudosteadystate at 1000 s for ST 200 s with total conversion during start-up are 95% and 99%. The conversion of Procedure 3 higher than Procedure 2, unfortunately the heat load of Procedure 3 two times higher than Procedure 2. Keywords: modelling and simulation, catalytic methane oxidation, start-up procedure, reverse flow reactor, switching timeAbstrakDi dalam studi pemodelan dan simulasi ini, berbagai prosedur operasi reverse flow reactor (RFR) selama start-up untuk oksidasi katalitik metana encer (1%-v) dikaji dengan target sistem beroperasi secara ototermal, konversi metana tinggi, waktu pencapaian kondisi tunak semu (pseudosteady state) cepat, dan beban panas rendah. Pemodelan reaktor didasarkan pada model satu dimensi dan pseudohomogeneous untuk neraca massa, serta heterogen untuk neraca energi. Pemanasan katalis saja pada awal reaksi (Prosedur 1) tidak dapat mencapai kondisi reaktor yang ototermal. Pemanasan katalis dan inert bagian kiri (Prosedur 2) mampu mencapai kondisi reaktor yang ototermal hingga switching time (ST) 230 detik. Pemanasan seluruh bagian reaktor pada awal reaksi (Prosedur 3) mampu mencapai kondisi reaktor yang ototermal pada ST paling lama 300 detik. Prosedur start-up 2 dan 3 untuk ST 200 detik sama-sama mencapai waktu pseudosteady state pada 1000 detik dengan konversi total selama start-up masing-masing 95% dan 99%. Meskipun Prosedur 3 memberikan konversi sedikit lebih tinggi daripada Prosedur 2, namun beban panas Prosedur 3 mencapai dua kali lebih besar daripada Prosedur 2.Kata kunci: emisi metana, pemodelan dan simulasi, prosedur start-up, reverse flow reactor, switching time.

Comparative Study of Glucose and Xylose Production in Enzymatic Hydrolysis Result by Batch and Fed Batch Method Silvia Oktavia Nur Yudiastuti; Efri Mardawati; MTAP Kresnowati; Yazid Bindar
Teknotan: Jurnal Industri Teknologi Pertanian Vol 12, No 1 (2018): TEKNOTAN, April 2018
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol12n1.9

Xylose is a five carbon chain monosaccharide that can be used as a substrate in the fermentation of low-calorie xylitol. While glucose is a six carbon chain monosaccharide that can be processed into glucose syrup as a more stable natural sweetener in the food processing industry. Xylose is xylan monomer produced from hydrolysis of hemicellulose from plants or biomass woody waste. While glucose is the result which is also produced in xylan hydrolysis by xylanase enzymatic hydrolysys. In the search for the source of hemicellulose, oil palm empty fruit bunch (OPEFB) as a solid waste from crude palm oil processing is a source that can be utilized in this research. OPEFB waste is abundant by the increasing world demand for vegetable oil. Considering the OPEFB enzymatic hydrolysis was a hetrogenous solid-liquid reaction, fed batch feeding of substrate was thought to improve the reaction performance. Hydrolysis experiments were performed at temperature 500C, pH 5 and for 96 hours hydrolysys time with substrate concentration at 15% and enzyme dose of 1%. The result showed that the feed-batch hydrolysis configuration provided higher yield of xylose and glucose than batch configuration but unsignificant.Keywords : Enzymatic Hydrolysis, Fed-batch, glucose, Xylan, Xylanase, Xylose.

Optimization of cyclone geometry for maximum collection efficiency . Yunardi; Ilham Maulana; . Elwina; . Wusnah; 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.024 KB)

This paper presents the results obtained from the application of both computational fluid dynamics (CFD) Fluent 6.3 and Design Expert codes to modelling and optimizing a gas-solid cyclone separator based upon its geometrical parameters. A pre-processor software GAMBIT was employed to set up the configuration, discretisation, and boundary conditions of the cyclone. A commercial CFD code FLUENT 6.3 was employed to simulate the flow field and particle dynamics in the cyclone. The optimization study was performed under either a constant gas inlet flow rate of 0.075 m3/s or a constant inlet gas velocity of 18 m/s. A response surface methodology with three levels (-1, 0, and +1) was employed as the experimental design. Independent variables to be optimized include the ratio of inlet gas width to diameter of the cyclone, W/D, the ratio of conical length to diameter, Lc/D and the ratio outlet diameter to cyclone diameter De/D. The response variables of collection efficiency and pressure drop were correlated in the forms of quadratic polynomial equations. The simultaneous optimization of the response variables has been implemented using a desirability function (DF) approach, computed with the aid of Design Expert software. The results of investigation showed that at constant flow rate, the following optimum ratios of W/D =0,28, Lc/D =1,5, and De/D =0,52 were obtained to give a collection efficiency of 90% and a pressure drop of 155 Pa. At the constant inlet gas velocity, the following optimum ratios of W/D =0,25, Lc/D =1,5, and De/D =0,57 were obtained to give a collection efficiency of 90% and a pressure drop of 190 Pa. This findings indicate that gas inlet treatment at either constant flow rate or constant inlet gas velocity does not produce significant difference on the collection efficiency, but does give significant influence on the pressure drop.

Analysis of turbulence models performance for the predictions of flow yield, efficiency, and pressure drop of a gas-solid cyclone separator Novi Sylvia; . Yunardi; Ilham Maulana; . Elwina; . 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 (1136.525 KB)

This paper presents the results obtained from the application of computational fluid dynamics (CFD) to modelling the flow field of a Lapple cyclone and to optimizing the cyclone based upon its geometrical parameters. 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/m3. A commercial CFD code FLUENT 6.2.16 was employed to simulate the flow field and particle dynamics in the cyclone. The objective of this research was to investigate the performance of a number of turbulence models on the prediction of the flow field, collection efficiency and pressure drop in the Lapple cyclone. A number of five turbulence models under Reynolds Averaged Navier Stokes (RANS) category, including Spallart-Allmaras, standard k-ε model, RNG k-ε model, standard k-ω model, and Reynolds Stress Model (RSM) were examined in the simulation of the flow field and particle dynamics inside the cyclone. A validation of all calculation was performed by comparing the predicted results in terms of axial and tangential velocities, efficiency and pressure drop against experimental data of a Lapple cyclone taken from literature. The results of the investigation show that out of five turbulence models being tested, the RSM presented the best predicted results. The predictions of axial and tangential velocities as well as cyclone efficiency by this model are in excellent agreement with the experimental data. Although the pressure drop in the cyclone is under-predicted, the RSM predictions are far better than those of other model. Other turbulence models are over-predicted and under-predicted the axial and tangential velocity, respectively. With respect to efficiency and pressure drop of the cyclone, other models are capable of following the trend of the experimental data but they failed to agree with the experimental values. These results suggest that the RSM is the most suitable turbulence model to represent the flow field and particle dynamics inside a cyclone gas-solid separator.

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 Wusnah Wusnah, Wusnah Yogi W. Budhi Yogi Wibisono Budhi Yul Yunazwin Nazaruddin

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