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All Journal Research Report - Engineering Science Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences JPS Unimus Journal of Social Research Makara Journal of Technology Journal of Engineering and Technological Sciences
Tedi Hudaya
Universitas Katolik Parahyangan, Bandung
Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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The Effect of Catalyst Support on the Bimetallic Ni-Ag Hydrogenation Catalyst Activity Tedi Hudaya; Nita Ardelia Jairus; Tatang Hernas Soerawidjaja
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Hydrogenation is the addition reaction of hydrogen into double bounds molecules that are very important in chemical industry. Nickel, cheaper but less active than platinum and palladium, is widely used as a hydrogenation catalyst.  Non-fossil source of hydrogen can be derived from formic acid decomposition reaction aided by a silver catalyst. Although the activity of nickel and silver are normally less than noble metals, the combination with   appropriate support are expected to produce catalysts which can compete with the more expensive noble metals. The purpose of this research is to find out which support that gives the best hydrogenation activity in Ni-Ag bimetallic catalyst system. Support used in this research were TiO2, g-Al2O3, and activated C with mole ratio Ni:Ag varied as 2:1, 3:1, and 4:1. Hydrogenation experiments conducted using kemiri sunan (Reutealis trisperma) oil with formic acid as H source, using a supported catalyst for 5 hours. The experimental results showed that all synthesized catalysts had good and comparable activities, capable of lowering the iodine value by about 32%. Catalyst with TiO2 support gave the best activity, followed by activated C, and g-Al2O3.  Meanwhile, the metal loading that yielded the best result was Ni:Ag of 4:1 . Prolonged hydrogenation lasted for 10 hours did not cause further hydrogenation reaction.
Preliminary Study of Formic Acid Synthesis from Biomass Tedi Hudaya; Felicia Kristianti; Tatang Hernas Soerawidjaja
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Hydrogen is considered as one of the energy sources can provide emission-free application. However, one of the difficulties of using hydrogen is the coherent characteristic of hydrogen, that obstruct the efficient and safe storage of the hydrogen. Therefore concepts for the liquid phase storage under ambient condition using formic acid have received many attention, so that formic acid synthesis methods that is economically feasible and enviromentally friendly is need to be known. One of them is oxidation sorbitol to form formic acids. This research will begin with synthesis of H5PV2Mo10O40 as catalyst. Preliminary experiments is done by varying reaction time (15,20, 25, 30, 60, 120, 180 minutes) to get the most favorable time. The main experiments will be done by varying pressure, temperature, and the catalyst’s in the exact reaction time. All of the oxidation reaction product then is analyzed using HPLC. The results show that the conversion of sorbitol is usually achieved at almost 100%, and the maximum yield that is achieved (75,40%) at 25 bar, 1400C, and 0,6% w/w. The effects of temperature to conversion of sorbitol and yield of formic acid is significant. The effect pressure to conversion and yield is significant at 1200C, but slightly unsignificant at the other variation. The effects of catalyst concentration is unsignificant to conversion of sorbitol, but is significant to the yield of formic acid
Kajian Proses Otoksidasi Katalitik Gliserol menjadi Asam Format Jerry Susanto; Tedi Hudaya; Tatang Hernas Soerawidjaja
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

The Optimization of UV/H 2 O Process for DYA (Dianic Yellow Ace) Textile-Dye Wastewater Treatment Tedi Hudaya; Geoffery Hariyanto; Winda Andriany
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

West Java region, especially in Bandung area, has many textile dyeing industries which are usually placed in a densely populated area. If not properly handled, the wastewater effluents will cause considerable pollution problems to the surrounding water streams due to toxic and non-biodegradable synthetic dyes content characterized by a very low BOD5/COD ratio (< 0.1).  This research studied the application of UV/H2O2 method for treating textile-dye (Dianic Yellow Ace – DYA) waste water in a pilot scale (50 L) multi-lamp bubble column photoreactor. The prime target of the treatment was to increase the BOD5/COD ratio until the biodegradability threshold was reached (> 0.1), prior to further treatment by a cheaper conventional biological method.  Two major operating conditions, the initial H2O2 concentration and pH were varied, using Central Composite Design, between 0.026 – 0.874 % w/w, and 0.17 – 5.83, respectively.  This study used a synthetic wastewater with color content similar to a  real waste water from a textile dyeing industry in Bandung.  Within the experimental condition range, 51 – 94% color content was successfully eliminated within 6 hours illumination period using 3 x 75 Watt low pressure Hg UV lamp.  Optimum conditions from 2nd order model optimization showed that the best result of 95.5% color removal could be obtained at initial H2O2 concentration of 0.53 % w/w and pH 3.35. Additional test with a real industrial wastewater under 5 x 75 Watt UV irradiation under those best conditions resulted in BOD5/COD ratio increase from 0.01 to 0.1(biodegradability threshold) within 9.5 hours.  
Synthesis of Biokerosene through Electrochemical Hydrogenation of Terpene Hydrocarbons from Turpentine Oil Tedi Hudaya; Ongky Widjaja; Antonius Rionardi; Tatang Hernas Soerawidjaja
Journal of Engineering and Technological Sciences Vol. 48 No. 6 (2016)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2016.48.6.2

Abstract

Indonesia possesses great potential for developing renewable resources as alternative fuels. For example, turpentine oil obtained from Pinus merkusii, which contains mostly monoterpene hydrocarbons (C10H16). The oil is highly suitable to be processed for biokerosene or even jet biofuel. It consists of hydrocarbons within the range of C10 to C15. However, it contains insufficient H and thus needs to be upgraded. In the present work, electrochemical hydrogenation was used for upgrading. In the electrochemical cell, stainless steel, silver, and carbon were used alternately for the anode, while copper and silver Raschig rings were used for the cathode. An electrolyte solution of cuprous ammonium formate was utilized not only as a source of H but also to draw the unsaturated hydrocarbons into the aqueous phase. The electrolyte : oil ratio (up to 2:1), electrolyte concentration (between 0.4 and 2 M) and reaction time were varied throughout the experiments. The bromine number (unsaturation level) of the turpentine oil, which was initially 1,86 (mole Br2/mole), was lowered significantly to 0.69-0.90. Promising increase of smoke point values were observed from 11 mm to 16-24 mm, indicating a higher H content of the processed oil, thus making it suitable as a substitute for petroleum kerosene.
Synthesis of Bio-hexane and Bio-Hexene from Sorbitol Using Formic Acid as Reducing Agent Michael Gunawan; Tedi Hudaya; Tatang Hernas Soerawidjaja
Journal of Engineering and Technological Sciences Vol. 53 No. 1 (2021)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2021.53.1.6

Abstract

Sorbitol (C6H14O6) is a sugar alcohol that can be synthesized from cellulose and has a similar skeletal structure as hexane (C6H14) so that it can straightforwardly be converted to hexane through deoxygenation. The bio-hydrocarbon synthesis from sorbitol in this investigation consisted of two main processes, namely synthesis of 2-iodohexane and deiodization of 2-iodohexane. The synthesis of 2-iodohexane from sorbitol and hydroiodic acid (HI) was conducted in a reflux system, to which formic acid as reducing agent was added gradually during the reaction to regenerate the iodine back to HI. The HI/sorbitol ratio (2:1 and 5:1), reaction temperature (90 °C, 105 °C, and 120 °C), and reaction time (between 2 and 6 hours) were varied throughout the experiment. Deiodization of 2-iodohexane was conducted via gas phase pyrolysis at various temperatures (265 °C to 285 °C) and reaction times (30 and 45 minutes). The sorbitol was effectively converted to a mixture of 2-iodohexane, hexane and other bio-hydrocarbons, with a 2-iodohexane yield of 23.15%. In the optimal reaction condition, pyrolysis of 2-iodohexane resulted in bio-hydrocarbon with a yield of 77.52%. The resulted hydrocarbon products were mixtures consisting of alkanes and alkenes.
Sintesis Senyawa Bioaromat Melalui Proses Siklisasi Katalitik Gugus Asam Lemak α-eleostearat Dalam Minyak Kemiri Sunan Vincensia Michelle; Tedi Hudaya; Tatang Hernas Soerawidjaja
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Kemiri sunan oil (Reutalis trisperma) is a non-edible vegetable oils which thrives in Indonesia, has α-eleostearic acid that can be processed into aromatic compound through isomerization-cyclizationdisproportionation.The purpose of this research was knowing kemiri sunan oil’s potency for synthesizingaromatic compound and the effects of the reaction’s condition and solvent : feed ratio to the yield of cycliccompound. This research was initiated by testing kemiri sunan oil quality by several tests: acid number,iodine number, and saponification number. Saponification was done using KOH at 60°C ; 3 hours. Then,Mg(NO3)2 was added as substituent for K in base soap and Cr(NO3)3 as a catalyst. Obtained Mg soap wasthen cleaned using aquadest before dried in the oven until its mass was constant at 60°C, then diluted inDiethanolamine. The reaction was held for 2 hours with the variations of temperature and ratio of solvent :feed (w/w). The product was then extracted using toluene in order to gain all of the aromatic compound.Then, the separation of the solvent from the product was done using simple distillation. Cyclic productpresence in the form of ortho-disubstituted benzene was tested qualitatively using FTIR, while thequantitative tests were conducted by Wijs test and aromatic product’s mass calculation.
PENERAPAN MODEL PEMBELAJARAN BERBASIS MASALAH (PROBLEM BASED LEARNING ) DALAM MATA KULIAH MANAJEMEN LIMBAH B3 Hans Kristianto; Tedi Hudaya
JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG Vol 6, No 2 (2018): JURNAL PENDIDIKAN SAINS (JPS)
Publisher : Pendidikan Kimia Unimus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jps.6.2.2018.41-47

Abstract

Perubahan metode pembelajaran yang sebelumnya berpusat pada pengajar (teacher-centered learning) menjadi berpusat pada siswa (student-centered learning), menuntut penggunaan berbagai model pembelajaran yang inovatif. Dalam penelitian ini dipaparkan penerapan model pembelajaran berbasis masalah (problem based learning; PBL) dalam mata kuliah Manajemen Limbah Bahan Beracun dan Berbahaya (B3) di Program Studi Teknik Kimia UNPAR pada semester genap 2016/2017, dengan tujuan mengamati  perubahan gaya belajar mahasiswa sebelum dan setelah pembelajaran dengan model PBL dengan menggunakan kuesioner Grasha. Selain itu mahasiswa diminta untuk mengisi kuesioner evaluasi pelaksanaan kegiatan pembelajaran. Teramati perubahan gaya belajar mahasiswa, yaitu pada menurunnya gaya belajar avoidant, kenaikan pada gaya belajar competitive dan collaborative. Sekalipun terlihat perubahan, hasil tersebut belum signifikan secara statistik. Hasil umpan balik dari mahasiswa peserta kuliah pun cukup positif, karena mahasiswa merasa lebih aktif, belajar bekerja dalam tim, dan berkomunikasi. Hasil-hasil positif yang ditunjukkan dalam penerapan model PBL pada mata kuliah ini membuka peluang untuk menerapkan model pembelajaran serupa pada berbagai mata kuliah lain.
Activated Carbon Fixed-Bed Adsorber Design for Treating Chromium Hexavalent Wastewater Hudaya, Tedi; Rachmat, Velicia
Makara Journal of Technology Vol. 22, No. 3
Publisher : UI Scholars Hub

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Abstract

Pollution caused by industrial wastewater containing heavy metals is a major issue, primarily due to its toxic nature. A cheap yet effective method to deal with such wastewater is activated carbon adsorption. The purpose of this research is to evaluate and design a fixed bed adsorber with granular activated carbon as an adsorbent to process wastewater-containing chromium hexavalent (Cr 6+). Experiments show that the Langmuir isotherm fits the equilibrium data as effectively as the Freundlich isotherm. Activated carbon used in this research is Jacobi 2000® derived from bituminous coal. The lab scale inlet volumetric flow is 100 mL/h with different Cr6+ concentration for each run, 20 and 35 ppm respectively. Based on scale-up calculation with Length of Unused Bed (LUB) method, for superficial flow of 400 L.m-2.min-1 and service time of six months, the column dimensions for inlet concentration of 20 ppm are 0.62 m diameter and 2.33 m height with 1.87 m carbon bed depth. Concurrently, a slightly bigger column (0.63 m diameter and 2.37 m height column with 1.89 m carbon bed) is necessary for treating inlet concentration of 35 ppm.
Pengolahan Limbah Warna DYA Industri Pencelupan Tekstil dengan Teknologi UV / H2O2/ TiO2 Hudaya, Tedi; Tunardi, Stephen Reinaldo; Octaviany, Octaviany
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Textile wastewater often contains non-biodegradable as well as toxic dyes, for example Dianix Yellow Ace (DYA). One possible destructive method of treating such waste treatment is the Advance Oxidation Processes (AOPs), in which the oxidation of organic compounds by potent hydroxyl radicals (● OH) occurs. This research had a novelty of combining UV / H2O2 with UV / TiO2 to study the effect of treatment process’ variables, i.e. [H2O2], [TiO2] and initial pH on the rate of degradation as well as the ratio of BOD / COD until biodegradability threshold was reached.  This research employed a Central Composite Design (CCD) experimental design technique that used factorial design and included center points as well as axial points for better accuracy and understanding of the process. CCD helped create a response surface model for optimization and prediction. The variations were the concentration of H2O2 between 0.01 - 1.00 %w, TiO2 concentrations ranging from 0.80 to 3.00 g.L-1 and initial pH between 1 - 11.  The order and reaction rate constants were also determined by measuring the DYA concentrations using a spectrophotometer.  The optimum condition for DYA degradation was found at pH 3, 0.2% H2O2 and [TiO2] 3 g.L-1 with a pseudo first-order rate constant of 0.0524 min-1.  UV irradiation around 75 minutes resulted in DYA removal of 99%.  The wastewater fell into the biodegradable limit after 60 minutes treatment, with a value of BOD / COD ratio was 0.1029 so that the wastewater became biodegradable to be further treated by much cheaper biological method.
Co-Authors Anastasia Prima Kristijarti Antonius Rionardi Antonius Rionardi Audrey Budiawan Audreylia, Vanessa Budi Husodo Bisowarno Catherine Chaterine Felicia Elsa Felicia Kristianti Ferynna Ferynna Geoffery Hariyanto I Gede Pandega W I Gede Pandega Wiratama Jerry Susanto Kristianto, Hans Liana Liana Luivan, Samuel Michael Gunawan Michael Gunawan Nita Ardelia Jairus Octaviany, Octaviany Ongky Widjaja Philander . Rachmat, Velicia Rionardi, Antonius Soerawidjaja, Tatang Hernas Sumargo, Margaretha Susanti, Maria Patrycia Della Susiana Prasetyo S Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tunardi, Stephen Reinaldo Vincensia Michelle Widjaja, Ongky William Tandra Winda Andriany