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All Journal Reaktor International Journal of Renewable Energy Development Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences ASEAN Journal of Chemical Engineering Jurnal Teknologi Bahan dan Barang Teknik Jurnal Teknik Kimia Indonesia International Journal of Renewable Energy Development

Isdiriayani Nurdin

Program Studi Teknik Kimia, Fakultas Teknologi Industri, Institut Teknologi Bandung

Author-ID : 334509

Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mathematics Physics

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Effect of Intermittent Spray Pyrolysis on the Characteristics of Fluorine-Doped Tin Oxide Conductive Glass for Dye Sensitized Solar Cell Isdiriayani Nurdin; Pramujo Widiatmoko; Hary Devianto; Anastasia Yuandy; Rendy Rendy
Reaktor Volume 19 No. 4 December 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

One of dye sensitized solar cell’s (DSSC) component is conductive glass, a transparent glass substrate covered with semiconductor oxide, usually fluorine-doped tin oxide (FTO). An economic and scalable method used to deposit the FTO film is spray pyrolysis. A research conducted by Fukano et al. (2004) showed that introducing intermittence in spray pyrolysis using batch atomizer improves the glass’ characteristics. This research aims to observe the effect of intermittence on spray pyrolysis method using nebulizer. A compressor nebulizer and hotplate were used, where the glass’ surface temperature reached 300oC. Transmittance, conductance, morphology and composition of the glasses produced were analyzed. Deposition time and intermittence were varied. Variation of time were 5; 7.5; 10; 16; and 39 minutes. Deposition time of 7.5 minutes showed the highest figure of merit (FOM) of 7.83×10-3 Ω-1. Intermittence was performed by turning the nebulizer off during deposition, with varying period and amount of intermittence. Periods of intermittence were varied for 10, 20, and 30 seconds, and amounts of intermittence were varied 1, 2, and 3 times. Variation of 3 intermittences at 20 seconds each resulted in the highest FOM of 19.29×10-3 Ω-1. DSSC’s efficiency built using produced conductive glass are 1.9×10-4 % and 5.5×10-4 %.

PENGARUH JENIS ANODA PADA PROSES PEMULIHAN LOGAM NIKEL DARI TIRUAN AIR LIMBAH ELECTROPLATING MENGGUNAKAN SEL ELEKTRODEPOSISI Djaenudin Dhaenudin; Mindriany Syafila; Edwan Kardena; Isdiriayani Nurdin
Reaktor Volume 14, No. 3, APRIL 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

EFFECT OF ANODES TYPES ON NICKEL RECOVERY FROM SYNTHETIC ELECTROPLATING WASTE ELECTRODEPOSITION CELLS. A study concerning the recovery of nickel from electroplating wastewater artificial solution. The study was conducted with a batch system using electrodeposition cell consisting of two spaces separated by water hyacinth leaf, copper cathode plate, H2SO4 solution anolyte, catholyte solution of NiSO4 plus NaCl supporting electrolyte and anode varied. Electrodeposition performed at the direct current of 5V power for 4 hours each run. The research objective was to obtain the best anode in nickel electrodeposition process of electroplating waste artificial solution. Graphite, stainless steel type AISI 316 and the lead were used as a variation of the anode. Concentration of nickel in the catholyte at baseline 2200 mg/L. The results showed that the anode was a graphite anode with best value decreased by 72.44% nickel concentration, deposition of nickel on the cathode of 0.188 grams and specific energy values of 6.1625 kWh/kg.nickel. Telah dilakukan penelitian tentang pemulihan logam nikel dari larutan tiruan air limbah electroplating. Penelitian dilakukan dengan sistem batch menggunakan sel elektrodeposisi yang terdiri dari dua ruang yang dipisahkan dengan daun eceng gondok, katoda pelat tembaga, anolit larutan H2SO4, katolit larutan NiSO4 ditambah elektrolit pendukung larutan NaCl dan anoda divariasikan. Elektrodeposisi dilakukan pada listrik searah sebesar 5V selama 4 jam setiap tempuhan. Tujuan penelitian adalah memperoleh anoda terbaik pada proses elektrodeposisi nikel dari larutan tiruan limbah electroplating. Grafit, Stainless Steel tipe AISI 316 dan timbal digunakan sebagai variasi jenis anoda. Konsentrasi nikel dalam katolit pada awal penelitian 2200 mg/L. Hasil penelitian menunjukkan bahwa anoda grafit merupakan anoda yang paling baik dengan nilai penurunan konsentrasi nikel sebesar 72,44%, deposisi nikel di katoda sebesar 0,188 gram dan nilai energi spesifik sebesar 6,1625 kWh/kg.nikel.

Inhibisi Korosi Baja Karbon di dalam Larutan Karbonat-bikarbonat Isdiriayani Nurdin; M. Syahri
Journal of Mathematical and Fundamental Sciences Vol. 31 No. 1 (1999)
Publisher : Institute for Research and Community Services (LPPM) ITB

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

Sari. Sistem absorpsi CO2 yang menggunakan absorben K2CO3 merupakan salah satu satuan operasi yang rawan korosi, terutama di bagian yang berhubungan dengan larutan "kaya" yang mengandung KHCO3. Baja karbon, yang biasa digunakan sebagai bahan konstruksi pada sistem absorpsi CO2 terkorosi oleh larutan K2CO3 + KHCO3 tetapi juga bersifat mampu pasif dalam larutan tersebut. Oleh sebab itu, korosi pada sistem absorpsi CO2 dapat dikendalikan dengan menggunakan inhibitor pasivator seperti KVO3. Dari hasil pengujian yang telah dilakukan, ternyata KVO3 dengan dosis 20 g/dm3 efektif menurunkan laju korosi baja karbon dalam larutan K2CO3 + KHCO3 pada suhu 100 °C, dan turbulensi yang tinggi. Lapisan pasif yang terbentuk dengan penambahan inhibitor vanadate terutama terdiri dari n-Fe2O3 dan FeVO4 Na-benzoat, yang juga inhibitor pasivator, dapat menurunkan laju korosi baja karbon dalam lingkungan yang sama dengan efektifitas yang tidak jauh berbeda, tetapi dengan dosis lebih rendah (14 g/dm3). Lapisan pasif yang dihasilkan dengan penambahan inhibitor Na-benzoat terdiri dari n-Fe2O3 dan Fe2(OH)2CO3. Corrosion Inhibition of Carbon-Steel in Carbonate-Bicarbonate SolutionAbstract. Carbondioxide (CO2) absorption system, using K2CO3 as absorbent, is one of the absorption unit which is susceptible to corrosion attack, especially the parts contacting the KHCO3 rich solution. Carbon steel which used to be the construction material of CO2 absorption system, is susceptible to corrosion in K2CO3 + KHCO3 solution with a passivation tendency. The use of passivating inhibitor, especially KVO3, is one of the most popular corrosion prevention method. Experimental results show that 20 g/dm3 KVO3 is effective to inhibit corrosion of carbon steel in K2CO3 + KHCO3 solution at temperature up to 100°C and high turbulence. This passivation is due to the formation of protective layer which consists of Î·-Fe2O3 and FeVO4. Another passivating inhibitor, Na-benzoate, is found to be similarly effective to KVO3 in the same testing conditions. The passive film, formed by the addition Na-benzoate, consists of Î·-Fe2O3 and Fe2(OH)2CO3.

Design, Fabrication, and Testing of Supercapacitor Based on Nanocarbon Composite Material Heri rustamaji Rustamaji; Tirto Prakoso; Hary Devianto; Pramujo Widiatmoko; Isdiriayani Nurdin
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.70139

This research investigates the design, fabrication, and testing of single-cell and module supercapacitors. The supercapacitor consists of carbon nanocomposites, which contain activated carbon (AC), multiwall carbon nanotubes (MWCNT), and graphene (GR). The coin and pouch cell type supercapacitors were manufactured with AC: MWCNT: GR composite electrodes in a ratio of 70:20:10 weight percent. Meanwhile, the electrochemical characterization showed that the highest capacitance values for single coin and pouch cells were 32.13 F g-1 and 5.3 F g-1, respectively, in 6 M KOH electrolyte at a scan rate of 2 mV s-1. Furthermore, the power and energy densities for the coin-cell supercapacitor were 69 W kg-1 and 6.6 Wh kg-1, respectively, while for the pouch cell, it was 7.4 W kg-1 and 1.0 Wh kg-1, respectively. The coin-cell supercapacitor durability test was carried out for 1000 cycles, yielding the retention capacitance and coulombic efficiency values of 94-97% and 100%, respectively. These results showed that the performance of the supercapacitor is close to commercial products.

Performance Evaluation of An Electrolyte-Supported Intermediate-Temperature Solid Oxide Fuel Cell (IT-SOFC) with Low-Cost Materials Fauzi Yusupandi; Hary Devianto; Pramujo Widiatmoko; Isdiriayani Nurdin; Sung Pil Yoon; Tae-Hoon Lim; Aditya Farhan Arif
International Journal of Renewable Energy Development Vol 11, No 4 (2022): November 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.46735

Intermediate temperature solid oxide fuel cell (IT-SOFC) provides economic and technical advantages over the conventional SOFC because of the wider material use, lower fabrication cost and longer lifetime of the cell components. In this work, we fabricated electrolyte-supported IT-SOFC using low-cost materials such as calcia-stabilized zirconia (CSZ) electrolyte fabricated by dry-pressing, NiO-CSZ anode and Ca3Co1.9Zn0.1O6 (CCZO) cathode produced through brush coating technique. According to the XRD result, the monoclinic phase dominated over the cubic phase, and the relative density of the electrolyte was low but the hardness of the CSZ electrolyte was close to the hardness of commercial 8YSZ electrolyte. The performance of the single cell was performed with hydrogen ambient air. An open-circuit voltage (OCV) of 0.43, 0.46, and 0.45 V and a maximum power density of 0.14, 0.50, and 1.00 mW/cm2 were achieved at the operating temperature of 600, 700, and 800 °C, respectively. The ohmic resistance of the cell at 700 and 800 °C achieved 81.5 and 33.00 Ω, respectively due to the contribution of thick electrolyte and Cr poisoning in electrodes and electrolyte

The Effect of Tannin on Carbon Steel Corrosion in Nitric Acid Solutions Anna Sonya Asoka; Listiani Artha; Isdiriayani Nurdin; Hary Devianto
Jurnal Teknologi Bahan dan Barang Teknik Vol 5, No 1 (2015)
Publisher : Center for Material and Technical Product

Carbon steel is commonly used as construction material of processing equipment due to its strength, ease of fabrication, and low cost. Nevertheless, carbon steel is susceptible to corrosion by process fluid, like nitric acid. However, corrosion effect can be reduced by inhibitor addition. Tannin is one of carbon steel corrosion inhibitors in acidic solution. Tannin is an organic compound which has hidroxyl and carboxyl functional groups, decomposed easily, and non-toxic. The aim of this research is to determine the effectiveness of tannin as a corrosion inhibitor for carbon steel in nitric acid solutions. The corrosion rate is determined using the Tafel method, whereas the corrosion mechanism is predicted by cyclic voltammetry. The results showed that tannin is ineffective to inhibit carbon steel corrosion in nitric acid solution. The carbon steel corrosion reaction in nitric acid solution, with or without tannin addition, is reversible, involving single step oxidation-reduction reaction, resulting stable corrosion product, and not forming any passivation. Baja karbon merupakan bahan konstruksi yang sering digunakan untuk peralatan proses karena kuat, mudah difabrikasi, dan harganya relatif murah. Namun, baja karbon tidak tahan terhadap korosi oleh fluida proses seperti asam nitrat. Pencegahan korosi peralatan proses oleh asam nitrat dapat dilakukan dengan cara penambahan inhibitor. Salah satu inhibitor yang dapat menurunkan laju korosi baja karbon adalah tanin. Tanin merupakan senyawa organik yang memiliki gugus hidroksil dan karboksil, mudah terurai, tidak beracun, dan dapat menginhibisi korosi baja karbon di dalam larutan asam. Penelitian ini bertujuan untuk menentukan keefektifan tanin sebagai inhibitor korosi baja karbon di dalam larutan asam nitrat, mengetahui mekanisme inhibisi korosi, serta mengetahui dosis tanin yang diperlukan untuk menurunkan laju korosi baja di dalam larutan asam nitrat hingga suatu nilai yang dianggap tidak berbahaya. Penentuan laju korosi dilakukan dengan metoda Tafel, sedangkan mekanisme korosi diprediksi dengan metoda voltametri siklik. Penelitian yang dilakukan bersifat eksperimental, dengan variabel yang dimanipulasi adalah konsentrasi asam nitrat, dosis tanin, dan temperatur operasi. Berdasarkan hasil pengamatan, didapatkan bahwa tanin tidak efektif digunakan sebagai inhibitor korosi baja karbon di dalam larutan asam nitrat. Proses korosi baja di dalam larutan asam nitrat dengan ataupun tanpa tanin berlangsung dalam satu tahap, secara reversibel, membentuk produk korosi yang stabil, dan tidak cenderung pasif. Penambahan tanin sebanyak 80 ppm hanya sedikit menurunkan arus korosi baja di dalam larutan asam nitrat.

The Effect of Counter Electrode Preparation Methods Toward Dye Sensitized Solar Cell Performance Pramujo Widiatmoko; Hary Devianto; Isdiriayani Nurdin; Adriaan Adriaan; Henry Natanail Purwito
Jurnal Teknologi Bahan dan Barang Teknik Vol 8, No 1 (2018)
Publisher : Balai Besar Bahan dan Barang Teknik

Carbon-coated electrodes is superior substitution for platinum electrodes of Dye-Sensitized Solar Cells (DSSC). This paper describes effect of electrode coating methods as well as carbon types on the performance of DSSC. The electrodes were prepared using 3 methods, i.e. doctor blade, metering rod and bubble deposition. Commercial industrial-grade and medical-grade activated carbon were used in this research. The DSSC performance was measured from I-V curve and electrochemical impedance spectroscopy, meanwhile the morphology of coated carbon electrode was studied from Scanning Electron Microscope and Brunauer-Emmett-Teller analysis. It was found that efficiency of DSSC was higher when the counter electrodes were prepared using doctor blade and bubble deposition methods with medical-grade activated carbon. The highest achievement on light-to-electricity conversion was 3.76%.Elektroda bantu karbon merupakan alternatif pengganti elektroda platinum yang baik untuk aplikasi sel surya tersensitisasi pewarna (Dye-Sensitized Solar Cell, DSSC). Makalah ini menjelaskan pengaruh metode pelapisan elektroda bantu serta jenis karbon pada kinerja DSSC. Elektroda disiapkan menggunakan 3 metode yaitu bilah dokter, batang pengaduk dan pelapisan gelembung. Karbon aktif untuk industri dan medis digunakan dalam penelitian ini. Kinerja DSSC ditentukan berdasarkan data kurva I-V dan spektroskopi impedansi elektrokimia, sementara morfologi lapisan karbon pada elektroda dipelajari menggunakan Scanning Electron Microscope dan analisis Brunauer-Emmett-Teller. Efisiensi DSSC lebih tinggi diperoleh ketika elektroda bantu disiapkan menggunakan metode bilah dokter dan pelapisan gelembung dengan karbon aktif medis. Perolehan tertinggi efisiensi konversi cahaya ke listrik adalah 3,76%.

Pemanfaatan Sistem Hibrid Fotovoltaik – PLN pada Elektrolisis Kontinyu untuk Menghasilkan Hidrogen Pramujo Widiatmoko; Tatto Bustomi; Muhammad Mara Ikhsan; Rizky Eka Ahmad; Isdiriayani Nurdin; Hary Devianto
Jurnal Teknologi Bahan dan Barang Teknik Vol 10, No 2 (2020)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37209/jtbbt.v10i2.184

Produksi hidrogen melalui elektrolisis menggunakan energi matahari sangat potensial di Indonesia, namun terkendala oleh ketidakstabilan penyinaran matahari. Penggunaan sumber listrik konvensional sebagai komplementer dapat mengatasi ketidakstabilan tersebut. Dalam penelitian ini, elektrolisis air dilakukan dalam sel dengan ruang ganda dengan elektrolit larutan KOH 3 M. Variasi dilakukan terhadap jenis dan bentuk elektroda serta laju alir elektrolit. Sumber energi listrik divariasikan dengan sumber listrik konvensional dari PLN, modul fotovoltaik, serta hibrid dari kedua sistem tersebut. Kinerja elektrolisis dianalisis dengan mengukur volum hidrogen yang terbentuk, rapat energi yang dibutuhkan, serta efisiensi arus listrik. Hasil penelitian menunjukkan penggunaan sistem hibrid dapat menstabilkan produksi hidrogen untuk elektrolisis pada tegangan 15 V selama 7 jam operasi. Dibandingkan dengan penggunaan listrik PLN sepenuhnya, sistem hibrid memberikan peluang penghematan energi hingga 81,64%.

Pengaruh Laju Alir Larutan Asam Sitrat terhadap Korosi Aluminium Isdiriayani Nurdin; Pramujo Widiatmoko; Hary Devianto; Ferdyan Ihza Akbar; Tiara Calista Shandy
Jurnal Teknologi Bahan dan Barang Teknik Vol 8, No 2 (2018)
Publisher : Balai Besar Bahan dan Barang Teknik

Corrosion behaviour of alumina in a citric acid solution has been investigated under a dinamic condition of fluid. The corrosion test was conducted using the Rotating Disk Electrode and potentiostat. The citric acid concentration were 2, 3.5 and 5% w/v. The corrosion rates were found to be severe, within the rate of 2.12 – 24.86 mm/year. The corrosion rate under the citric acid concentration of 5% was found lowest due to the formation of passive layer. The corrosion was of a one step irreversible reaction, and the corossion product of Al2O3 was unstable.Penelitian ini bertujuan untuk mengetahui perilaku korosi aluminium dalam larutan asam sitrat pada kondisi fluida dinamis. Pengujian laju korosi dilakukan dengan menggunakan Rotating Disk Electrode (RDE) dan potensiostat. Konsentrasi asam sitrat divariasikan 2%, 3,5% dan 5%–w/v pada rejim aliran transisi dan turbulen. Hasil penelitian menunjukkan laju korosi aluminium yang ganas, dalam rentang 2,12–24,86 mm/tahun. Konsentrasi asam sitrat 5%-w/v memberikan laju korosi aluminium yang lebih rendah akibat pembentukan lapisan pasif. Reaksi korosi yang terjadi bersifat irreversible satu tahap dengan produk korosi berupa Al2O3 yang tidak stabil.

Potency of Solar Hydrogen Generation System in Urban Area: Case Study of Bandung City Pramujo Widiatmoko; Hary Devianto; Isdiriayani Nurdin; Saumi Febrianti Khairunnisa; Muhammad Irfan Rafi
Jurnal Teknologi Bahan dan Barang Teknik Vol 6, No 2 (2016)
Publisher : Balai Besar Bahan dan Barang Teknik

Development of hydrogen production system is important in the future to support electric vehicles operation. This paper studies potency of rooftop PV-PEM electrolyser system connected to fuel station in urban area of Bandung City. Rooftop inclination and orientation of the PV influences the generated electricity by 0.8 – 4.2% compared with horizontal installed-PV. With the solar to hydrogen efficiency of 8.5%, we found that the rooftop installed PV-electrolyser system in Bandung City with supporting area with a radius of 500 m is potentially able to provide fuel for up to a hundred vehicles daily. Further, the potency of rooftop solar hydrogen generation was mapped.Pengembangan sistem produksi hidrogen sangat penting untuk mendukung pengoperasian kendaraan listrik di masa depan. Penelitian ini mempelajari potensi dari pemasangan sistem PV-PEM electrolyser yang terhubung dengan stasiun pengisian bahan bakar di area Kota Bandung. Kemiringan atap dan orientasi panel surya mempengaruhi jumlah energi listrik sebesar 0,8 – 4,2% dari panel surya yang dipasang secara horizontal. Dengan efisiensi solar-to-hydrogen sebesar 8,5%, atap perumahan yang terpasang sistem PV-PEM electrolyser di Kota Bandung dalam radius 500 m dapat menyediakan bahan bakar hingga seratus mobil listrik per hari. Penelitian ini mencakup pula pemetaan potensi produksi solar hydrogen di atap perumahan.

Co-Authors Aditya Farhan A Aditya Farhan Arif Adriaan Adriaan Adriaan Adriaan Adriaan, Adriaan Ananda, Wisnu Anastasia Yuandy Andreas Yoppy Aprianto Prasetya Anies Mutiari Anna Sonya Asoka Dicky Tri Jatmiko Djaenudin Dhaenudin EDWAN KARDENA Fauzi Yusupandi Ferdyan Ihza Akbar Fikri Anggara P Hary Devianto Henry Natanail Purwito Heri Rustamaji Hilham Zamriko Koto Koto, Hilham Zamriko Larisa Deviyani Listiani Artha M. Syahri Mhd Ridho Utomo Mindriany Syafila Mitra Eviani Muhammad Irfan Rafi Muhammad Mara Ikhsan Mutiari, Anies Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko R Asri Pratiwi Rendy Rendy Rennie Sari Ridho Eka Yandra Rizky Eka Ahmad Saumi Febrianti Khairunnisa Sung Pil Yoon Tae-Hoon Lim Tatto Bustomi Tiara Calista Shandy Tirto Prakoso Utomo, Mhd Ridho Widiatmoko, Pramujo Wisnu Ananda Yandra, Ridho Eka

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