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All Journal Jurnal Rekayasa Proses Jurnal Sains dan Teknologi CHEMICA Jurnal Teknik Kimia IJOG : Indonesian Journal on Geoscience Seminar Nasional Teknik Kimia Kejuangan Program Kreativitas Mahasiswa - Kewirausahaan Journal of Tropical Biodiversity and Biotechnology Journal of Geoscience, Engineering, Environment, and Technology Metal Indonesia Indonesian Journal of Chemistry Buletin Sumber Daya Geologi Jurnal Rekayasa Proses Prosiding Seminar Nasional Sains dan Teknologi Terapan Metalurgi INSIST (International Series on Interdisciplinary Research) International Journal of Applied Sciences and Smart Technologies ASEAN Journal of Chemical Engineering Indonesian Journal on Geoscience Indonesian Journal on Geoscience REACTOR : Journal of Research On Chemistry And Engineering ARTCHIVE: Indonesia Journal of Visual Art and Design Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Proceeding ISETH (International Summit on Science, Technology, and Humanity) Metalurgi Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses
Himawan Tri Bayu Murti Petrus
Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada, Jl Grafika No. 2 Kampus UGM, Yogyakarta, 55281
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Jurnal rekayasa proses submission update Petrus, Himawan Tri Bayu Murti
Jurnal Rekayasa Proses Vol 17, No 2 (2023)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.92642

Abstract

Pembaruan informasi pengumpulan Jurnal Rekayasa Proses Petrus, Himawan Tri Bayu Murti
Jurnal Rekayasa Proses Vol 17, No 2 (2023)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.92643

Abstract

Low-Grade Ilmenite Leaching Kinetics Using Hydrochloric Acid: RSM and SCM Approaches Supriyatna, Yayat Iman; Prasetya, Agus; Astuti, Widi; Sumardi, Slamet; Natalia, Priskila; Adythia, Dicky Marsa; Petrus, Himawan Tri Bayu Murti
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.79092

Abstract

Minerals containing TiO2 are common in Indonesia, such as ilmenite in iron sand deposits scattered along the country's coasts. Ilmenite is an important source of titanium. One method for making TiO2 from ilmenite is by solubilizing both the Fe and Ti elements in HCl and then immediately hydrolyze the Ti. The leaching of low-grade ilmenite (ground to 0.177-0.149 mm) is studied kinetically by HCl in a stirred reactor. The research was conducted using the caustic fusion method followed by HCl leaching. The leaching reaction kinetics at the optimum conditions are analyzed using response surface methodology (RSM) with a second-order polynomial equation model and SSE with the shrinking core model (SCM). The results showed that HCl concentration and leaching time were directly proportional to the leached titanium concentration. In contrast, the leaching temperature was inversely proportional. The optimum operating conditions were obtained at a temperature of 30 °C, 9 M HCl, and 120 min of leaching time. The shrinking core model is a better representation of the kinetics than RSM with a second-order polynomial equation model. Based on SCM, the rate of the leaching reaction of titanium from low-grade ilmenite is controlled by diffusion through the ash layer.
Electrocoagulation in Wastewater from Spent-Batteries Recycling Mufakhir, Fika Rofiek; Khotimah, Chusnul; Oediyani, Soesaptri; Astuti, Widi; Sumardi, Slamet; Prasetia, Hendra; Arham, La Ode; Hakim, Hafid Zul; Petrus, Himawan Tri Bayu Murti; Poernomo, Venny
Indonesian Journal of Chemistry Vol 24, No 4 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93262

Abstract

This study uses electrocoagulation to investigate reducing heavy metal content in wastewater from discharging spent batteries. ICP-OES analysis shows that heavy metals exceed the environmental water standard. The electrocoagulation procedure was conducted within a reactor with a 500 mL volume and a rectifier with a 5 A current capacity. Three types of electrode material combinations were used: iron (Fe) and aluminium (Al) as well as Fe-Fe, Al-Al, and Fe-Al pairs with 1 cm in the distance by parallel monopolar cells. Alternating current was used with 30, 40, and 50 A/m2 current density. The best result shown in the Fe-Al electrode pair combination system at 40 A/m2 for 30 min contact time and removal efficiencies for Co, Cd, Ni, Zn, and As is 98.76, 90.73, 99.32, 97.93, and 97.78%, respectively, while for Hg it is 31.84%, even though only Cd is above the standard limit. The heavy metal bearing was confirmed using SEM-EDS in the floc and the precipitate residue. The dissolved electrode materials and electrical energy consumed are 0.32 g and 0.109 kWh/m3, respectively. This method can be a good alternative for treating wastewater compared to direct current electrocoagulation, where the electrode and energy will be less consumed.
Kinetics and Thermodynamics Study of Ammonia Leaching on Spent LMR-NMC Battery Cathodes Perdana, Indra; Rahman, Muhammad Irfan; Aprilianto, Doni Riski; Petrus, Himawan Tri Bayu Murti; Kinanti, Divita Hayyu
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93312

Abstract

The recycling of spent lithium NMC-type batteries, widely used in electric vehicles, presents a challenge due to manganese content, which complicates metal separation and purification. This study explored a selective leaching process using ammonia to recover metals from high-manganese-content LMR-NMC cathodes. By adjusting the (NH4)2SO4 reagent concentration to 1–2 M and maintaining the temperature between 50–80 °C, the recovery rates of lithium, nickel and cobalt metals were enhanced, leaving manganese primarily as residue in the form of Mn(OH)₂ and (NH4)2Mn(SO4)2. A kinetics model, integrating an equilibrium-shrinking core model with a modified temperature-dependent Arrhenius approach, accurately simulates the metal recovery. The activation energies of the forward leaching reactions of Li, Ni, and Co were respectively (1.4331±0.0036)×105, (1.5494±0.0034)×105, and (1.5743±0.0040)×105 J/mol, while those for the backward reactions were (5.3307±0.0041)×105, (2.4753±0.0093)×105, and (1.6289±0.0092)×105 J/mol, respectively. The leaching mechanism was found to be exothermic, which allows maximum recovery at low temperatures. The findings highlight ammonia’s effectiveness as a selective leachant, significantly reducing manganese in the leaching solution, and streamlining nickel and cobalt separation, thus enhancing the recycling process’s efficiency and sustainability.
SYNTHESIS AND CHARACTERISTIC OF NANOSILICA FROM GEOTHERMAL SLUDGE: EFFECT OF SURFACTANT Adiatama, Aufa Rai; Susanti, Ratna Frida; Astuti, Widi; Petrus, Himawan Tri Bayu Murti; Wanta, Kevin Cleary
Metalurgi Vol 37, No 2 (2022): Metalurgi Vol. 37 No. 2 Agustus 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1467.999 KB) | DOI: 10.14203/metalurgi.v37i2.637

Abstract

In the synthesis of nanoparticles, the phenomenon of agglomeration is an undesirable condition because the particles formed can be larger. The use of surfactants can prevent the occurrence of this phenomenon. In this study, the use of surfactants was studied in the synthesis of nanosilica from geothermal sludge. The method applied in the synthesis of nanosilica is the sol-gel method. A 1 M sodium hydroxide (NaOH) solution was used to prepare the sol phase, while the gel phase was prepared at pH 5 using a 1.5 M hydrochloric acid (HCl) solution. The surfactants used were alkyl benzene sulfonate (ABS), cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and polyvinylpyrrolidone (PVP). The surfactant added to the precursor solution was at the critical micelle concentration (CMC), where the CMC values for each surfactant were 0.15, 0.05, 0.50, and 1.00 wt% for ABS, CTAB, SDS, and PVP, respectively. The experimental results showed that the synthesis of nanosilica without surfactant could produce the product with a purity of 98.03%. Even though the purity is already high, the resulting product experiences agglomeration and surfactants were needed to minimize the occurrence of agglomeration in the product. The surfactant that gives the best product quality is PVP, where the particle size is in the range of 2.01–3.65 nm. However, the product produced with this PVP has a low purity, 56.67%. It is because the sodium chloride (NaCl) is trapped in the surfactant template.
Application of Palm Solid Waste Ash as A Ceramic Glazing Material Suprabanindya, Caecilia Tridjata; Petrus, Himawan Tri Bayu Murti; Hazmi, Fariz Al
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.20083

Abstract

The aim of this research is to develop a glaze from palm oil solid waste ash. Oil palm plants were chosen because the ash of palm fronds, stems and trees have not been utilized optimally, only used as organic fertilizer and material for making furniture. This research is applied research involving expertise in the field of fine arts, especially ceramic art and chemical engineering, with an inquiry-based research approach. Laboratory tests (EDX Report) were carried out so that the process of modifying the ash glaze formula could be carried out more accurately. The output of this research is the palm oil solid waste ash glaze formula/recipe and ash analysis table along with test pieces of ash glaze trial results and ceramic work prototypes. In practice, organic ash cannot be used alone, but must be mixed with other ingredients so that it can potentially be processed into glaze. The glaze formula used in this research contains different mixtures of ingredients. In this research, organic ash was mixed with soil (Sukabumi and Kebumen) and ready-to-use frit glaze (F.107 and F.3T). Next, the ash glaze is burned at cone temperatures 5 and 6 (1150 0C–1200 0C). The test piece material used is Sukabumi clay which has been proven to be compatible with the oil palm plant ash glaze formula, resulting in a more varied, attractive, artistic and unique visual appearance of the work.
Nickel recovery from nickel-containing spent catalyst using atmospheric leaching and oxalate precipitation Widi Astuti; Yuniati, Mutia Dewi; Yuda, Aulia Pertiwi Tri; Sumardi, Slamet; Dewi, Jilda Sofiana; Wanta, Kevin Cleary; Petrus, Himawan Tri Bayu Murti
Jurnal Rekayasa Proses Vol 19 No 2 (2025): Volume 19, Number 2, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.17589

Abstract

A study has been done to investigate and optimize the recovery of nickel from nickel-containing spent catalyst through sulfuric acid (1 - 2 mol/L) atmospheric leaching in different operation conditions. From the leaching experiments, it was possible to extract 77.95% nickel under the conditions of 2 mol/L H2SO4, reaction time of 5 h, 5% pulp density, and temperature of 80°C. In the next step Ni was selectively precipitated from a sulfuric acid-leached solution using 1 mol/L oxalic acid. The nickel content in the product was 97.29% Ni. Based on the study, sulfuric acid was found to be a suitable leaching agent to extract Ni from the nickel-containing spent catalyst. The study also indicated the effective extraction and recovery of nickel which was well supported by characterization studies using XRD technique.
Pengaruh kalsinasi terhadap karakteristik mesoporous nanosilica (MSN) dari sludge geothermal dan performanya dalam sistem drug loading kurkumin Angelia, Annasthasya Milleni; Ramadhany, Putri; Kristijarti, Anastasia Prima; Astuti, Widi; Petrus, Himawan Tri Bayu Murti; Wanta, Kevin Cleary
Jurnal Rekayasa Proses Vol 19 No 2 (2025): Volume 19, Number 2, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.20154

Abstract

This study was conducted to study the effect of calcination on the characteristics of mesoporous nanosilica (MSN) from sludge geothermal waste and its performance in drug loading curcumin. The preparation of MSN was carried out using the sol-gel method using polyvinylpyrrolidone (PVP) surfactant. The removal of surfactants from MSN was processed using the calcination method, where the muffle furnace was adjusted at a temperature of 600oC for 7 hours. The formed MSN samples were then characterized using XRF, XRD, FTIR, and BET instruments. Meanwhile, the adsorption capacity of MSN to curcumin before and after calcination was measured using a 600 ppm curcumin solution. This drug loading process lasted for 6 hours at room temperature. The study's results showed that MSN's composition and crystallinity structure did not change significantly due to the calcination process. However, the functional groups of MSN changed after calcination. The pore size of MSN after calcination also decreased from 4.31 (before calcination) to 4.02 nm. This change in MSN characteristics also affects the performance of curcumin drug loading. This can be seen based on the efficiency of curcumin adsorption, where calcined MSN can adsorb curcumin by 32.92%, while for uncalcined MSN, the adsorption efficiency is 25.64%. Based on the results of this study, the calcination process has a positive effect on the drug loading ability of MSNs.
Peningkatan jumlah paper tiap edisi Jurnal Rekayasa Proses Petrus, Himawan Tri Bayu Murti
Jurnal Rekayasa Proses Vol 17 No 1 (2023): Volume 17, Number 1, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.86317

Abstract

Seiring peningkatan kesadaran untuk berbagi informasi dan berkontribusi di bidang rekayasa proses baik dari peneliti dan perekayasa industri, terindikasi peningkatan jumlah paper yang masuk di Jurnal Rekayasa Proses. Memberikan ruang dan kesempatan yang seluas luasnya untuk semua stakeholder, maka Jurnal Rekayasa Proses pada terbitan volume 17(1) menambahkan jumlah paper yang akan terbit menjadi 15 paper untuk setiap edisi. Dengan meningkatkan jumlah paper per edisi, kami berharap dapat mendorong inklusivitas dan kolaborasi lintas disiplin ilmu. Kami yakin bahwa terobosan dan sudut pandang baru akan muncul di persimpangan berbagai bidang keilmuan yang diakomodasi oleh Jurnal Rekayasa Proses. Bersama-sama, mari kita tembus batas pengetahuan menghasilkan integrasi bidang keilmuan, membangkitkan kolaborasi, dan mempercepat kemajuan ilmiah. Terima kasih atas dukungan para peneliti dan perekayasa industri yang terus menerus, dan kami dengan antusias menantikan kontribusi para stakeholder saat kami memulai babak baru dalam perjalanan penerbitan jurnal kami.
Co-Authors Achmad Roesyadi Adha Priyawan, Adha Adiatama, Aufa Rai Adythia, Dicky Marsa Agus Haerudin Agus Prasetya Agus Prasetya Ahmad Tawfiequrrahman Yuliansyah Akbar Yulandra Althea Farina Atmaja, Althea Farina Anastasia Prima Kristijarti Andi Nurfaadilah Ulfah Angelia, Annasthasya Milleni Anis Kristiani, Anis Aprilianto, Doni Riski Ardyanto Wijaya Arham, La Ode Arifudin Idrus Arini Nur Utami Asih, Yekti Aulia Pertiwi Tri Yuda Bahri, Elsha Pamida Bangun, Aya Shika Bratakusuma, Danu Bratakusuma, Danu BUDI SETIADI DARYONO Christopher Mario Hananto Chusnul Khotimah Cipta Panghegar Supriadi D Bratakusuma Dagus Resmana Djuanda Danu Bratakusuma Danu Bratakusuma Dea Anisa Ayu Besari Devi, Fatma Putrinta Dewi Purnama Sari Dewi Purnama Sari Dewi, Jilda Sofiana Dwi Umi Siswanti Dwi Wiji Lestari Edward Yonathan Natapraja Eko Agus Suyono Elsha Pamida Bahri Fahrurozi, Mohammad Fajar Nurjaman Fajar Nurjaman Fathan Bahfie Febry Yulindra Abdi Saputra Federick Dwi Putra Federick Dwi Putra Felisha Hapsari Tanujaya Felisha Hapsari Tanujaya Felix Arie Setiawan Ferian Anggara Fika Rofiek Mufakhir Fika Rofiek Mufakhir Fika Rofiek Mufakir Fika Rofiek Mufakir Fika Rofieq Mufakhir Franky Michael Hamonangan Siagian Gelar Panji Gemilar Gelar Panji Gemilar Gemilar, Gelar Panji Gyan Prameswara Hafid Zul Hakim Halomoan Siagian Harta Haryadi, Harta Hazmi, Fariz Al Heimbach, Ivano Hendrik Setiawan Hendrik Setiawan, Hendrik Himmah Sekar Eka Ayu Agustina Hotden Manurung Hotden Manurung I Gde Sukadana I Made Bendiyasa I Wayan Christ Widhi Herman Tangkas I Wayan Warmada Iga Trisnawati Iga Trisnawati Indra Perdana Indra Perdana Indra Perdana Indra Perdana Istihanah Nurul Eskani Ivanna Crecentia Narulita Simanungkalit Jayawarsa, A.A. Ketut Jonas Kristanto Joni Setiawan Kevin Cleary Wanta Kinanti, Divita Hayyu Kristanto, Jonas Kurniawansyah, Firman Laksono Trisnantoro Marizka Aviana Permatasari Mita Kusumaningrum, Mita Mufakhir, Fika Rofiek Mufakhir, Fika Rofieq Muhammad Miftahur Rahman Mustika, Pra Cipta Buana Wahyu Nadya Fardani, Nadya Nasution, Yogi Tri Putra Natalia, Priskila Patria, Aulia Agus Perbawati, Esti Kukuh Poernomo, Venny Pratiwi, Fadiah Putra, Agik Dwika Putra, Ilham Satria Raditya Radinda Bian Zaqina, Radinda Bian Rahman, Muhammad Irfan Rahman, Muhammad Miftahur Ramadhany, Putri Ratna Frida Susanti Rika Ernawati Riyadi, Delfimelinda Nurul RR. Ella Evrita Hestiandari Salafudin Salafudin, Salafudin Shinta Virdhian Shinta Virdhian shinta virdhian, shinta Siagian, Franky Michael Hamonangan Simanungkalit, Ivanna Crecentia Narulita Siti Nurul Aisyiyah Jenie, Siti Nurul Aisyiyah Slamet Sumardi Slamet Sumardi Slamet Sumardi, Slamet Soesaptri Oediyani Stephen Lim Stevanus Adi Darma Sujoto, Vincent Sutresno Hadi Supit, Jance Mudjani Suprabanindya, Caecilia Tridjata Supriadi , Cipta Panghegar Supriyatna, Yayat Iman Surianti Surianti Suryanaga, Chandra Edward Suryanaga, Edward Chandra Sutijan Sutijan Sutijan Sutijan Sutopo, Ulung Syamsumin Syamsumin, Syamsumin Takeishi, Kaoru Tampubolon, Aron Pangihutan Christian Tangkas, I Wayan Christ Widhi Herman Taufik Hery Purwanto Timotius, Daniel Trisnawati, Iga Ulfah , Andi Nurfaadilah Ulin Herlina Ulung Sutopo Utama, Andhika Putera Utomo, Dimas Bagus Galih Vincent Sutresno Hadi Sujoto Wahyu Rachmi pusparini Wahyu Yun Santoso Wibowo, Decka Pynka Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widi Astuti Widya Rosita Wijaya, Ardyanto Wiratni Wiratni Wiratni Wiratni, Wiratni Y Iskandar Yogi Tri Putra Nasution Yuda, Aulia Pertiwi Tri Yuni Kusumastuti, Yuni Yuniati, Mutia Dewi Yusuf Iskandar