Research on engineering catalyst for conversion energy, rubber and battery recycling.
EDUCATION
Master of Science (M.Sc), Chemistry Science, Universitas Gadjah Mada
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Chemistry, Physical and Theoretical Chemistry, Renewable Energy, Sustainability and the Environment, Polymers and Plastics
24
Scopus Publications
332
Scholar Citations
8
Scholar h-index
6
Scholar i10-index
Scopus Publications
Regeneration of Spent Bleaching Earth by Calcination and Its Morphological Enhancement via KOH Impregnation Ika Kusuma Nugraheni, Jaka Darma Jaya, Nuryati Nuryati, Sunardi Sunardi, Utami Irawati, et al. Indonesian Journal of Chemistry, 2026 Spent bleaching earth (SBE), a waste generated from palm oil bleaching, contains residual oil and organic matter that block its pore structure and pose environmental disposal concerns. Regeneration of SBE is therefore essential to enable its reutilization. In this study, SBE was regenerated by calcination and further modified via KOH impregnation at concentrations of 1.00, 0.10, and 0.01 M. The regenerated materials were characterized using XRF, SEM, TEM, XRD, and BET surface area analysis. Calcination combined with 0.10 M KOH impregnation increased the surface area from 8.70 to 93.81 m2/g, approaching the value of activated bleaching earth (94.29 m2/g), and significantly altered pore volume and pore size distribution. These findings indicate that calcination restores the basic structure of SBE, while subsequent KOH impregnation enhances its morphological properties, highlighting the potential of regenerated SBE as a low-cost adsorbent or catalyst support.
Effect of Catalyst Bed Arrangement on the Conversion of Processed Palm Oil into Bio-Jet Fuel Using Co/ZSM-5 Catalyst Pangestu Arum Pratiwi, Triyono Triyono, Wega Trisunaryanti, Adyatma Bhagaskara, Dita Adi Saputra Indonesian Journal of Chemistry, 2026 The growing demand for sustainable aviation fuels has driven the development of efficient catalyst materials. This study aimed to investigate the physicochemical properties of the Co/ZSM-5 catalyst, evaluate the effect of catalyst bed arrangement (single- and double-bed configurations) on catalytic performance, and assess its reusability for converting processed palm oil into bio-jet fuel. The catalyst was analyzed using XRD, FTIR, Raman, SAA, NH3-TPD, XPS, and SEM-EDX instruments. The experiment was conducted in a semi-batch reactor equipped with a dual furnace. The hydrotreatment process was carried out at temperatures ranging from 200 to 550 °C with an H2 flow rate of 20 mL/min for 3 h. The liquid product was analyzed by GC-MS and FTIR, while the spent catalyst was characterized by SEM-EDX mapping. The results showed that the catalyst exhibited good crystallinity, a moderate surface area, a suitable pore structure, strong acidity, and a stable cobalt dispersion. Catalyst activity tests revealed bio-jet fuel yields of 48.17% for the single-bed Co/ZSM-5 catalyst and 51.74% for the double-bed arrangement, highlighting the significant influence of bed arrangement effect on product yield and selectivity. After three reusability cycles, both single- and double-bed Co/ZSM-5 catalysts demonstrated consistent yields with relatively stable selectivity.
Synergistic NiS/CuO heterostructures as two-in-one catalysts for dye removal and bacterial inactivation LP Hastuti, AH Budiman, OP Arjasa, DD Ristiana, MD Gumelar, ... International Journal of Environmental Analytical Chemistry 106 (3), 603-622 , 2026 2026 Citations: 4
Valence State-Dependent Catalytic Behavior of Ni and Co in NiCo/Activated Carbon Derived from Spent Li-ion Batteries for Biojet Fuel Production A Bhagaskara, W Trisunaryanti, K Wijaya, AM Tazkia, DA Saputra, ... Journal of the Indian Chemical Society, 102413 , 2026 2026 Citations: 3
Investigation of Reaction Mechanism in Selective Citric Acid Leaching of Ni and Co from NMC Cathodes via Real Time Raman Spectroscopy and RSM Optimization A Bhagaskara, DA Saputra, W Trisunaryanti, K Wijaya, K Rozana, ... Journal of the Indian Chemical Society, 102410 , 2026 2026 Citations: 3
Effect of Catalyst Bed Arrangement on the Conversion of Processed Palm Oil into Bio-Jet Fuel Using Co/ZSM-5 Catalyst PA Pratiwi, T Triyono, W Trisunaryanti, A Bhagaskara, DA Saputra Indonesian Journal of Chemistry , 2026 2026 Citations: 1
Development of sulfuric acid-modified alumina-pillared bentonite for enhanced catalytic conversion of ethanol into diethyl ether P Wahyuningsih, AS Hutama, AJ Saviola, WC Oh, S Sagadevan, L Hauli, ... Vacuum, 114965 , 2025 2025
Leveraging nanocomposites of cobalt-nitrogen co-doped-titania immobilized on zirconia as a visible-light active photocatalyst for malachite green and phenol photodegradation A Syoufian, R Afifah, IN Astuti, AJ Saviola, RA Fitria, ES Kunarti, ... Vacuum, 114823 , 2025 2025
Modification of mesoporous zirconia using phosphoric acid and calcium oxide as a bifunctional nano-catalyst for one-pot conversion of used palm cooking oil into biodiesel EC Sambara, AJ Saviola, A Syoufian, RA Fitria, A Mumtaziyah, K Rozana, ... Next Materials 9, 101147 , 2025 2025 Citations: 3
Upcycling secondary nickel from spent nickel-manganese-cobalt (NMC) batteries as a nanocatalyst on sulfated natural zeolite for converting LDPE plastic waste into jet-fuel … A Bhagaskara, K Wijaya, W Trisunaryanti, DA Saputra, A Agustanhakri, ... Next Materials 9, 101107 , 2025 2025 Citations: 4
Oxidative desulfurization of dibenzothiophene in model fuel using spray impregnated-biogenic silica-supported molybdenum oxide catalyst K Wijaya, D Ariningtyas, AJ Saviola, S Sudiono, MAU Absor, WC Oh, ... Vacuum, 114736 , 2025 2025
Performance comparison of molybdenum-impregnated sulfated mesoporous silica catalysts by spray and wet impregnation in transforming used palm cooking oil into bio-jet fuel AJ Saviola, MF Vebryana, W Wangsa, P Prastyo, A Syoufian, DA Saputra, ... Chemistry Africa 8 (4), 1539-1556 , 2025 2025 Citations: 4
NATURAL ZEOLITE ACTIVATION AND ZAA/Ni CATALYST SYNTHESIS USING THE WET IMPREGNATION METHOD: AKTIVASI ZEOLIT ALAM DAN SINTESIS KATALIS ZAA/Ni MENGGUNAKAN METODE IMPREGNASI BASAH ER Hutami, E Budi, S Husin, DA Saputra, MD Gumelar Joint Prosiding IPS dan Seminar Nasional Fisika 13 , 2025 2025
Fixing cobalt metal onto mordenite through spray impregnation and its evaluation as a catalyst in transforming used coconut cooking oil into bio-jet fuel AJ Saviola, K Wijaya, A Syoufian, MF Vebryana, W Anggraeni, K Rozana, ... Communications in Science and Technology 9 (2), 356-365 , 2024 2024 Citations: 5
Efficient conversion of used palm cooking oil into biogasoline over hydrothermally prepared sulfated mesoporous silica loaded with NiMo catalyst K Wijaya, S Ramadhani, AJ Saviola, N Prasetyo, S Gea, L Hauli, AK Amin, ... Results in Engineering 24, 103185 , 2024 2024 Citations: 6
Recycling of nickel metal from spent nickel-manganese-cobalt (NMC) cathode batteries using H3PO4–H2C2O4 solution combination as an efficient leaching agent A Bhagaskara, DA Saputra, AJ Saviola, K Wijaya, WC Oh, S Rahayu, ... Case Studies in Chemical and Environmental Engineering 10, 100844 , 2024 2024 Citations: 18
Mass Balance of Nickel Manganese Cobalt Cathode Battery Re-cycle Process S Handayani, WI Shahril, I Ismojo, S Rahayu, YA Andrameda, ... Journal of Bioresources and Environmental Sciences 3 (3), 161-165 , 2024 2024 Citations: 4
MgO/γ-Alumina and CaO/γ-Alumina Catalysts for The Transesterification of Castor Oil (Ricinus communis) into Biodiesel DA Saputra, AK Amin, K Wijaya, T Triyono, W Trisunaryanti, ... Iranian Journal of Chemistry and Chemical Engineering , 2024 2024 Citations: 7
Karakterisasi Mekanik Adhesive Bonding Carbon Fiber Laminate-Alumunium WTRI UTAMI, RD Mayasari, DA Saputra, OPA Putra Technopex 2024 , 2024 2024
Quaternary layered double hydroxides from spent battery as electrocatalysts for the oxygen evolution reaction A Hermawan, NSR Kinasih, R Radiana, A Nursyahid, S Rahayu, ... International Journal of Hydrogen Energy 89, 254-263 , 2024 2024 Citations: 9
Performance of hydrothermally prepared NiMo dispersed on sulfated zirconia nano-catalyst in the conversion of used palm cooking oil into jet fuel range bio-hydrocarbons K Wijaya, AJ Saviola, AK Amin, MF Vebryana, A Bhagaskara, HA Ekawati, ... Bulletin of Chemical Reaction Engineering & Catalysis 19 (2), 361-371 , 2024 2024 Citations: 11
Utilization of laboratory glove waste for fuel production through pyrolysis-hydrocracking consecutive process catalyzed by sulfated Indonesian natural zeolite W Wangsa, AJ Saviola, K Wijaya, A Bhagaskara, L Hauli, DA Saputra Reaction Kinetics, Mechanisms and Catalysis 137 (3), 1495-1514 , 2024 2024 Citations: 9
MOST CITED SCHOLAR PUBLICATIONS
Influence of carbon black and silica filler on the rheological and mechanical properties of natural rubber compound IM Ulfah, R Fidyaningsih, S Rahayu, DA Fitriani, DA Saputra, DA Winarto, ... Procedia Chemistry 16, 258-264 , 2015 2015 Citations: 133
Utilization of chitosan as coating material in making NPK slow release fertilizer MD Gumelar, M Hamzah, AS Hidayat, DA Saputra, I I Macromolecular Symposia 391 (1), 1900188 , 2020 2020 Citations: 41
Hydroconversion of used palm cooking oil into bio-jet fuel over phosphoric acid-modified nano-zirconia catalyst AJ Saviola, K Wijaya, A Syoufian, WD Saputri, DA Saputra, ITA Aziz, ... Case Studies in Chemical and Environmental Engineering 9, 100653 , 2024 2024 Citations: 21
Recycling of nickel metal from spent nickel-manganese-cobalt (NMC) cathode batteries using H3PO4–H2C2O4 solution combination as an efficient leaching agent A Bhagaskara, DA Saputra, AJ Saviola, K Wijaya, WC Oh, S Rahayu, ... Case Studies in Chemical and Environmental Engineering 10, 100844 , 2024 2024 Citations: 18
Preparation and characterization of hard rubber and soft rubber for marine rubber fender DA Saputra, S Husin, MD Gumelar, N Aisah, H Susanto, RI Admi, ... Macromolecular symposia 391 (1), 1900189 , 2020 2020 Citations: 15
Performance of hydrothermally prepared NiMo dispersed on sulfated zirconia nano-catalyst in the conversion of used palm cooking oil into jet fuel range bio-hydrocarbons K Wijaya, AJ Saviola, AK Amin, MF Vebryana, A Bhagaskara, HA Ekawati, ... Bulletin of Chemical Reaction Engineering & Catalysis 19 (2), 361-371 , 2024 2024 Citations: 11
Quaternary layered double hydroxides from spent battery as electrocatalysts for the oxygen evolution reaction A Hermawan, NSR Kinasih, R Radiana, A Nursyahid, S Rahayu, ... International Journal of Hydrogen Energy 89, 254-263 , 2024 2024 Citations: 9
Utilization of laboratory glove waste for fuel production through pyrolysis-hydrocracking consecutive process catalyzed by sulfated Indonesian natural zeolite W Wangsa, AJ Saviola, K Wijaya, A Bhagaskara, L Hauli, DA Saputra Reaction Kinetics, Mechanisms and Catalysis 137 (3), 1495-1514 , 2024 2024 Citations: 9
MgO/γ-Alumina and CaO/γ-Alumina Catalysts for The Transesterification of Castor Oil (Ricinus communis) into Biodiesel DA Saputra, AK Amin, K Wijaya, T Triyono, W Trisunaryanti, ... Iranian Journal of Chemistry and Chemical Engineering , 2024 2024 Citations: 7
Efficient conversion of used palm cooking oil into biogasoline over hydrothermally prepared sulfated mesoporous silica loaded with NiMo catalyst K Wijaya, S Ramadhani, AJ Saviola, N Prasetyo, S Gea, L Hauli, AK Amin, ... Results in Engineering 24, 103185 , 2024 2024 Citations: 6
Effect of bonding agent ratio on mechanical and physical properties of natural rubber compounds for rubber to textile adhesion applications AS Hidayat, DK Arti, WT Utami, SA Azahra, M Anggaravidya, DA Saputra, ... Engineering and Applied Science Research 50 (1), 82-91 , 2023 2023 Citations: 6
Chrom / Nanocomposite ZrO 2 - Pillared Bentonite Catalyst for Castor Oil (Ricinus communis) Hydrocracking K Wijaya, A Syoufian, A Fitroturokhmah, W Trisunaryanti, D Adi Saputra, ... Nano Hybrids and Composites 27, 31-37 , 2019 2019 Citations: 6
Fixing cobalt metal onto mordenite through spray impregnation and its evaluation as a catalyst in transforming used coconut cooking oil into bio-jet fuel AJ Saviola, K Wijaya, A Syoufian, MF Vebryana, W Anggraeni, K Rozana, ... Communications in Science and Technology 9 (2), 356-365 , 2024 2024 Citations: 5
Synergistic NiS/CuO heterostructures as two-in-one catalysts for dye removal and bacterial inactivation LP Hastuti, AH Budiman, OP Arjasa, DD Ristiana, MD Gumelar, ... International Journal of Environmental Analytical Chemistry 106 (3), 603-622 , 2026 2026 Citations: 4
Upcycling secondary nickel from spent nickel-manganese-cobalt (NMC) batteries as a nanocatalyst on sulfated natural zeolite for converting LDPE plastic waste into jet-fuel … A Bhagaskara, K Wijaya, W Trisunaryanti, DA Saputra, A Agustanhakri, ... Next Materials 9, 101107 , 2025 2025 Citations: 4
Performance comparison of molybdenum-impregnated sulfated mesoporous silica catalysts by spray and wet impregnation in transforming used palm cooking oil into bio-jet fuel AJ Saviola, MF Vebryana, W Wangsa, P Prastyo, A Syoufian, DA Saputra, ... Chemistry Africa 8 (4), 1539-1556 , 2025 2025 Citations: 4
Mass Balance of Nickel Manganese Cobalt Cathode Battery Re-cycle Process S Handayani, WI Shahril, I Ismojo, S Rahayu, YA Andrameda, ... Journal of Bioresources and Environmental Sciences 3 (3), 161-165 , 2024 2024 Citations: 4
Pengaruh Variasi HA-TCP (Hydroxy Apatit-Tricalcium Pospat) Terhadap Biokomposit (HA: TCP)-Gelatin-CMC Sebagai Injectable Bone Subtitute (IBS) G Purwiandono, H Julita, DA Saputra INDONESIAN JOURNAL OF CHEMICAL RESEARCH, 24-30 , 2018 2018 Citations: 4
Valence State-Dependent Catalytic Behavior of Ni and Co in NiCo/Activated Carbon Derived from Spent Li-ion Batteries for Biojet Fuel Production A Bhagaskara, W Trisunaryanti, K Wijaya, AM Tazkia, DA Saputra, ... Journal of the Indian Chemical Society, 102413 , 2026 2026 Citations: 3
Investigation of Reaction Mechanism in Selective Citric Acid Leaching of Ni and Co from NMC Cathodes via Real Time Raman Spectroscopy and RSM Optimization A Bhagaskara, DA Saputra, W Trisunaryanti, K Wijaya, K Rozana, ... Journal of the Indian Chemical Society, 102410 , 2026 2026 Citations: 3