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All Journal Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Communications in Science and Technology Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Indonesia Makara Journal of Science Molekul: Jurnal Ilmiah Kimia International Journal of Renewable Energy Development
Eddy Heraldy
Department of Chemistry, University of Sebelas Maret, Jl. Ir. Sutami 36A Kentingan Surakarta 57126
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Public Health Social Sciences

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KAJIAN OPTIMASI JUMLAH ADSORBEN DAN WAKTU KONTAK PADA RED 2B OLEH Mg/Al HYDROTALCITE LIKE Heraldy, Eddy; Maruto, Dian; Riasdianti, Irina C
Alchemy Jurnal Penelitian Kimia Vol 6, No 2 (2007)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Telah dilakukan kajian optimasi jumlah adsorben dan waktu kontak pada adsorpsi larutan Red 2B oleh Mg/Al Hydrotalcite-like (Mg/Al-HTlc). Optimasi dilakukan dengan menggunakan Mg/Al-HTlc yang telah dibuat dengan nisbah mol awal antara Mg/Al masing-masing 2,5; 3,0 dan 3,5 pada pH 5,0. Hasil optimasi dari variasi jumlah adsorben adalah 0,025 gram, sedangkan dari variasi waktu kontak adalah 2 jam pada nisbah mol Mg/Al 2,5. Kalsinasi berpotensi meningkatkan kemampuan adsorpsi dan dalam penelitian ini.
ALUMINASI FELDSPAR PADA TANAH ABU VULKANIK (TAV) DENGAN LARUTAN ALUMINIUM KLORIDA HEKSAHIDRAT Heraldy, Eddy; Widjonarko, Dian Maruto; Saputro, Sigit Wiwiet
Alchemy Jurnal Penelitian Kimia Vol 3, No 2 (2004)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Telah dilakukan aluminasi feldspar pada Tanah Abu Vulkanik (TAV) gunung Lawu dengan menggunakan larutan aluminium klorida heksahidrat 0,1 M. Aluminasi dilakukan pada suhu 30, 50, 70 dan 90oC masing-masing selama 6 jam. Perlakuan kalsinasi terhadap sampel sebelum dan sesudah aluminasi dilakukan selama 6 jam pada 550oC.Hasil penelitian menunjukkan bahwa proses aluminasi feldspar pada suhu 30, 50, 70 dan 90oC tidak cukup berpengaruh. Difraktogram menunjukkan bahwa struktur sampel pada suhu aluminasi 30oC dan 90oC masih tetap di pertahankan sebagai mineral feldspar dengan kristalinnitas yang semakin meningkat.
SYNTHESIS OF Mg/Al HYDROTALCITE-LIKE FROM BRINE WATER AND ITS APPLICATION FOR METHYL ORANGE REMOVAL: A PRELIMINARY STUDY Heraldy, Eddy; Triyono, Triyono
Makara Journal of Science Vol. 15, No. 1
Publisher : UI Scholars Hub

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Abstract

The objective of this research is to synthesis of Mg/Al hydrotalcite-like (Mg/Al HTlc) from brine water and its application as a methyl orange (MO) removal. The research initiated with the synthesis of Mg/Al HTlc from brine water, which is well known as the desalination process wastewater. Characterization of the Mg/Al HTlc synthesized was confirmed through X-ray Diffraction and FT-IR Spectroscopy. The determination of optimum acidity, adsorption rate, and energy and capacity adsorption were studied. The result showed that pH 4 was the optimum acidity for the adsorption of MO on Mg/Al HTlc. MO was adsorbed at pseudo-second order adsorption rate of 1.03 × 105 g mol-1 min-1 on the Mg/Al HTlc. The adsorption data fitted well into the linearly transformed Freundlich equation.
The Role of The Ni/HZSM-5 Ratio on The Anisole Hydrodeoxygenation Reaction Nugrahaningtyas, Khoirina Dwi; Nurcahyo, I F; Hidayat, Yuniawan; Rahmawati, Fitria; Fadlulloh, Zaki; Heraldy, Eddy; Qurrotul'aini, Nisriina 'Abidah
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.11105

Abstract

ABSTRACT. Bio-oil is a renewable energy source with high oxygen levels, and anisole is a chemical widely employed in research to represent it. Catalytic hydrodeoxygenation (HDO) reduces the oxygen content. A catalyst known as nickel-modified HZSM-5 has shown promising results for HDO. Meanwhile, catalyst efficiency depends on the Ni/HZSM-5 ratio. So, this study aims to determine how the Ni/HZSM-5 ratio influences the catalyst's properties, activity, and selectivity in anisole HDO. The Ni/HZSM-5 catalyst was made using the wet impregnation method with various ratios of Ni/HZSM-5. The catalysts were analyzed for their morphology using scanning electron microscopy-energy-dispersive X-ray (SEM-EDX). The diffraction patterns were studied using X-ray diffraction (XRD). Surface area and porosity were determined through gas sorption analysis (GSA). Then, the acidity strength was evaluated via temperature-programmed ammonia desorption (NH3-TPD). The characterization results show Ni was successfully impregnated and distributed evenly in HZSM-5 without changing the primary structure. Adding Ni metal to HZSM-5 increases the surface area of the catalyst but reduces its acid strength. The catalytic performance of the catalysts was then evaluated in a flow reactor at 400 °C, using 15 mL/min H2 gas. The liquid products of the reaction were analyzed using gas chromatography-mass spectroscopy (GC-MS). The results of the catalytic performance show that Ni4.5/HZSM-5 has the highest catalytic activity in anisole conversion. At the same time, Ni6.4/HZSM-5 shows the highest selectivity towards benzene-toluene-xylene (BTX). Keywords: Hydrodeoxygenation, nickel, anisole, heterogeneous catalyst, acidity.
STRATEGI DIGITAL MARKETING PADA HASIL KERAJINAN BORDIR PAYET DI DESA SIDOWARNO, WONOSARI, KLATEN Safitri, Rosi Nur; Athoillah, Muhammad Ibnu; Wati, Nori Laras; Budianto, Anantasya Indah; Maharani, Salsabila; Listiani, Nofa Eka; Subarno, Alga Amolu; Anas, Dimas Fauzi; Liestyabudi, Adelia Pebrina; Heraldy, Eddy
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 (2023): Volume 4 Nomor 6 Tahun 2023
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v4i6.19681

Abstract

Bordir payet merupakan salah satu kerajinan yang digunakan sebagai pelengkap keindahan busana. Payet berupa manik-manik dirangkai satu per satu sampai menghasilkan suatu pola tertentu untuk memperindah busana. Bordir payet merupakan salah satu produk kerajinan dari Desa Sidowarno yang memiliki potensi besar, tetapi sebagian besar pengrajin melakukan pemasaran masih secara konvensional sehingga penjualan tidak dapat maksimal. Pada era digitalisasi ini, pemasaran bisa lebih efektif sesuai dengan perkembangan zaman. Oleh karena itu, Tim PPK Ormawa SIM UNS melaksanakan program pengabdian Di Desa Sidowarno dengan tujuan memberikan pendampingan terkait strategi digital marketing guna meningkatkan pemasaran hasil kerajinan bordir payet. Berdasarkan observasi dan wawancara kepada pengrajin payet Di Desa Sidowarno, tim melakukan analisis untuk solusi yang dapat diberikan. Para pengrajin dikumpulkan dalam sebuah kelompok usaha yang bernama Kelompok Bordir Payet Cahaya Berdikari. Kemudian, tim memberikan fasilitas guna pengembangan digital marketing, yaitu melalui pembuatan akun Shopee dan Instagram guna realisasi pemasaran produk secara online. Dengan demikian, penjualan produk kerajinan payet lebih meningkat. Selain itu, dengan adanya koordinasi promosi satu pintu dari kelompok maka tidak terjadi ketimpangan dan persaingan harga antar pengrajin.
Dual metal NiMo dispersed on silica derived from rice husk ash as a catalyst for hydrocracking of used palm cooking oil into liquid biofuels Wijaya, Karna; Setyono, Risandrika Dwijayanti Putri; Pratika, Remi Ayu; Heraldy, Eddy; Suseno, Ahmad; Hakim, Lukman; Tahir, Iqmal; Oh, Won-Chun; Saviola, Aldino Javier
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1480

Abstract

The production of vegetable-based fuels has intensified in recent years due to the decreasing availability of fossil fuels and their environmental impacts. This study explores the synthesis, characterization, and application of nickel-molybdenum (NiMo) bimetal-dispersed silica catalysts for converting used palm cooking oil into liquid biofuels. The catalysts were synthesized using the wet impregnation method, incorporating Ni and Mo metals at concentrations of 1, 2, and 3% by weight of silica derived from rice husk ash. Impregnation of the silica with Ni and Mo metals increased its acidity, with the NiMo/SiO? 2 catalyst exhibiting the highest acidity value of 4.34 mmol/g. This catalyst also demonstrated the largest specific surface area and total pore volume, measured at 205.51 m²/g and 0.88 cm³/g, respectively. Hydrocracking of used palm cooking oil into liquid biofuels was performed at an optimum temperature of 450 °C with catalyst-to-feed weight ratios of 1:100, 2:100, and 3:100 for 1 h by hydrogen gas supply of 20 mL/min. Catalyst activity tests revealed the highest mass percentage of liquid product, 23.3%, at a ratio of 1:100 (w/w), with a biofuel yield of 20.34%, comprising 14.20% gasoline and 6.14% diesel. By utilizing biomass waste as both a catalyst and feedstock, this study presents a sustainable approach to reducing the carbon footprint and promoting environmental balance.
N/S-doped carbon electrode derived from paper waste as a sustainable electric double-layer capacitor Rahmawati, Fitria; Aini, Nur; Ridwan, Qanita; Paramartha, I Gusti Ayu Filia; Putri, Denis Octareta Amelia; Saputri, Dini Deviana; Nugrahaningtyas, Khoirina Dwi; Heraldy, Eddy; Hidayat, Yuniawan; Nurcahyo, I. F.; Anggraningrum, Ivandini Tribidasari
International Journal of Renewable Energy Development Vol 14, No 3 (2025): May 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60846

Abstract

This research aims to produce N/S-doped Carbon Electrode derived from paper waste (NSCEp) for Electric Double-Layer Capacitor (EDLC). The paper waste holds potential as raw material for carbon production because of its high cellulose content, abundance of availability, and low price. To enhance the electrical performance of the carbon, an activation step was conducted, followed by double doping with nitrogen and sulfur using thiourea. The NSCEp result was analysed to examine its specific diffraction peaks, crystallinity, morphology, and elemental contents. The NSCEp powder was then mixed with dispersant to produce a homogeneous slurry for the electrode film. The EDLC was assembled in a sandwich-like structure, with sodium hydroxide (NaOH) solution impregnated in a separator between the carbon film electrodes. The EDLC assembly was conducted under an argon atmosphere in a CR2032 coin cell. The results found that the NSCEp provides a high electrical conductivity of 1.21 x 102 S/cm. The prepared EDLC achieved the specific capacitance value of 39.555 F/g as determined by cyclic voltammetry (CV) analysis. Furthermore, the EDLC demonstrates high initial charge-discharge capacities of 300.56 mAh/g and 248.88 mAh/g, respectively, at a current of 0.015 A/g. The capacity remains stable for up to 300 charge-discharge cycles.
Pelatihan Keselamatan Bahan Gas Berbahaya Untuk Teknisi Mesin Pendingin Nurcahyo, I F; Heraldy, Eddy; Rahmawati, F; Nugrahaningtyas, Khoirina D; Hidayat, Yuniawan
Jurnal Pengabdian Masyarakat Indonesia Vol 4 No 1 (2024): JPMI - Februari 2024
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpmi.2031

Abstract

Pelatihan keselamatan bahan gas berbahaya untuk teknisi mesin pending telah dilaksanakan untuk teknisi mesin pendingin yang tergabung dalam paguyuban Aneka Jasa Teknik Surakarta (AJTS). Kecelakaan kerja berkaitan dengan gas freon banyak diberitakan di dunia maya. Paguyuban AJTS merupakan perkumpulan dari teknisi yang banyak berkecimpung sebagai teknisi mesin pendingin terutama AC, kulkas, dan freezer di Solo Raya. Pelatihan ini penting untuk dilakukan untuk membekali teknisi tersebut agar selamat dalam perakitan dan perbaikan mesin pendingin. Pelatihan ini dilaksanakan secara luring meliputi ceramah keselamatan bahan, praktek mengenal MSDS, dan praktek mendeteksi kebocoran gas freon menggunakan alat leaking detektor. Hasil pelatihan antara lain: peserta paham tentang bahaya gas freon dan pencegahan kecelakaan kerja dalam penanganan mesin pendingin. Pelatihan sangat bermanfaat bagi teknisi mesin pendingin terutama peserta pelatihan dan pembaca artikel ini, sehingga keselamatan kerja dapat tercapai.
The Impact of pH Preparation on the Physical Nature and Metal Phase of Zeolite-Supported Metal Catalyst Nugrahaningtyas, Khoirina Dwi; Budiman, Anatta Wahyu; Sabiila Gusti, Aji Indo; Heraldy, Eddy; Hidayat, Yuniawan
Jurnal Riset Kimia Vol. 15 No. 2 (2024): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v15i2.678

Abstract

The synthesis of CoMo/USY catalysts has been widely carried out. However, the bond strength between metal and USY is still a problem. Therefore, this research has synthesised the catalyst with the chelating agent ethylenediaminetetraacetate (EDTA). Apart from that, the effect of pH on the characteristics of the catalyst is also reviewed. This research aims to analyse the effect of preparation pH on catalyst characteristics. In the preparation process, the pH of the solution is set at values of 2, 7, and 8. Catalyst activation includes a calcination process and reduction. The catalyst characterisation uses XRD, GSA, and FTIR instruments to determine phase composition, specific surface area, and functional groups. The result showed that pH preparation significantly influenced the metal loading on the catalyst and reached a maximum at pH 8. The surface area is not directly related to the pH of the preparation but has the opposite property depending on the amount of metal added. Meanwhile, it was found that the CoO and MoO3 phases were achieved on the catalyst by all pH preparations. On the other hand, the CoMo alloys are present on the catalyst at pH 7 and 8, while the Co and Mo elements are visible at pH 2. The difference in pH during the synthesis process impacts the shift in the absorption wave number of the OH vibration.
Co-Authors Ahmad Suseno Anas, Dimas Fauzi Athoillah, Muhammad Ibnu Budianto, Anantasya Indah Budiman, Anatta Wahyu Dian Maruto Widjonarko Dian Maruto, Dian Fadlulloh, Zaki Fitria Rahmawati I F Nurcahyo, I F Iqmal Tahir Irina C Riasdianti, Irina C Ivandini Tribidasari Anggraningrum Karna Wijaya Khoirina Dwi Nugrahaningtyas Liestyabudi, Adelia Pebrina Listiani, Nofa Eka Lukman Hakim Maharani, Salsabila Nugrahaningtyas, Khoirina D Nur Aini Nurcahyo, I. F. Oh, Won-Chun Paramartha, I Gusti Ayu Filia Putri, Denis Octareta Amelia Qurrotul'aini, Nisriina 'Abidah Rahmawati, F Remi Ayu Pratika Ridwan, Qanita Sabiila Gusti, Aji Indo Safitri, Rosi Nur Saputri, Dini Deviana Saviola, Aldino Javier Setyono, Risandrika Dwijayanti Putri Sigit Wiwiet Saputro, Sigit Wiwiet Subarno, Alga Amolu Triyono Triyono Wati, Nori Laras Yuniawan Hidayat