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All Journal VALENSI Reaktor Jurnal Ilmu Dasar IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Sains dan Teknologi Jurnal Bahan Alam Terbarukan Journal of Mathematical and Fundamental Sciences Alchemy Jurnal Penelitian Kimia Jurnal Zeolit Indonesia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Akta Kimia Indonesia Chemistry Indonesian Journal of Chemical Research QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Walisongo Journal of Chemistry Automotive Experiences Makara Journal of Science Sewagati International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis

Didik Prasetyoko

Institut Teknologi Sepuluh Nopember

Author-ID : 345527

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Pengaruh Suhu Fusi Terhadap Pembentukan Zeolit A Dari Abu Layang Batubara Paiton: Kapasitas Penukar Kation (Ca2+) Tri wahyuni; Suprapto Suprapto; Didik Prasetyoko
Akta Kimia Indonesia Vol 1, No 1 (2016)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Pada penelitian ini, zeolit A berhasil disintesis dari abu layang batubara Paiton melalui metode pemisahan magnetik untuk memisahkan besi (Fe) dilanjutkan dengan fusi menggunakan NaOH untuk mengaktivasi Si dan Al, ekstraksi Si dan Al dan tahap akhir adalah kristalisasi. Varisasi suhu fusi dilakukan pada range 400, 450, 500, 550, 600 dan 650 °C. Rasio gel yang digunakan yaitu Si/Al = 1,64. Kristalisasi dilakukan pada suhu 100 °C selama 3 jam. Padatan yang terbentuk dikarakterisasi menggunakan X-ray diffraction (XRD), spektroskopi infra merah (FTIR) dan penentuan kapasitas penukar kation (Ca2+). Berdasarkan hasil karakterisasi XRD dan FTIR menunjukkan bahwa zeolit A murni terbentuk pada suhu fusi 450 °C adapun pada suhu fusi 400, 500, 550 °C terbentuk zeolit A dan faujasit dan pada suhu 600, 650 °C terbentuk fasa amorf. Berdasarkan penentuan kapasitas penukar kation (CBC) didapatkan hasil terbesar pada produk hasil sintesis di suhu fusi 450 °C sebesar 448,19 meq/100 g

Adsorpsi Pb2+ menggunakan Sodalit dari Kaolin Bangka Belitung Meyga Evi Ferama Sari; Suprapto Suprapto; Didik Prasetyoko
Akta Kimia Indonesia Vol 5, No 1 (2020)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Sodalit merupakan salah satu jenis zeolit yang secara umum memiliki komposisi Na8[Al6Si6O24](X)2, dimana X adalah anion monovalent. Sintesis sodalit dari kaolin Bangka Belitung telah dilakukan dengan menggunakan komposisi rasio molar x Na2O : 2 SiO2 : Al2O3 : 128 H2O, dimana x merupakan variasi alkalinitas dengan rasio sebesar 10, 20, 30, dan 40. Produk sodalit dihasilkan pada variasi alkalinitas 10 (S-10), 20 (S-20), dan 30 (S-30) lalu diuji aktivitas adsorpsinya terhadap Pb2+. Berdasarkan hasil uji aktivitas adsorpsi untuk ion Pb2+ diketahui bahwa sampel dengan ukuran partikel yang paling kecil memiliki kapasitas adsorpsi paling tinggi (S-10). Jumlah Pb2+ yang teradsorp untuk sample S-10, S-20, dan S-30 berturut turut sebesar 651,10; 517,30; dan 527,30 mg/g.

PENGARUH PENAMBAHAN SURFAKTAN PADA MODIFIKASI MATERIAL ALAM Tri Esti Purbaningtias; Puji Kurniawati; Bayu Wiyantoko; Didik Prasetyoko; Suprapto Suprapto
Akta Kimia Indonesia Vol 4, No 2 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Penelitian ini berkaitan dengan pengembangan bahan alam dari zeolit alam, sekam padi dan ampas tebu. Modifikasi bahan alam dilakukan dengan menggunakan cetyltrimethyllammonium bromide (CTAB) sebagai surfaktan kationik untuk templat mesopori. Karakter fisikokimia bahan alam yang termodifikasi dan tanpa modifikasi diselidiki dengan menggunakan XRF, XRD, FTIR, fisisorpsi nitrogen, dan SEM-EDX. Kandungan utama dari bahan alam adalah Silika (Si) yang dibuktikan dari analisis XRF. Analisis XRD menunjukkan bahwa modifikasi dengan penambahan surfaktan dapat menyebabkan penurunan kristalinitas zeolit alam dan ampas tebu, sedangkan kristalinitas sekam padi meningkat. Munculnya pita serapan spesifik pada hasil karakterisasi menggunakan FTIR menunjukkan adanya gugus silanol dan siloksan pada semua material yang membuktikan bahwa semua jenis material alam tersebut merupakan material ekonomis yang kaya akan silika. Sementara itu profil fisisorpsi nitrogen memberikan informasi bahwa modifikasi pori oleh surfaktan hanya berhasil pada ampas tebu. Morfologi bahan alam yang dimodifikasi dan tidak dimodifikasi serta komposisi kimia dari partikel ditunjukkan oleh SEM-EDX.

Cyclic Acetalization of Furfural on Porous Aluminosilicate Acid Catalysts Hartati Hartati; Didik Prasetyoko; Mardi Santoso
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

Porous aluminosilicate materials included microporous and mesoporous ZSM-5, hierarchical aluminosilicates, and mesoporous aluminosilicate were tested for acetalization of furfural (furan-2-carbaldehyde) with propylene glycol. The existing synthesis methods for aluminosilicate and ZSM-5 were modified to produce aluminosilicate material with hierarchical porous structure. Catalytic activity in acetalization of furfural by propylene glycol were conducted by refluxed of the mixture of furfural, propylene glycol and catalyst, using toluene as solvent and nitrobenzene as internal standard, at 106 °C for 4 h. The result showed that a combination of two structure directing agents, tetrapropylammonium hydroxide (TPAOH) and cetyltrimethylammonium bromide (CTAB) and modification of catalytic crystallization produced an active aluminosilicate framework that provides a wide access for a bulky reactants and strong acid sites to catalyze the reaction. The pore structure and the strength of the Brønsted acid sites were crucial for the high conversion of furfural to produce a cyclic acetal.

Calcium Oxide from Limestone as Solid Base Catalyst in Transesterification of Reutealis trisperma Oil Suprapto Suprapto; Tikha Reskiani Fauziah; Meiske S Sangi; Titie Prapti Oetami; Imroatul Qoniah; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 16, No 2 (2016)
Publisher : Universitas Gadjah Mada

CaO catalysts were synthesized from limestone by thermal decomposition and coprecipitation methods. The CaO and MgO reference catalysts were also synthesized for comparison. The catalysts were characterized by X-ray diffractometer (XRD) and the analysis result was refined by Rietica software. CaO catalyst obtained by coprecipitation method has higher purity of CaO and lower MgO content than those of calcined CaO. The catalysts were also characterized by Fourier Transform Infrared (FTIR) spectroscopy. FTIR spectra showed that the catalysts can be easily hydrated and carbonated in air. The catalytic activity of the catalyst was studied in transesterification reaction of Reutealis trisperma (Kemiri Sunan) oil with methanol. Transesterification reaction was carried out at oil to methanol molar ratio 1:1 and 1% of catalyst at 60 °C for 2 h. Catalytic activity of CaO catalyst obtained by coprecipitation was higher than calcined CaO. The methyl ester yield obtained from synthesized CaO, CaO from coprecipitation, calcined CaO, and synthesized MgO catalysts were 56.13; 37.74; 15.97; and 3.61%, respectively.

Biodiesel Production from Waste Palm Oil Catalyzed by Hierarchical ZSM-5 Supported Calcium Oxide Yusuf Muhammad Zein; Anil Kumar Anal; Didik Prasetyoko; Imroatul Qoniah
Indonesian Journal of Chemistry Vol 16, No 1 (2016)
Publisher : Universitas Gadjah Mada

Biodiesel production from waste palm oil catalyzed by hierarchical ZSM-5 supported calcium oxide was studied. The activity of CaO increased after supported on h-ZSM-5 resulting an increase in conversion from 93.17% to 95.40%. A maximum conversion of 95.40% was achieved at 6 h reaction time, 3 wt.% catalyst amount, 12:1 methanol to oil molar ratio and 65 °C reaction temperature. The waste palm oil showed a high potential as a feedstock in biodiesel production in which there was no significant different in the conversion of fresh and waste palm oil. The properties of the obtained biodiesel required the limits of biodiesel specification according to ASTM D6751-08 and EN 14214 with the methyl ester content of 97.18%, the acid value of 0.24 mg KOH/g, the kinematic viscosity of 4.64 cSt and the density of 869.9 kg/m3.

Condensation of Indole with Isatin over AlCl3/Mesoporous Aluminosilicate Tri Esti Purbaningtias; Didik Prasetyoko; Hasliza Bahruji; Yusuf Muhammad Zein; Sugeng Triwahyono; Arief Fadlan; Imroatul Qoniah
Indonesian Journal of Chemistry Vol 15, No 1 (2015)
Publisher : Universitas Gadjah Mada

Aluminium chloride immobilized on mesoporous aluminosilicate was investigated as catalysts in the condensation of isatin with indole. AlCl3/mesoporous aluminosilicate (AlCl3/AM) catalysts were prepared by impregnation of 1, 5, 10 and 15 wt% AlCl3 on the surface of mesoporous aluminosilicate. A maximum conversion of isatin was achieved using 15% AlCl3/AM catalyst whereas the highest selectivity of 68.97% towards trisindoline was obtained using pure AM. The activity of the catalysts was depended on their acid site number and surface area. The number of Brønsted acid and the surface area affected to the conversion of isatin while the total acidity and the number of Lewis acid influenced the selectivity.

CATALYTIC PERFORMANCES OF Fe2O3/TS-1 CATALYST IN PHENOL HYDROXYLATION REACTION Didik Prasetyoko; Cholifah Endah Royani; Hamzah Fansuri; Zainab Ramli; Hadi Nur
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

Hydroxylation reaction of phenol into diphenol, such as hydroquinone and catechol, has a great role in many industrial applications. Phenol hydroxylation reaction can be carried out using Titanium Silicalite-1 (TS-1) as catalyst and H2O2 as an oxidant. TS-1 catalyst shows high activity and selectivity for phenol hydroxylation reaction. However, its hydrophobic sites lead to slow H2O2 adsorption toward the active site of TS-1. Consequently, the reaction rate of phenol hydroxylation reaction is tends to be low. Addition of metal oxide Fe2O3 enhanced hydrophilicity of TS-1 catalyst. Liquid phase catalytic phenol hydroxylation using hydrogen peroxide as oxidant was carried out over iron (III) oxide-modified TS-1 catalyst (Fe2O3/TS-1), that were prepared by impregnation method using iron (III) nitrate as precursor and characterized by X-ray diffraction, infrared spectroscopy, nitrogen adsorption, pyridine adsorption, and hydrophilicity techniques. Catalysts 1Fe2O3/TS-1 showed maximum catalytic activity of hydroquinone product. In this research, the increase of hydroquinone formation rate is due to the higher hydrophilicity of Fe2O3/TS-1 catalysts compare to the parent catalyst, TS-1.

Alumina Extraction from Red Mud by Magnetic Separation Suprapto Suprapto; Zahrotul Istiqomah; Eko Santoso; Ahmad Anwarud Dawam; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

Alumina extraction from red mud has been investigated by magnetic separation with three-step treatment. First, the addition of red mud with Na2CO3 (12 wt%) and heated at 110 °C for 4 h. The second step was carbon reduction using coal with mass ratio of (red mud+Na2CO3) : coal was 1:3 then roasted at temperature of 850, 950, and 1050 °C for 1, 2, and 3 h. The third step was magnetic separation. The magnetic separation was carried out in order to remove magnetite produced during roasting process. Magnetic and non-magnetic phases obtained were characterized by XRD and SEM-EDX techniques. The non-magnetic phase obtained was leached using HCl 6 M, and then aluminum content was determined by Inductively Coupled Plasma (ICP). The result revealed that the highest aluminum oxide extracted from the red mud was 20.66 wt% obtained by roasting at temperature of 1050 °C for 2 h.

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent Eka Putra Ramdhani; Tri Wahyuni; Yatim Lailun Ni’mah; Suprapto Suprapto; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

Mines in Bintan were producing bauxite for many years. The production process of bauxite to alumina produced much red mud. From X-ray Fluorescence (XRF), alumina content on Bintan’s red mud was 28.87 wt.%. This research was studying on the extraction alumina from red mud with reduction of hematite (Fe2O3) and desilication processes. After extraction process alumina was collected about 52.89 wt.%. Synthesis of mesoporous alumina from red mud using sol-gel method at the room temperature for 72 h with cetyltrimethylammonium bromide (CTABr) as mesoporous directing agent. The CTABr/Al-salt ratio, i.e. 1.57; 4.71 and 7.85 with the sample code of AMC-1, AMC-3, AMC-5, respectively. The product was calcined at 550 °C for 6 h. The synthesized materials were characterized by X-ray Diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), transmission electron microscopy (TEM), and N2 adsorption-desorption techniques. XRD pattern of AMC-1, AMC-3, and AMC-5 showed that all synthesized materials have amorphous phase. The morphology were wormhole aggregate that were showed by SEM and TEM characterization. N2 adsorption-desorption characterization showed the distribution of pore size of about 3.2 nm. The highest surface area and pore volume were obtained in solid-solid ratio CTABr/GM-AL by 1.57 (AMC-1) i.e. 241 m2/g and 0.107 cm3/g, respectively.

Co-Authors Abdul Hamid Abdul Hamid Abdul Hamid Abdulloh Abdulloh Adi Setyo Purnomo Afifah Rosidah Afifah Rosyidah Ahmad Anwarud Dawam Ahmad Anwarud Dawam Ahmad Anwarud Dawam Ahmad, Shahrul Nizam Aishah Abdul Jalil Aishah Abdul Jalil Aishah Abdul Jalil Aishah Abdul Jalil Alfa Akustia Widati Alya Awinatul Rohmah Amalia Putri Purnamasari Amin Jakfar, S.T.,M.T., Lukman Hadiwijaya, S.T.,M.T. Amirul Mukminin Anil Kumar Anal Anis Farika Anis Farika, Anis Arief Fadlan Arizal Firmansyah Asranudin Asranudin, Asranudin Badzlin Nabilah Bayu Wiyantoko Cepi Kurniawan Che Ku Nor Liana Che Ku Hitam Cholifah Endah Royani Cicik Herlina Yulianti Desy T. Kusumaningtyas Desy Tri Kusumaningtyas Dety Oktavia Sulistiono Dewi, Nita Safira Didi Dwi Anggoro Djoko Hartanto Djoko Hartanto Djoko Hartanto Dyah Ayu Fatmawati Dyah Fitasari Eka Pratiwi Yuniarti Eka Putra Ramdhani Eko Santoso Endang Purwanti Endud, Salasiah F Widhi Mahatmanti Farhanah Thalib Fensia Analda Souhoka Firda, Putri Bintang Dea Futri Wulandari H. Holilah Hadi Nur Hadi Nur Hadi Nur Hamzah Fansuri Haq, Ismi Arinal Harjito - Harjito Harjito Harmami Harmami Hartati Hartati Hartati Hartati Hasliza Bahruji Hasliza Bahruji Hasliza Bahruji Hasliza Bahruji Hellna Tehubijuluw Hendro Nurhadi Ika Diah Rahmawati Ike Dayi Febriana Imroatul Qoniah Imroatul Qoniah Imroatul Qoniah Imroatul Qoniah Imroatul Qoniah Imroatul Qoniah Izzah, Adiba Naila Kris Murwani, Irmina Kurniawati, Puji Kurniawati, Puji Kusumawati, Yuly Le Monde, Brilliant Umara Leaw Wai Loon Lely Dwi Astuti Lisa Amalia Suryana Lukman Atmaja Mardi Santoso Maria Ulfa Maria Ulfa Maria Ulfa Meiske S Sangi Meyga E. F. Sari Meyga Evi Ferama Sari Mohammad Abdullah Mudasir Mudasir Muhammad Lukman Hakim Muhammad Nur Kholis Muhammad Nur Kholis Mulyatun Mulyatun Naimatul Khoiroh Nanik Siti Aminah Nanik Wijayati Neneng Ayunanda Novesar Jamarun Nuni Widiarti Nur, Hadi Nurdiani, Maulida Nurul - Widiastuti Pemta Tiadeka Puji Kurniawati Qurrota A’yuni R.Y. Perry Burhan, R.Y. Perry Rahayu, Endah Fitriani Rakhmadi Harsanto Ramli, Zainab Ratna Ediati Ratna Ediati Reva Edra Nugraha Safa Annissa Novianti Salasiah Endud Samuel Budi Wardhana Samuel Budi Wardhana Kusuma Santi Wulan Purnami Sirly Bifadilatur Romaniyah Siti Maryam Subagyo, Riki Suci Indrayani Sugeng Triwahyono Sugeng Triwahyono Sugeng Triwahyono Sugeng Triwahyono Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto, Suprapto Suprapto, Surapto Susi Nurul Khalifah Syafsir Akhlus Syafsir Akhlus, Syafsir Tanti Kartika Dewi Taufiq Rinda Alkas Teguh Endah Saraswati Tikha Reskiani Fauziah Titie Prapti Oetami Titie Prapti Oetami Tri Ana Mulyati Tri Esti Purbaningtias Tri wahyuni Tri Wahyuni Tri Wahyuni Triyono Triyono Triyono Triyono Wahyu Bambang Widayatno Wega Trisunaryanti Wega Trisunaryanti Wega Trisunaryanti Wijianto, Wijianto Wiyantoko, Bayu Wiyantoko, Bayu Yatim Lailun Ni’mah Yoshifumi Chisaki Yulinar Dwi Nur Azizah Yusuf Muhammad Zein Yusuf Muhammad Zein Yuvita Eka Pertiwi Zahrotul Istiqomah Zainab Ramli Zainab Ramli Zainab Ramli Zainab Ramli Zakaria, Zaki Yamani Zeni Rahmawati Zetra, Yulfi

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