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All Journal Reaktor International Journal of Renewable Energy Development TEKNIK Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Widyariset Widyariset Jurnal Teknik Kimia Indonesia Automotive Experiences Indonesia Jurnal Farmasi International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis

Didi Dwi Anggoro

Chemical Engineering Department, Engineering Faculty, Diponegoro University Jl. Prof. Soedarto, SH, Tembalang, Semarang 50239, Telp.(024)7460058

Author-ID : 2537640

Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health

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HIDROLISIS SELULOSA MENJADI GLUKOSA DENGAN KATALIS HETEROGEN ARANG AKTIF TERSULFONASI Didi Dwi Anggoro; Purwanto Purwanto; Rispiandi Rispiandi
Reaktor Volume 15, No.2, OKTOBER 2014
Publisher : Dept. of Chemical Engineering, Diponegoro University

CELLULOCE HYDROLYSIS TO GLUCOSE USING ACTIVE CARBON SULPHONATED HETEROGENOUS CATALYST. Enzimatic process and acid hydrolysis process are common process for conversion of cellulose to glucose. Unfornately, the two processes are expensive process and korosif process. Hence, the new process, that use sulfonaned active carbon catalyst is important to developing. The sulfonated active carbon is made from carbonated coconut sheel under temperature at 350oC. After carbonation, sulfonated active carbon soaked under sulphate acid 96% at 150oC until 15 hours. The result is then washed and dried, and tested catalyst characteristics in the form of H+ capacity, pore size catalysts by used BET surface area, functional groups by used FTIR, and morphology catalyst structure by used SEM. Catalyst performance was tested in an autoclave reactor through a hydrothermal process with difference of the catalyst amount and temperature. The results showed that the test characteristics of H+ capacity is 2.95 mmol/g, the pore size is 29 m2/gr. FTIR analyze showed that the presence of sulfonate groups read at a wavelength of vibration 1750 cm-1 and 1379 cm-1. By SEM analyze showed that the morphological structure of sulfonated active carbon is more open than other catalyst. By testing catalyst, the highest conversion of glucose is 87.2 %. Keywords: cellulose; glucose; sulfonate active carbon; thatch Abstrak Teknologi yang sudah digunakan dalam mengubah selulosa menjadi glukosa adalah dengan proses enzimatik dan hidrolisis asam. Kedua teknologi tersebut masih memiliki kendala teknis, yaitu harga enzim yang mahal, proses yang korosif dan menimbulkan limbah, sehingga diperlukan pengembangan teknologi baru salah satu diantaranya yaitu dengan metode katalis heterogen berupa karbon aktif tersulfonasi. Karbon aktif tersulfonasi ini dibuat dari tempurung kelapa yang dikarbonisasi pada temperatur 350oC, selanjutnya direndam dalam asam sulfat 96% pada temperatur 150oC selama 15 jam. Hasilnya kemudian dicuci dan dikeringkan, dilakukan uji karakteristik dan performance (kinerja ) katalis berupa kapasitas H+, ukuran pori katalis dengan BET, uji gugus fungsi dengan FTIR, dan uji struktur marfologi katalis dengan SEM. Kinerja katalis diuji dalam reaktor autoclave melalui proses hidrotermal dengan mevariasikan jumlah katalis, dan variasi temperatur. Hasil penelitian menunjukkan untuk uji karakteristik kapasitas H+ sebesar 2,95 mmol/gr, untuk uji BET ukuran pori 29 m2/gr , untuk uji FTIR keberadaan gugus sulfonat terbaca pada vibrasi panjang gelombang 1750 cm-1 dan 1379 cm-1 , pada uji SEM struktur morfologi katalis yang lebih terbuka pada karbon aktif setelah proses sulfonasi. Kinerja katalis konversi tertinggi selulosa menjadi glukosa mencapai 87,2% pada jumlah alang-alang 2 gr, jumlah katalis 2 gr, dan temperatur 170oC selama 8 jam. Kata kunci : selulosa; glukosa; karbon aktif tersulfonasi; alang-alang

PROSES GLISEROLISIS MINYAK KELAPA SAWIT MENJADI MONO DAN DIACYL GLISEROL DENGAN PELARUT N-BUTANOL DAN KATALIS MgO Didi Dwi Anggoro; Faleh Setia Budi
Reaktor Volume 12, Nomor 1, Juni 2008
Publisher : Dept. of Chemical Engineering, Diponegoro University

Indonesia merupakan salah satu negara penghasil minyak sawit terbesar di dunia. Lebih dari setengah produksinya digunakan untuk kebutuhan dalam negeri dan sisanya diekspor. Produk turunan minyak sawit seperti Mono-Di Acyl Gliserol (MAG-DAG) mempunyai nilai ekonomi yang tingg dan selama ini Indonesia masih mengimpornya. MAG- DAG dibuat dari senyawa gliserida yang banyak terdapat dalam bahan minyak atau lemak, seperti minyak kelapa sawit, dengan gliserol. Tujuan dari penelitian ini adalah Studi eksperimen produksi MAG-DAG dari minyak kelapa sawit pada suhu rendah (2000C) dengan reaktor batch skala laboratorium, dan mengetahui pengaruh variabel-variabel proses. Variabel berubah yang digunakan adalah suhu (70 oC, 90 oC, dan 110 oC), rasio gliserol/CPO (3, 4, dan 5), dan jumlah katalis (2% w, 3% w, dan 4% w). Sedangkan variabel tetapnya adalah berat total campuran reaksi 300 gram, kecepatan pengadukan 400 rpm, waktu 4 jam dan jumlah pelarut 20 ml/10 gram CPO. Dari hasil pengolahan data menggunakan program STATISTICA 6 diperoleh kondisi operasi optimum dicapai pada suhu sekitar 70-1000C, rasio gliserol/CPO sekitar 3,5-4,5 serta katalis pada kisaran 2,5-4% dengan konversi yang diperoleh sekitar 93-98%. Dengan adanya penambahan pelarut n-Butanol, reaksi dapat dijalankan pada suhu yang lebih rendah (di bawah 2000C) tanpa menurunkan konversi yang diperoleh.

THE OPTIMIZATION OF PRODUCTION ZEOLITE Y CATALYST FROM RHA BY RESPONSE SURFACE METHODOLOGY Didi Dwi Anggoro; Aprilina Purbasari
Reaktor Volume 12, Nomor 3, Juni 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

Rice husk is the milling byproduct of rice and is a major waste product of the agriculture industry. Amorphous silica, commonly referred to as rice husk ash, was extracted from rice husk by acid leaching, pyrolysis, and carbon-removing processes. These properties make the ash a valuable raw material for many industries. This paper is study of synthesized of zeolite Y from rice husk ash. Zeolite Y synthesis is used for petroleum industry as expensive catalyst. Rice husk was calcined at temperature 700oC for two hours using furnace to produce pure silica. The composition of synthesized of zeolite Y from rice husk was 2.24 Na2O:Al2O3:8SiO2:112 H2O. The gel solution was mixed at room temperature for 24 hours using autoclave. Then, the gel solution was heated with variable temperature and time crystallization. The product zeolite synthesis Y was filtered and washed with distilled water until pH lower than ten, than dried at oven. This product was analyzed with X-Ray Diffraction (XRD). From XRD analyze result indicated that from rice husk ash can produced zeolite synthesis Y which high crystallization degree. The optimum conditions for synthesis of zeolite Y from rice husk ash are temperature at 100oC for 48 hours, silicate at 20%, and aluminate at 10%.

PALM KERNEL OIL SOLUBITY EXAMINATION AND ITS MODELING IN EXTRACTION PROCESS USING SUPERCRITICAL CARBON DIOXIDE Wahyu Bahari Setianto; Priyo Atmaji; Didi Dwi Anggoro
Reaktor Volume 14, No. 3, APRIL 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Application of supercritical carbon dioxide (SC-CO2) to vegetable oil extraction became an attractive technique due to its high solubility, short extraction time and simple purification. The method is considered as earth friendly technology due to the absence of chemical usage. Solubility of solute-SC-CO2 is an important data for application of the SC-CO2 extraction. In this work, the equilibrium solubility of the palm kernel oil (PKO) in SC-CO2 has been examined using extraction curve analysis. The examinations were performed at temperature and pressure ranges of 323.15 K to 353.15 K and 20.7 to 34.5 MPa respectively. It was obtained that the experimental solubility were from 0.0160 to 0.0503 g oil/g CO2 depend on the extraction condition. The experimental solubility data was well correlated with a solvent density based model with absolute percent deviation of 0.96. PENENTUAN KELARUTAN MINYAK INTI KELAPA SAWIT DAN PEMODELAN EKSTRAKSI DENGAN KARBON DIOKSIDA SUPERKRITIK. Sehubungan dengan kelarutan yang tinggi, waktu ekstraksi yang pendek dan pemurnian hasil yang mudah, aplikasi karbon dioksida superkritis (SC-CO2) pada ekstraksi minyak nabati menjadi sebuah teknik ekstraksi yang menarik. Karena tanpa penggunaan bahan kimia, metode ekstraksi ini dianggap sebagai teknologi yang ramah lingkungan. Kelarutan zat terlarut pada SC-CO2 merupakan data yang penting dalam aplikasi SC-CO2 pada proses ekstraksi. Pada penelitian ini, kelarutan kesetimbangan dari minyak biji sawit (PKO) dalam SC-CO2 telah diuji dengan mengunakan analisa kurva proses ekstraksi. Pengujian kelarutan tersebut dilakukan pada rentang suhu 323,15 K sampai 353,15 K dan rentang tekanan 20,7 MPa sampai 34,5 MPa. Hasil analisa menunjukkan bahwa kelarutan kesetimbangan hasil percobaan PKO pada SC-CO2 adalah 0.0160 g minyak/g CO2 sampai 0,0503 g minyak/g CO2 tergantung pada kondisi ekstraksi. Data kelarutan kesetimbangan hasil percobaan telah dikorelasaikan dengan baik menggunakan sebuah model kelarutan yang didasarkan pada densiti pelarut. Pemodelan tersebut mempunyai persen deviasi mutlak 0,96.

DEALUMINATION AND CHARACTERIZATION OF ZSM - 5 AS CATALYST FOR GLYCEROL CONVERSION TO GLYCEROL MONOLAURATE Didi Dwi Anggoro; Riko Rikardo Putra; Herawati Oktaviani; Lutfi Af’idatul Kamilah; FatmaTsaniya Chamdani
Reaktor Volume 18 No. 2 June 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Glycerol Monolaurate (GML) is a naturally occurring fatty acid widely utilized in food, cosmetics, andhomeopathic supplements. Glycerol is a compound glycerides, a byproduct of biodiesel production from the transesterification process. Glycerol is converted to glycerol derivative product that has more value as Glycerol Monolaurate (GML).GML is a naturally occurring fatty acid widely utilized in food, cosmetics, andhomeopathic supplements.One of the catalyst that had beenused is ZSM-5. Dealumination is used to change the acidity of the zeolite. This study consists of several stages, there are dealumination of zeolite ZSM-5 using H2SO4, drying at 110 ° C for 1 hour, Then calcination at a temperature of 550 ° C for 4 hours. Characterization catalyst to testing the acidity of the catalyst by absorption of ammonia and pyridine. Acidity of Zeolite is expressed in the mmol of ammonia or pyridine per gram of catalyst. Synthesis of monolaurate with dealuminated result are performed by GC-MS analysis, it’s to determine the molecular weight and to show a purity of Glycerol Monolaurate. Testing results obtained in the optimum conditions at dealumination temperature and dealumination time respectively are 40-60 0C and 2-5 hours. The dealumination variables are acid concentration, temperature and time of dealumination affecting ZSM-5 acidity and % yield of GML. The acidity affecting the yield% of Glycerol monolaurate produced Keywords :Glycerol, Glycerol Monolaurate, dealumination, ZSM - 5.

Co-Authors Afriza Ni'matus Sa'adah Anindita Indriana Anisa Widia Utami Antonio Giovanno Aprilina Purbasari Arif Budiarto Bintang Ayu Kalimantini Cantika Aulia Salsabila Chusnul Khotimah Diah Anggraeni Jatraningrum Dian Cahyaningrum Dyah Hesti Wardhani Dyah Hesti Wardhani Fachmy Adji Pangestu Setiawan Fadhil Rifqi P Faleh Setia Budi Fathoni, Moch Zaenal FatmaTsaniya Chamdani Febio Dalanta Ganish Eko Mayndra Giveni Christina Silaen H Hadiyanto H. Hadiyanto Hartuti Purnaweni Herawati Oktaviani Herawati Oktavianty Hermawan, Hermawan Herry Santosa I. Istadi Indro Sumantri Kamsi Nur Oktavia Kevin Aprilio Luqman B Luqman Buchori Lutfi Af’idatul Kamilah Melissa Justine Renjaan Muhamad, Theobroma Guntur Nerfiana Fradevi Nita A Nita Aryanti Nor Aishah Saidina Amin NUR HIDAYATI Nur Hidayati P Purwanto Pakpahan, Agnes J. Pakpahan, Andre W. S. Priyo Atmaji Putri Anggraeni Resti Nur Utami Riko Rikardo Putra Riko Rikardo Putra Riskatama Atmaji Rispiandi Rispiandi Riyanto, Teguh Rohmadona H S Subandriyo Saputra, Roni Ade Sari Octavianingrum Setia Budi S Setia Budi Sasongko Sigit B Silviana Silviana Slamet Supriyadi Teguh Riyanto Udin Mabruro Wahyu Bahari Setianto Wahyu Bahari Setianto Wibawa, Muhammad Hanif Dzikri Yayuk Astuti Yayuk Mundriyastutik Zaqiyah Addarojah Zulfikar Muriadiputra

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