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All Journal Reaktor Indonesia Chimica Acta Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Majamecha Equilibrium Journal of Chemical Engineering COVIT Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences KOLONI Jurnal Kimia dan Rekayasa Jurnal Teknologi Kimia Mineral Jurnal Ilmiah Teknik dan Sains (JITS)
Dian Ranggina
Politeknik Negeri Ujung Pandang
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Application of Subcritical Water Hydrolysis (SCW) in Producing Reducing Sugar for Biofuel Production Dian Ranggina; Maria Assumpta Nogo Olea; Hanny F. Sangian; Arief Widjaja; Hijrah Amaliah Azis
Equilibrium Journal of Chemical Engineering Vol 8, No 2 (2024): Volume 8, No 2 December 2024
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v8i2.86196

Abstract

Abstract. This work aimed to produce reducing sugar from coconut husk using subcritical water hydrolysis. Coconut husk contains cellulose and hemicellulose that can be converted into reducing sugars and then fermented into biofuel. In this study, the subcritical water hydrolysis was carried out in a batch reactor at  temperatures 120-260 oC and pressures, 40, 80, and 160 bar for 1 h. Subcritical water method obtained two products, namely (a) liquid containing sugar and (b) solid containing cellulose, hemicellulose and lignin. The liquid sugars were analyzed by HPLC and DNS, while crystal structure was characterized by XRD and SEM. The highest yield of reducing sugar obtained was 0.25 g/g cellulose+ hemicellulose at 150 oC and 80 bar.Keywords: Biofuel, Coconut husk, Lignocellulose, Reducing sugar, Subcritical water
Preparation and Characteristics of Kluwak Shell Carbon Adsorbent Yuliani HR; Dian Ranggina; Miftahul Janna; Zulham Nurul Fadhila; Arif Budiman
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 9, No 1 (2024): EDISI MARET 2024
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v9i1.5171

Abstract

Kluwak shell carbon (KTK) is a biomass with potential as an adsorbent, containing cellulose, hemicellulose, lignin, and fixed carbon at a content of 92.15%. However, the current utilization of KTK in adsorbing free fatty acids and methylene blue is limited and can be improved through thermal activation at a range of temperatures. The study aims to investigate the impact of activation temperature on CEC by examining the adsorption capacity of methylene blue solution, iodine solution, and surface area. Activation was carried out for 2 hours at temperatures ranging from 500 to 900 C on Kluwak shell carbon. The adsorbent performance of the activated KTKAT was initially tested using methylene solution with a concentration of 50 ppm, a volume of 50 ml, and 0.15 grams of KTKAT. The solution was placed in an orbit shaker for 90 minutes and filtered. The absorbance of the filtrate adsorption results was measured at a wavelength of 662 nm using UV VIS. For the second test, 50 ml of 0.1 N Iodine and 0.5 g KTKAT were stirred for 15 minutes and then centrifuged for approximately 15 minutes. A volume of 10 ml of the resulting iodine solution adsorption filtrate was titrated with 0.1 N Sodium Thiosulfate. The surface area was determined using the BET method. The concentration (ppm) of methylene blue solution was determined by converting the absorbance measurement using the standard curve equation. The iodine number was determined by titrating the iodine adsorption filtrate with sodium thiosulfate (ml). These data show that there is an obvious correlation between activation temperature and methylene blue absorbance, iodine number, and surface area. At 800°C, the methylene blue adsorption is 12.41 mg/g, the iodine number is 875.61 mg/g, and the surface area is 561.404 m²/g.
Co-Authors Afrianti S, Lamuru Afriyanti S. Lamuru Aisyah Ananda, Rezky Andi Ahmad Maulana Senna Cincing Andina Sari Maharani Arief Widjaja Arif Budiman Assagaf, Iman Pradana A. Astuti Herawati, Dewi Dwi Ferel Imanuel Bala Fadhilah Sulham, Nurul Hanny F. Sangian Harun Pampang Harun Pampang Hijrah Amaliah Azis Indah , Raya Indah Raya Janna, Mifthahul Junianti, Fitri Lestari , Rianti Indah Maria Assumpta Nogo Ole Maria Assumpta Nogo Ole Maria Assumpta Nogo Olea Miftahul Janna Mimin Septiani Muhammad Arham Yunus Nayla Nurfiansyah Nurfiansyah Ole, Maria Assumpta Nogo Pampang, Harun Prisca Caesa Moneteringtyas Ramdhani , Anugrah Sabillah, A. Isyana Sherlina Zalfa Pertiwi Sri Diana Yuliani , HR Yuliani HR Yunus, Muhammad Arham Zakiyah Darajat Zakiyah Darajat Zakiyah Darajat Zulham Nurul Fadhila