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All Journal Reaktor Jurnal Bahan Alam Terbarukan Bulletin of Chemical Reaction Engineering & Catalysis World Chemical Engineering Journal FLYWHEEL : Jurnal Teknik Mesin Untirta Teknika: Jurnal Sains dan Teknologi Prosiding Semnastek Jurnal Teknika Martabe : Jurnal Pengabdian Kepada Masyarakat Journal of Community Service in Science and Engineering Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Pengabdian Dinamika Journal of Systems Engineering and Management JURNAL REKAYASA KIMIA & LINGKUNGAN
Endang Suhendi, Endang
Universitas Sultan Ageng Tirtayasa
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Journal : World Chemical Engineering Journal

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Polylactic acid Synthesis via Direct Polycondensation Method Using Candida rugosa Lipase Catalyst Rahmayetty, Rahmayetty; Barleany, Dhena Ria; Suhendi, Endang; Prasetya, Bayu; Andiyani, Tuti
World Chemical Engineering Journal VOLUME 1 NO. 5 DECEMBER 2017
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i5.2621

Abstract

Polylactic acid (PLA) is a biodegradable, biocompatible polymer and is produced from renewable natural resources. PLA synthesis through a polycondensation mechanism generally uses a metal catalyst, such as Zn and Sn oxides. The disadvantages of using metal catalysts are the contamination of products produced by the metals used so that unsafe products are used for biomedical applications and food packaging. The purpose of this research is to synthesize the safe PLA used for food packaging and biomedical applications. Polycondensation is done by pretreatment of lactic acid at 120oC for 1 hour. Diluted lactic acid is mixed with Candida rugosa lipise catalyst with a certain concentration (1, 2, 3 and 4% w / w). The mixture was heated at certain temperature (60; 80; 100 and 120oC) and vacuum pressure of 0.1 bar for 72 hours. The highest viscosity and density of PLA in this study was produced at 100oC and using 3% Candida rugosa lipase. The highest viscosity and density of PLA were 2443,9 CSt and 1231,9 mg / l respectively. Candida rugosa lipase concentration does not affect PLA yield at constant polycondensation temperature. PLA yield is affected by temperature. PLA yields at 60, 80, 100 and 120 ° C are 97.98; 97,65; 96.78; 96.13% respectively. The molecule weight of PLA at temperature 100oC for 1436-1482. Lipase concentration does not affect the molecular weight of the PLA.
Syngas Production by the Gasification of Bayah’s Coal over Ca(OH)2 and Na2CO3 catalyst Heriyanto, Heri; Nahudin, Ahmad; Amyranti, Mutia; Firdaus, Mochamad Adha; Suhendi, Endang; Kosimaningrum, Widya Ernayati
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10589

Abstract

Official data of Indonesia’s coal reserve provided by government in 2014 approximately reached 104.8 billion tonnes. Bayah as a part of South Banten region has been stored quite amount of coal. Gasification is one solution to utilize Bayah’s coal potential. Coal Gasification is a conversion process of solid phase coal into synthetic gas mixture (CO, H2). Main reaction of the process involves Boundouard and Water-Gas-Shift reaction. The aim of experiment was to observes influence of several variables such as : Air Fuel Ratio (AFR), Temperature, and Catalyst at particular condition. Gasification process becomes beneficial when ratio of synthetic gas mixture (H2/CO) exhibits 2.0. Synthetic gas mixtures were analyzed by using gas chromatograph method. 300 grams of Bayah’s coal (14 – 18 mesh) were gasified in updraft type of fixed bed reactor using steam injection under Air Fuel Ratio varied between 1.5, 2.0, 2.5, temperature of 600°C, 700°C, 800°C and catalyst of Ca(OH)2 and Na2CO3 . Air Fuel Ratio of 1.5 and 800 with the help Ca(OH)2 catalyst tended to produce the optimum result for H2/CO ratio which obtained a value of 1.98. Synthetic gas composition  at this variation reached 33.8% for Hydrogen and 17.1% for Carbon Monoxide.
Co-Authors Abdullah, Muhammad Hasyim Achmad Bahauddin Adian Yoga Pradana Agus Rochmat Aisah Hasanah Aisah Hasanah, Aisah Amyranti, Mutia Andiyani, Tuti Andre Wibowo Anis Fuad Anton Irawan Bambang Prasetya Bobby Kurniawan D. R. Barleany Denni Kartika Lestari Denni Kartika Sari Denni Kartika Sari Dewi Yasya, Annisa Dyah L. Trenggonowati Eko Prasetyo Eko Prasetyo Fatah Sulaiman Fauzan, Eka R. Firdaus, Mochamad Adha Gilang Umar Paradise, Gilang Umar Heri Heriyanto Heri Heriyanto Heriyanto, Heri Idham Priandana, Idham Ilham Kiki Shahila Indar Kustiningsih Jayanudin Jayanudin Kosimaningrum, Widya Ernayati Lestari, Retno Sulistyo Misri Gozan Muhammad Triyogo Adiwibowo Nadya Fitri Asyuni Nahudin, Ahmad Naibaho, Pipiet P.U. Ni Ketut Caturwati Ni Ketut Caturwati, Ni Ketut Nindya Prastuti Nufus Kanani, Nufus Okta Abdul Choir Prasetya, Bayu Pujiastuti, Hendrini Rahma Putri, Azzahra Rahmayetty Rahmayetty Rahmayetty, Rahmayetty Retno Sulistyo Dhamar Lestari Retno Sulistyo Dhamar Lestari Retno Sulistyo Dhamar Lestari Sukirno Sukirno Syaidah Anjariyah Syaidah Anjariyah, Syaidah Teguh Kurniawan Teguh Kurniawan Tia Lestari Vicky Zayan Giffari Widya Ernayati Kosimaningrum