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ITS » Master Theses » Teknologi Proses - S2
Posted by aprill@is.its.ac.id at 06/11/2015 14:31:13  •  809 Views


PENGARUH PENGGUNAAN CAIRAN IONIK UNTUK DEGRADASI SELULOSA MENJADI GLUKOSA DAN OLIGOSAKARIDA MENGGUNAKAN MOTODE HIDROTERMAL DENGAN PERLAKUAN AWAL SONIKASI

THE EFFECT OF IONIC LIQUID IN CELLULOSE DEGRADATION TO PRODUCE GLUCOSE AND OLIGOSACCHARIDES USING HYDROTHERMAL METHOD WITH SONICATION PRETREATMENT

Author :
MAYANGSARI, NOVI EKA ( 2312 201 016 )




ABSTRAK

Selulosa adalah komponen utama dari tanaman dimana mempunyai struktur kristalin yang kuat sehingga selulosa sulit larut dalam air. Selulosa dapat dihidrolisis menjadi beberapa produk seperti oligosakarida glukosa gliseraldehida dan lain sebagainya. Beberapa teknologi untuk konversi selulosa seperti degradasi dengan cairan ionik asam enzimatikfermentasi hidrotermal dan lain sebagainya. Pada penelitian ini dekomposisi selulosa menggunakan proses hidrotermal dengan perlakuan awal sonikasi. Tujuan penelitian ini adalah untuk mempelajari pengaruh perlakuan awal sonikasi pada proses hidrotermal untuk degradasi selulosa dalam larutan NaCl-asam oksalat. Pada proses ini NaCl digunakan sebagai cairan ionik asam oksalat sebagai katalis dan CO2 sebagai gas penekan. Selulosa dan larutan NaClasam oksalat dilakukan pada tekanan 70 dan 200 bar CO2 pada berbagai waktu 30-180 menit dan berbagai suhu 125-200C. Sampel dipisahkan antara padatan dan liquidnya. Padatan dianalisa dengan X-Ray Diffraction XRD dan Scanning Electron Microscopy SEM. Dari analisa XRD menunjukkan bahwa terjadi penurunan kristalinitas setelah proses sonikasi dan hidrotermal. Kristalinitas selulosa murni setelah proses sonikasi mengalami penurunan dari 5018 menjadi 3761 setelah proses hidrotermal terjadi penurunan kristalinitas hingga sebesar 2581 dan setelah proses kombinasi sonikasi dan hidrotermal terjadi penurunan kristalinitas hingga 2167. Analisa SEM menunjukkan bahwa terjadi perubahan struktur dan morfologi dari selulosa baik pada proses sonikasi proses hidrotermal dan kombinasi sonikasi dan hidrotermal. Sedangkan sampel liquid dianalisa dengan reagen 35-dinitrosalicylic acid DNS yang menunjukkan terjadi penurunan konsentrasi glukosa dengan semakin lamanya waktu hidrotermal. Untuk analisa selanjutnya menggunakan Liquid Chromatography Mass Spectrometry LC-MS yang menunjukkan bahwa produk degradasi selulosa terdiri dari glycolaldehyde 16-anhydroglucose 5-HMF hydroxymethyl furaldehyde erythrose fructose glucose dan oligomer cellobiose cellotriose cellotetraose cellopentaose cellohexaose.


ABSTRACT

Cellulose is a major component in the cell walls of plants which have a robust crystalline structure. Therefore cellulose is not soluble in water. This component can be hydrolyzed into some products such as oligosaccharides glucose fructose erythrose and etc. Various technologies for conversion of cellulose such as degradation with ionic liquid acid enzymaticfermentation hydrothermal and etc. In this study developed a cellulose decomposition process by hydrothermal method with sonication pretreatment. The purpose of this research was to study the effect of sonication pretreatment in hydrothermal method for degradation of cellulose on solution of NaCl-oxalic acid. In this process NaCl was used as ionic liquid oxalic acid as catalyst and CO2 as pressurizing gas. Cellulose and NaCloxalic acid solution 20 gr L-1 was conducted under 70 and 200 bar of CO2 in various times 30 to 180 minutes and various temperature 125 to 200C. After decomposition time was achieved the sample was separated between solid and liquid. Solid product were analyzed by using X-Ray Diffraction XRD and Scanning Electron Microscopy SEM. From XRD analysis obtained that there is a decrease of crystallinity after sonication and hydrothermal process. Crystallinity of cellulose after sonication decreased from 50.18 to 37.61 after hydrothermal process decreased until 25.81 and after hydrothermal with sonication pretreatment decreased until 21.67. SEM analysis obtained that changes of cellulose structure and morphology in sonication hydrothermal and hydrothermal with sonication pretreatment. Liquid was analyzed by using 35-dinitrosalicylic acid DNS reagent obtained that decreased of glucose concentration with a long time hydrothermal process. For Liquid ChromatographyMass Spectrometry LC-MS obtained that cellulose degradation products contained glycolaldehyde 16-anhydroglucose 5-HMF hydroxymethyl furaldehyde erythrose fructose glucose dan oligomer cellobiose cellotriose cellotetraose cellopentaose cellohexaose.



Keywordsdegradasi; selulosa; hidrotermal; cairan ionik; oligosakarida
 
Subject:  Selulosa - biodegradasi; hidrotermal
Contributor
  1. Dr.Ir. Sumarno, M.Eng
Date Create: 06/11/2015
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Master-23103150001520
Collection ID: 23103150001520
Call Number: RTK 572.566 82 May p


Source
Master Theses of Chemical Engineering, RTK 572.566 82 May p, 2015

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Copyright @2015 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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  1.  ITS-Master-39433-2312201016-abstract_id.pdf - 237 KB
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  3.  ITS-Master-39433-2312201016-conclusion.pdf - 428 KB




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