Production of ethanol from sawdust

This study involves the production of ethanol from sawdust (60 mesh) with pyrolysis as a pretreatment process to remove hemicellulose. The solid product after pyrolysis was hydrolyzed to produce fermentable sugars which were fermented to ethanol using Saccharomyces Cerivisiae. A parallel test was co...

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Main Author: Borja, Josephine Q.
Format: text
Language:English
Published: Animo Repository 1994
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Online Access:https://animorepository.dlsu.edu.ph/etd_masteral/1633
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Institution: De La Salle University
Language: English
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spelling oai:animorepository.dlsu.edu.ph:etd_masteral-84712021-03-18T07:44:08Z Production of ethanol from sawdust Borja, Josephine Q. This study involves the production of ethanol from sawdust (60 mesh) with pyrolysis as a pretreatment process to remove hemicellulose. The solid product after pyrolysis was hydrolyzed to produce fermentable sugars which were fermented to ethanol using Saccharomyces Cerivisiae. A parallel test was conducted using direct acid hydrolysis and results were compared with that of the pyrolysis route. The pyrolysis temperature tested were 260'C and 280'C. Pyrolysis time varied between 1 hour and 1.5 hours for each temperature setting. The solid product of pyrolysis was hydrolyzed using 1 percent H2SO4 and a sawdust of acid ratio of 1:10 (w/v). In the direct acid hydrolysis, hemicellulose was removed by treating the sawdust with 10 percent H2SO4 and the cellulose obtained was decrystallized using 62 percent H2SO4. The decrystallized cellulose was then hydrolyzed using 1 percent H2SO4. The acid hydrolyzate of sawdust pyrolyzed at 260'C for 1.5 hours gave the highest glucose and ethanol yield among the pyrolysis settings. Compared with the direct acid hydrolysis, the pyrolysis route produced a hydrolyzate containing 4.55 percent w glucose against 3.29 percent w in the direct acid hydrolysis. Conversion of cellulose to glucose and glucose to ethanol was 54.12 percent and 42.01 percent in the pyrolysis route and 44.99 percent and 39.83 percent in the direct acid hydrolysis, respectively. The acid hydrolyzates which were fermented to ethanol gave a distillate of 2.54 percent w and 1.35 percent w ethanol in the pyrolysis route and direct acid hydrolysis, respectively. This means a 46.85 percent higher ethanol yield in the pyrolysis route than in the direct acid hydrolysis. 1994-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/etd_masteral/1633 Master's Theses English Animo Repository Alcohol Wood waste Wood -- Chemistry Chemistry Technical Pyrolysis Acids Chemical Engineering
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
language English
topic Alcohol
Wood waste
Wood -- Chemistry
Chemistry
Technical
Pyrolysis
Acids
Chemical Engineering
spellingShingle Alcohol
Wood waste
Wood -- Chemistry
Chemistry
Technical
Pyrolysis
Acids
Chemical Engineering
Borja, Josephine Q.
Production of ethanol from sawdust
description This study involves the production of ethanol from sawdust (60 mesh) with pyrolysis as a pretreatment process to remove hemicellulose. The solid product after pyrolysis was hydrolyzed to produce fermentable sugars which were fermented to ethanol using Saccharomyces Cerivisiae. A parallel test was conducted using direct acid hydrolysis and results were compared with that of the pyrolysis route. The pyrolysis temperature tested were 260'C and 280'C. Pyrolysis time varied between 1 hour and 1.5 hours for each temperature setting. The solid product of pyrolysis was hydrolyzed using 1 percent H2SO4 and a sawdust of acid ratio of 1:10 (w/v). In the direct acid hydrolysis, hemicellulose was removed by treating the sawdust with 10 percent H2SO4 and the cellulose obtained was decrystallized using 62 percent H2SO4. The decrystallized cellulose was then hydrolyzed using 1 percent H2SO4. The acid hydrolyzate of sawdust pyrolyzed at 260'C for 1.5 hours gave the highest glucose and ethanol yield among the pyrolysis settings. Compared with the direct acid hydrolysis, the pyrolysis route produced a hydrolyzate containing 4.55 percent w glucose against 3.29 percent w in the direct acid hydrolysis. Conversion of cellulose to glucose and glucose to ethanol was 54.12 percent and 42.01 percent in the pyrolysis route and 44.99 percent and 39.83 percent in the direct acid hydrolysis, respectively. The acid hydrolyzates which were fermented to ethanol gave a distillate of 2.54 percent w and 1.35 percent w ethanol in the pyrolysis route and direct acid hydrolysis, respectively. This means a 46.85 percent higher ethanol yield in the pyrolysis route than in the direct acid hydrolysis.
format text
author Borja, Josephine Q.
author_facet Borja, Josephine Q.
author_sort Borja, Josephine Q.
title Production of ethanol from sawdust
title_short Production of ethanol from sawdust
title_full Production of ethanol from sawdust
title_fullStr Production of ethanol from sawdust
title_full_unstemmed Production of ethanol from sawdust
title_sort production of ethanol from sawdust
publisher Animo Repository
publishDate 1994
url https://animorepository.dlsu.edu.ph/etd_masteral/1633
_version_ 1712574960857251840