Sökning: "ethanol"

Visar resultat 1 - 5 av 437 avhandlingar innehållade ordet ethanol.

  1. 1. Ethanol from lignocellulose : Management of by-products of hydrolysis

    Detta är en avhandling från Karlstad : Karlstad University

    Författare :Björn Alriksson; Karlstads universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ethanol; Lignocellulose; Detoxification; Genetic engineering; Enzyme production; MEDICINE Chemistry Biochemistry; MEDICIN Kemi Biokemi; Kemi; Chemistry;

    Sammanfattning : Fuel ethanol can be produced from lignocellulosic materials, such as residues from agriculture and forestry. The polysaccharides of lignocellulose are converted to sugars by hydrolysis and the sugars can then be fermented to ethanol using microorganisms. However, during hydrolysis a wide range of by-products are also generated. LÄS MER

  2. 2. Ethanol from lignocellulose : physiological effects of inhibitors and fermentation strategies

    Detta är en avhandling från Goteborg, Sweden : Chalmers Tekniska Hogskola

    Författare :Mohammad J Taherzadeh; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acetic acid; Agents; Cellulose; Enzyme inhibition; Feedback control; Fermentation; Hydrolysis; Metabolites; pH; Physiology; Wood; Yeast; Dilute acid hydrolyzate; Inhibitors; Lignocellulose; Physiological effects; Saccharomyces cerevisiae; Ethanol;

    Sammanfattning : Fermentative ethanol production from dilute-acid hydrolyzates of wood using the yeast Saccharomyces cerevisiae was investigated. Of known inhibitors in hydrolyzates, acetic acid, furfural and hydroxymethyl furfural (HMF) were found in the highest concentrations (up to about 10 g/l). LÄS MER

  3. 3. Fast Dynamic Processes in Solution Studied by NMR Spectroscopy

    Detta är en avhandling från Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Författare :Mária Šoltésová; Stockholms universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear magnetic resonance; Dynamics; Ethanol; Cryptophanes; Saccharides; Nukleární magnetická rezonance; dynamika; ethanol; kryptofan; sacharidy; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : Nuclear magnetic resonance (NMR) spectroscopy is capable to deliver a detailed information about the dynamics on molecular level in a wide range of time scales, especially if accompanied by suitably chosen theoretical tools. In this work, we employed a set of high-resolution NMR techniques to investigate dynamics processes in several weakly interacting molecular systems in solution. LÄS MER

  4. 4. Ethanol Pulping of Reed Canary Grass

    Detta är en avhandling från Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Författare :Helena Håkansson; Karlstads universitet.; [1995]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pulping; Nonwood plants; Reed canary grass; Ethanol; Organosolv pulping; Statistical analysis; Chemical Engineering; Kemiteknik;

    Sammanfattning : The aim of this study was to investigate the possibility of processing an agricultural crop grown in Sweden to usable pulp. A further purpose was to study ethanol pulping applied to a non-wood raw material.The first part of this thesis deals with the criteria for selecting a fibre crop for further studies. LÄS MER

  5. 5. Continuous Ethanol Production from Dilute-acid Hydrolyzates: Detoxification and Fermentation Strategy

    Detta är en avhandling från Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Författare :Ronny Purwadi; Högskolan i Borås.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HMF; serial bioreactor; immobilization; overliming; furfural; ethanol; continuous cultivation; S. cerevisiae; flocculating yeast; continuous detoxification; dilute-acid hydrolyzate;

    Sammanfattning : The production of fuel ethanol from cellulosic biomass is of growing interest around the world. Lignocellulosic residuals can be used to produce transportation fuel, with the overall process having little net production of greenhouse gases. LÄS MER