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Visar resultat 1 - 5 av 51 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Molecular-level Simulations of Cellulose Dissolution by Steam and SC-CO2 Explosion

   Författare :Faranak Bazooyar; Högskolan i Borås; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; molecular modelling; cellulose; steam explosion; SC-CO2 explosion; Resource Recovery; Resource Recovery; Resursåtervinning;

   Sammanfattning : Dissolution of cellulose is an important but complicated step in biofuel production from lignocellulosic materials. Steam and supercritical carbon dioxide (SC-CO2) explosion are two effective methods for dissolution of some lignocellulosic materials. Loading and explosion are the major processes of these methods. LÄS MER

3. 2. Mild Steam Explosion of Norway Spruce

   Författare :Kerstin Jedvert; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; kraft cooking; biorefinery; steam explosion; galacto glucomannan; Norway spruce;

   Sammanfattning : The most common wood species in Sweden, and one of the most important renewable raw materials in Northern Europe, is Norway spruce (Picea abies). Today, it is utilized mainly for sawed timber and the production of pulp and paper. LÄS MER

4. 3. Diffusion of large molecules in steam-exploded wood

   Författare :Patric Kvist; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wood; Large Molecules; Diffusion; LBM; Steam Explosion; FRAP;

   Sammanfattning : The diffusion of large molecules in wood pre-treated with steam explosion is important to understand in the context of the materials biorefinery. Steam explosion is a pretreatment method used to both open up the internal structure of wood and increase the accessibility of the cell walls of the wood with the use of high-pressure steam, and it is considered an energy-efficient method. LÄS MER

5. 4. Development of the Steam Pretreatment Process for Production of Ethanol from Lignocellulosic Biomass

   Författare :Sanam Monavari; Bioteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spruce; Ethanol production; Sugarcane bagasse; SSF; Fermentation; Enzymatic hydrolysis; SO2; Steam pretreatment; Acid catalyst;

   Sammanfattning : At a time when natural petroleum resources are on the verge of depletion, and concern about climate change is increasing, the potential of lignocellulosic material for the production of bioethanol is well recognized. Ethanol can be produced from biomass through enzymatic hydrolysis and fermentation. LÄS MER

7. 5. Waste Heat Recovery from Combustion Engines based on the Rankine Cycle

   Författare :Gunnar Latz; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; waste heat recovery; Rankine cycle; piston expander;

   Sammanfattning : Most of the energy in the fuel burned in modern automotive internal combustion engines is lost as wasteheat without contributing to the vehicle’s propulsion. In principle some of this lost energy could becaptured and used to increase the vehicle’s fuel efficiency by fitting a waste heat recovery system to theengine. LÄS MER