BIBLIOS

Tipo
Artigos em Conferência

Tipo de Documento
Resumo

Título
Thermophysical Properties of Binary Mixtures of 1-Ethyl-3-Methyimidazolium Acetate and Water

Participantes na publicação
Carla S. G. P. Queirós (Author)
CQE
Tiago F. S. Avelino (Author)
David E. N. Bastos (Author)
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Fernando J. V. Santos (Author)
Dep. Química e Bioquímica
CQE
Ângela F. S. Santos (Author)
Dep. Química e Bioquímica
CQE
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE

Resumo
Lignocellulosic biomass represents one of the most important renewable energy sources for Europe, being mainly used for energy production through combustion. The growing awareness of the need for energy efficiency gains requires new approaches for problems that, during the time of cheap energy and unlimited raw materials resources, were not the object of special care for industry and consequently, for research. Lignocellulosic biomass is composed of cellulose (35 to 50 %), lignin (18 to 30%), hemicelluloses (15 to 30%), and small amounts of extractive compounds.1,2 Due to the complex composition and structure of this type of biomass, their fractionation, in an effective and rentable way, is still a challenge target. \n\nIndustrially, biomass fractionation into cellulosic pulp and lignin is mainly accomplished by the kraft process, which is not comprehensive in the utilization of noncellulosic components and causes complaints from the standpoint of environmental concerns. Most of the cellulose dissolution processes also cause serious environmental problems due to the solvents used.3,4 In recent years, a need for more “green” solvents and processes as gain the attention of the researchers. Ionic liquids (ILs) have been recently explored as novel “green” solvents for lignocellulosic materials.51-ethyl-3-methylimidazolium acetate ([emim][OAc]) has been studied as one of the most promissory ILs to dissolve cellulose1–3,6,7 although its properties are not well known. The amount of water in the ionic liquid influence their capacity to dissolve cellulose8–10 despite this fact there also a lack about the influence of water in the physical properties of the ILs, even in the case of the [emim][OAc]. \nIn this work the thermal and electrical conductivity, density, speed of sound and viscosity of binary mixtures of 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) and water, and infinite dilution diffusion coefficients were measured at atmospheric pressure. Total miscibility of the two liquids was found in the temperature range studied (293.15 to 333.15 K).

Editor
Gernot Potlacher


Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Evento
21th European Conference on Thermophysical Properties, ECTP2017, September 3-8, 2017

Identificadores da Publicação
ISBN - 9783851255461

Local
Graz, Austria

Organizadores
Institute of Experimental Physics, TU Graz

Editora
Tu-Graz

Coleção
Abstract Book



Identificadores do Documento
DOI - https://doi.org/10.3217/978-3-85125-546-1