[Divulgacao] ENCONTROS COM A CIÊNCIA DO CIEPQPF (Dto Eng. Química, FCTUC)

[Fernando Bernardo]

Caro senhor(a),
Peço a sua atenção para a divulgação dos seminários abaixo, inseridos na
iniciativa ENCONTROS COM A CIÊNCIA DO CIEPQPF.

(Centro de Investigação em Engenharia dos Processos Químicos e Produtos
da Floresta, Dpto Engenharia Química, FCTUC)

-----------------------------------------------------------------------------------
SEXTA SESSÃO DOS ENCONTROS COM A CIÊNCIA

10 OUT 2012, 14h-15h30
-------------------------------------------------------------------------------------

*1. Recycling agroindustrial by-products by composting technologies**
*Margarida J. Quina
CIEPQPF, DEQ-FCTUC, Reaction, Separation and Environmental Engineering 
Group (GERSE)

Composting may be defined as the biological decomposition and 
stabilization of organic subtracts, under aerobic and thermophilic 
conditions, to obtain a final product that can be beneficially applied 
to land as soil conditioner. There are many agroindustrial by-products 
that can be recycled by this technology, which can be used both at small 
(domestic) or industrial scales. This presentation will give an overview 
about the process technologies and future trends, as well as some 
results from a case study.

*2. **Tailoring of silica based aerogels for Space applications*
Luísa R. Durães
CIEPQPF, DEQ-FCTUC, Computing, Statistics & Materials Group (CEM)

Tetra-alkoxysilane precursors (Si(OR)_4 ) are widely used to obtain 
silica aerogels. These aerogels exhibit low density (~100--350 kg/m^3 ), 
high porosity (>90%) and surface area, low thermal conductivity 
(~0.01--0.02 W/m K) and high transparency (>90%). These properties make 
them suitable for use as thermal or acoustic insulators, optical 
materials, filters, catalysts, among others. Despite these appealing 
properties, they are brittle, absorb moisture and still have a 
relatively high density, which might be a drawback for their performance 
in certain applications, namely in Space insulation applications. Using 
trialkoxysilanes (R'-Si(OR)_3 ) as precursors in a two-step acid-base 
catalyzed sol--gel chemistry, the produced silica based aerogels can 
fulfill the targets for Space applications. In this work, the effect of 
changing of R' and R groups (methyl, ethyl or vinyl) on the aerogels 
density, thermal conductivity, hydrophobicity and mechanical strength 
will be presented, considering the specifications for their use in Space.



Fernando Pedro Martins Bernardo
Assistant Professor
Department of Chemical Engineering
University of Coimbra

Pólo II - Rua Sílvio Lima
3030-790 Coimbra
Portugal
Tele: +351-239-798722
Fax: +351-239-798703
bernardo at eq.uc.pt
www.eq.uc.pt/~bernardo



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.eq.uc.pt/pipermail/divulgacao/attachments/20121003/b52c033e/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 13319 bytes
Desc: not available
URL: <http://www.eq.uc.pt/pipermail/divulgacao/attachments/20121003/b52c033e/attachment.png>