Events at Department of Energy Technology

PhD defence by Iulia-Maria Sintamarean on Feedstock Preparation and Physico-chemical Characterization; Optimization of Feedstocks for Continuous HTL and Optimum Yield

Time

23.05.2017 kl. 13.00 - 16.00

Description

Iulia-Maria Sintamarean, Department of Energy Technology, will defend the thesis "Feedstock Preparation and Physico-chemical Characterization; Optimization of Feedstocks for Continuous HTL and Optimum Yield".

TITLE

Feedstock Preparation and Physico-chemical Characterization; Optimization of Feedstocks for Continuous HTL and Optimum Yield

PHD DEFENDANT

Iulia-Maria Sintamarean

SUPERVISOR

Professor Lasse Rosendahl

MODERATOR

Associate Professor Henrik Sørensen 

OPPONENTS

Associate Professor Carsten Bojesen, Dept. of Energy Technology, Aalborg University (Chairman)
Principal Scientist Anja Oasmaa, Liquid Biofuels, VTT, Finland
Asoociate Professor Derk Willem Frederik Brilman, University of Twente, the Netherlands

ABSTRACT

Hydrothermal liquefaction (HTL) is a thermochemical route to convert a diverse range of biomass substrates into liquid energy carrier. The HTL process includes the preparation of a biomass aqueous slurry and heating the slurry up to sub- or supercritical water conditions to facilitate the biomass dissolution and conversion into biocrude. For continuous HTL processing, the preparation of pumpable biomass slurries is extremely challenging especially when it comes to lignocellulosic biomass. So far, the feedstock pumpability has been a neglected area of research within the hydrothermal processing field because most studies are conducted in batch reactors where pumpability is beyond scope.

The main contribution of this work is in developing strategies to prepare pumpable wood slurries for continuous hydrothermal liquefaction. Three pretreatment methods are proposed for processing wood powder (particle size < 0.25 mm) or wood chips (10 mm to 15 mm or larger). Methods based on thermochemical treatment as well as strategies based on physical and mechanical pretreatment (consisting of size reduction and mixing of biomass with other substrates) are studied. The impact of the feedstock pretreatment on the biocrude yield and biocrude properties is also investigated. Two of the three pretreatment strategies were tested in a continuous bench scale HTL plant which confirms the technical feasibility of the pretreatment methods proposed but also the good agreement between the laboratory-scale and the large scale pretreatment and pumpability tests.

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PhD defence by Iulia-Maria Sintamarean on Feedstock Preparation and Physico-chemical Characterization; Optimization of Feedstocks for Continuous HTL and Optimum Yield

ALL ARE WELCOME. THE DEFENCE WILL BE IN ENGLISH.

AFTER THE DEFENCE THERE WILL BE AN INFORMAL RECEPTION AT PONTOPPIDANSTRAEDE 111 IN TNE COFFEE ROOM.

 

Host

Department of Energy Technology

Address

Pontoppidanstræde 111, auditorium