Fredrik Bajers Vej 5
Postboks 159 9100 Aalborg
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Kasia Arturi, Department of Chemistry and Bioscience, will defend her thesis on "Value-added Products by Optimization of Solvothermal Liquefaction of Wastes"
11.05.2017 kl. 13.00 - 16.00
"Value-added Products by Optimization of Solvothermal Liquefaction of Wastes"
The need to replace fossil-based fuels, materials, and chemicals has spurred intense research in dozens of biomass conversion fields. Hydrothermal liquefaction (HTL) is a thermochemical technique that utilizes the unique properties of near- and supercritical water to convert complex biomass feeds into a spectrum of value-added products, namely drop-in energy carriers, transportation biofuels, and platform chemicals. The process is versatile in terms of feedstocks and would, therefore, be an excellent addition to a future biorefinery. However, numerous challenges must be overcome before liquefaction can be commercialized.
This thesis deals with the optimization of different liquefaction aspects in order to promote its further advancement, including I ) Application of multivariate analysis for prediction of generally valid trends in process' outputs as a function of reaction conditions; II) Optimization of products' characterization; III) Development of innovative reactors and procedures combining the ease of batch processing with improved parameter control; and IV) Assessment of different types of wastes as a raw feed to liquefaction and a source of value-added products. The results showed that biomass characteristics are the most important factors influencing the HTL output and that each biomass type requires a different set of optimized process parameters. Furthermore, the quality and the statistical significance of the models varied notably dependent on the biomass type and the response.
The characterization of the liquefaction products was improved significantly by application of advanced analytical tools and methods, including solid-phase microextraction (SPME) and high-resolution liquid chromatography mass spectrometry (LC-ESI-MS/MS). Utilization of such techniques was shown to be crucial for an accurate quantification of the produced chemicals. A strict control of the liquefaction process parameters is an absolute prerequisite for obtaining results comparable to continuous systems and commercialization of the technology. Application of cold injection of biomass into a preheated and pre-pressurized reaction medium was a procedure combining fast heating rates with precise residence time control. Also, the applied pressure regulation system adapted the reaction medium density, increasing the control over conversion pathways. Liquefaction of wastes resulted in a broad spectrum of products, mainly biofuels and biochemicals, depending on the feedstock.
The most promising outputs from HTL of lignin included aromatic monomers, which could replace the fossil resources as platform chemicals. In addition to the aromatics, liquefaction of lignocellulosic biomass also yielded cyclic compounds, which can be utilized as high-value building blocks and precursors for drugs, fragrances, and fuels. Conversion of an unsaturated polyester resin resulted in the recovery of monomers from the polymer chains, in addition to the high-value secondary reaction products.
Associate Professor, Donghong Yu, Department of Chemistry and Bioscience, Aalborg University, Denmark
Department of Chemistry and Bioscience, Section of Chemical Engineering
Niels Bohrs Vej 8, 6700 Esbjerg, room: C1.119
07.03.2017 kl. 10.00 - 03.05.2017 kl. 17.00
Bliv auditor i tilgængelighed på fem kursusdage og lær, hvordan man overholder Bygningsreglementets tilgængelighedskrav.
29.04.2017 kl. 15.00 - 18.00
I forbindelse med Forskningens Døgn på AAU CPH, bydes der lørdag den 29/4 kl. 15.00 indenfor til forskningsformidling gennem videnskabsteater med efterfølgende paneldebat mellem førende forskere inden for livsstilsforskningen.
01.05.2017 kl. 13.00 - 14.00
"Person- Centered Technology Approaches to Deliver Precision Medicine" by Dr. Katherine Kim, PhD, MPH, MBA.
02.05.2017 kl. 09.00 - 18.05.2017 kl. 16.00
På SBi's kursus om fugt og efterisolering får du en introduktion til relevant varme- og fugtteori samt gode, konkrete råd om, hvordan du forebygger fugtproblemer, både under projektering og udførelse.
02.05.2017 kl. 13.00 - 16.00
03.05.2017 kl. 13.00 - 16.00
Rasmus is defending his PhD Thesis; Heating Strategies in a Renewable Energy Transition
03.05.2017 kl. 13.00 - 17.00
- AFHANDLINGENS TITEL: “KOMMUNALE KVALITETSSTANDARDER I ÆLDREPLEJEN. FRA POLITIK TIL PRAKSIS”
03.05.2017 kl. 13.00 - 17.00
Brian Bemman will defend his thesis entitled Computational problems in modeling Milton Babbitt's compositional process
04.05.2017 kl. 09.30 - 18.30
The conference is for you who take interest in change initiatives, for you who want to be inspired and for you who work to create and lead change.
04.05.2017 kl. 13.00 - 14.00
Kom og hør serie-iværksætterne, Mads Faurholt og Lars Tvede, der har startet over 30 virksomheder med tusindvis af ansatte og værdisat til flere milliarder kroner.
04.05.2017 kl. 13.00 - 16.00
Elsa Sverrisdóttir, Department of Chemistry and Bioscience will defend her thesis on: "Initiating Genomic Selection in Tetraploid Potato"
04.05.2017 kl. 13.00 - 16.00
Karin is defending her PhD Thesis; LABOURED LEARNING - Investigating Challenged Localities through a Geography of Vocational Education
05.05.2017 kl. 12.30 - 18.30
Det Samfundsvidenskabelige Fakultet ved Aalborg Universitet har antaget den af Bo Poulsen indleverede afhandling, 'Global Marine Science and Carlsberg - The Golden Connections of Johannes Schmidt (1877-1933)' til offentligt forsvar for den filosofiske doktorgrad (Dr. Phil.).
05.05.2017 kl. 13.00 - 16.00
05.05.2017 kl. 13.00 - 18.00