Engineering Commons^™

Activation Of Biochar From Olive Residues: A Predictive Model For Yield And Surface Area, Franco Berruti, Anastasia Colomba, Cedric Briens

Bio-Char II: Production, Characterization and Applications

A great amount of work in the literature is dedicated to the kinetic modelling of gasification reactions, while a limited number of authors have paid attention to the evolution of physical parameters, which are very important in the case in which the reaction is applied to the production of activated carbons. The Volume reaction model (VRM) [1], the Shrinking core model (SCM) [2], and the Random pore model (RPM) [3] are unable to provide a relationship between kinetics and the physical properties of the activated carbon and, particularly, between yield and surface area.

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Challenges And Progresses Made On The Microkinetic Description Of Lignin Liquefaction: Application Of Group Contribution Methods, Manuel Garcia-Perez, Evan Terrell, Linda Broadbelt

Pyroliq 2019: Pyrolysis and Liquefaction of Biomass and Wastes

In this presentation a comprehensive microkinetic modelling framework and experimental tools are used to describe product yield and composition of direct lignin liquefaction processes with and without solvents (See Figure 1). With the framework proposed we aim to develop a unified theory and models capable of describing both dry (pyrolysis) and wet (hydrothermal and solvolysis) lignin liquefaction processes. An important phenomenon that has been shown to occur during lignin pyrolysis (as well as cellulose) is the formation of a liquid intermediate phase, and subsequent ejection of heavy products (>~250 Da) as aerosols from this intermediate. In our presentation we …

Curation Of A Cho Dg44 Genome Scale Model And Application To Support Cell Culture Development Process, Cyrielle Calmels, Laetitia Malphettes, Mikael Rørdam Andersen

Cell Culture Engineering XVI

Genome scale models (GSM) have become a useful tool to connect different omics dataset into a single computational framework, thus giving a good overview of the flux distribution and metabolites interconnections in a specific environmental condition. A community genome-scale metabolic network reconstruction of Cricetulus griseus and cell line specific models have been recently developed 1. The main objectives with the use of the published CHO DG44 model were to enhance industrial bioprocess performance by suggesting genetic or metabolic targets, as well as strategies for medium optimization, and by bringing more fundamental knowledge about CHO cell metabolism. In a first step, …

Woody And Agricultural Biomass Diversity In Torrefaction: A Complete Study In Solid Conversion And Volatiles Formation On Tga-Gcms, María González Martínez, Capucine Dupont, Xuan Mi Meyer, Christophe Gourdon

Biochar: Production, Characterization and Applications

Nowadays, there is an increasing awareness on the importance of biomass waste as a renewable source of energy, materials and chemicals. In this context, the European project MOBILE FLIP aims at developing and demonstrating mobile conversion processes suitable with various underexploited agro- and forest based biomass resources in order to produce energy carriers, materials and chemicals. One of these processes is torrefaction, which consists in a mild thermal treatment, occurring typically between 200 and 300°C during a few tens of minutes in a default-oxygen atmosphere.

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Flash Sintering Of Srtio3, Fabian Lemke

Electric Field Assisted Sintering and Related Phenomena Far From Equilibrium

Since the first reports of flash sintering in 2010 the community is continuously growing. Several parameters have been identified to be important gaining access to flash sintering, e.g. the temperature change due to joule heating, changes in the microstructure, polarization of defects or other effects on the defect chemistry. Analyzing the process is raised to another level of complexity compared to conventional sintering.

Sintering and grain growth experiments under an electrical field are conducted with SrTiO3. The results are compared to our existing database, implying simulations of the defect-chemistry, to discriminate the most important parameters in the flash sintering process. …

Towards Filtered Gas-Solid Flow Models, Juray De Wilde

The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering

To account for meso-scale phenomena in coarse grid simulations, correlation terms appearing in the filtered gas-solid flow equations have to be modeled. Filtered models for the gas-solid momentum transfer are focused on and possible approaches are derived and evaluated. The evaluation supports the combination of an apparent distribution of the filtered gas phase pressure gradient over the phases and an apparent drag force to describe filtered gas-solid momentum transfer. As the filter frequency decreases, the contribution of the apparent distribution of the filtered gas phase pressure gradient over the phases to the filtered description of gas-solid momentum transfer gradually grows …