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Communication Dans Un Congrès Année : 2014

Current research done on thermochemical conversion of biomass at LRGP - Nancy

Guillain Mauviel
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Anthony Dufour
Jacques Lede
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Gabriel Wild
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Francis Billaud

Résumé

The talk will give an overview of current research developed at CNRS-LRGP Nancy (France) on the thermochemical conversion of lignocellulosic biomass. The main studied processes are pyrolysis and gasification to produce electricity, biofuels intermediates or value-added chemicals such as aromatics. A multiscale methodology is developed ranging from molecular to bioenergy chain scales. The studies at molecular and mesoscopic levels give insight into the mechanisms of biomass pyrolysis and are used to design reactors. Conversely, the detailed mass and energy balances of processes point out process units with low energy efficiency and/or high environmental impact and stress the improvement of reactors and the need of more fundamental knowledge. The methodology will be highlighted by some examples: 1. At the mesoscopic and particle scales, the mechanism of biomass pyrolysis are studied by "slow" conventional setups (TGA, DSC) & by original "fast" setups (image furnace [1], micro fluidized bed). The extent of softening during biomass pyrolysis and interactions in the polymer network are revealed by in-situ analyses: NMR and rheology [2]. Advanced mass spectrometry is also used to analyse tar with Pr. F. Qi's group (Hefei) [3]. 2. At the reactor scale, a 3 kg/h pilot plant has been constructed to study fluidized bed pyrolysis or gasification (syngas quality, but also bed agglomeration). 3. At the process scale, models of thermochemical processes are developed under Aspen Plus [4]. Detailed mass and energy balances are obtained including pollutant emissions (trace species such as tar, NOx, minerals, etc.). The effect of catalysts and reactor operating conditions are modelled [5]. These models point out the key process units and parameters detrimental to the energy and environmental efficiency. References [1] Christodoulou M., Mauviel G., Lédé J,(...), Billaud F., Novel vertical image furnace for fast pyrolysis studies, Journal of Analytical and Applied Pyrolysis (2013), vol. 103, p. 255-260 [2] Dufour, A., Castro-Diaz, M., (...) Snape, C., In situ analysis of biomass pyrolysis by high temperature rheology in relations with 1H NMR, Energy Fuels 26 (10), 6432-6441, 2012. [3] Dufour, A., (...) Billaud F., Mauviel, G., Qi, F. Revealing the chemistry of biomass pyrolysis by means of tunable synchrotron photoionisation - mass spectrometry, RSC Advances 3(14), 4786-4792, 2013. [4] Abdelouahed, L., Authier, O., Mauviel, G., (...) Dufour, A., Detailed modeling of biomass gasification in dual fluidized bed reactors under Aspen Plus, Energy Fuels 26 (6), 3840-3855, 2012. [5] Olcese, R.N., Francois, J., Bettahar, M.M., Petitjean, D., Dufour, A., Hydrodeoxygenation of guaiacol, a surrogate of lignin pyrolysis vapors, over iron based catalysts: Kinetics and modeling of the lignin to aromatics integrated process, Energy Fuels 27(2), 975-984, 2013.
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hal-00994839 , version 1 (22-05-2014)

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Guillain Mauviel, Anthony Dufour, Jacques Lede, Gabriel Wild, Francis Billaud. Current research done on thermochemical conversion of biomass at LRGP - Nancy. FCW2014 (Franco-Chinese Workshop on Processes for Energy and Environmental Issues), Jun 2014, Albi, France. ⟨hal-00994839⟩
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