@article {1875, title = { Hydrothermal conversion of wood, organosolv, and chlorite pulps }, journal = { BIOMASS CONVERSION AND BIOREFINERY }, volume = {10}, year = {2020}, pages = {1-13}, abstract = {

In this work, beech wood has been submitted to fractionation and hydrothermal liquefaction in order to produce fermentable carbohydrates. Fractionation either by ethanol organosolv or by sodium chlorite/acetic acid (SC/AA) treatment allowed obtaining delignification yields of 50 and 91 wt.\% respectively. The recovered pulps were then submitted to liquefaction in hot-compressed water (HCW). Three temperatures were studied: 180, 200, and 220 degrees C during 2 h. The same experiments were conducted on untreated beech and model cellulose (Avicel PH-101). Product yields and total carbohydrates were determined. The liquefaction products, i.e., solid residue, water-soluble compounds, and permanent gas, were analyzed respectively by X-ray diffraction (XRD), high-performance anion-exchange chromatography with pulsed amperometric detector (HPAEC-PAD), and gas chromatography (GC). SC/AA treatment allowed a high recovery of hemicelluloses and for this reason, xylose content was significantly higher than for the organosolv pulp. The maximum yields of total carbohydrates (based on the initial carbohydrates in wood), found when the liquefaction temperature was 220 degrees C, increased from 9.0 wt.\% for the raw beech to 13.5 and 33.7 wt.\% for the organosolv and SC/AA pulps respectively.

}, url = {https://hal.univ-lorraine.fr/hal-02125963}, author = {F. BUENDIA-KANDIA and N. BROSSE and D. PETITJEAN and G. MAUVIEL and E. RONDAGS and E. GUEDON and A. DUFOUR} } @article {1685, title = { Fast Pyrolysis of Heartwood, Sapwood, and Bark: A Complementary Application of Online Photoionization Mass Spectrometry and Conventional Pyrolysis Gas Chromatography/Mass Spectrometry }, journal = { ENERGY \& FUELS }, volume = {31}, year = {2017}, pages = {4078-4089}, abstract = {

Wood offers important potential for biofuel or chemical production by fast pyrolysis but exhibits variable chemical composition that impacts pyrolysis product composition. Here, fast pyrolysis of heartwood, sapwood, and bark isolated from Douglas fir (softwood) and oak (hardwood) was studied by a microfluidized bed reactor (MFBR) combined with single photoionization mass spectrometry (SPI-MS) to provide insights into the wood zone effects on the composition of pyrolysis volatiles. The difference in pyrolysis volatile composition has been clearly unraveled by principle component analysis (PCA) based on the major ions detected by SPI-MS. Some specific product markers have been defined for each wood zone (heartwood, sapwood, and bark) and related to the chemical composition of wood samples (lignin, carbohydrates, and minerals). The catalytic effect of minerals (notably potassium) has a higher impact on carbohydrate decomposition than on lignin decomposition for a given wood type. Therefore, sapwood and heartwood (for both oak and Douglas fir) can be clearly discriminated by specific markers mainly from carbohydrate pyrolysis. Interestingly, our results show that the wood cylinders exhibit a more marked wood zone effect on product compositions compared to fine powders. SPI-MS results were further compared to those of, pyrolysis gas chromatography/mass spectrometry (Py-GC/MS), and many of them are consistent. MFBR combined with SPI-MS is a selective analytical technique to figure out the effect of wood composition on pyrolysis volatiles.

}, url = {https://hal.univ-lorraine.fr/hal-01923645}, author = {L.Y. JIA and F. BUENDIA-KANDIA and S. DUMARCAY and H. POIROT and G. MAUVIEL and P. GERARDIN and A. DUFOUR} } @article {1652, title = { Mechanisms of biomass pyrolysis studied reactor with advanced gas analysis by combining a fixed bed }, journal = { JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS }, volume = {117}, year = {2016}, pages = {334-346}, abstract = {

Slow pyrolysis of different biomasses (miscanthus, douglas fir and oak) was conducted in a U-shape fixed bed reactor combined to (1) on-line analysis of the vapors (primary tar) by soft photoionisation mass spectrometry (single photoionisation time-of-flight mass spectrometer, SPI-TOFMS), (2) quantitative off-line analysis of condensed vapors by GC*GC/MS-FID and (3) permanent gas analysis. The U-shape fixed bed reactor allows controlling external mass transfers, temperature of the bed, quenching char at targeted temperatures and quantifying mass balances. The mass yields in solid, condensable products and gas are studied between 200 degrees C and 500 degrees C. The soft on-line photoionisation analysis leads to a more interpretable mass spectra with few fragment ions and gives the evolution of the main markers of volatiles produced in real-time as a function of the temperature. The chemical structure of the markers analyzed on-line by SPI-TOFMS is assigned by GC*GC/FID-MS analysis. The mechanisms of hemicelluloses, cellulose and lignin pyrolysis in the complex network of biomass (including minerals catalytic effect) are discussed.

}, url = {https://hal.univ-lorraine.fr/hal-01923764}, author = {Y. LE-BRECH and L.Y. JIA and S. CISSE and G. MAUVIEL and N. BROSSE and A. DUFOUR} } @article {1569, title = { Segregation of wood particles in a bubbling fluidized bed }, journal = { FUEL PROCESSING TECHNOLOGY }, volume = {133}, year = {2015}, pages = {80-88}, abstract = {

Understanding wood segregation in bubbling fluidized beds is of importance for the global analysis, comprehensive modeling, and scale-up of bubbling fluidized bed biomass gasifiers. This study presents measurements of voidage and segregation taken during experiments in fluidized beds containing inert materials mixed with biomass particles, The features of the wood particles affect the bed axial homogeneity; a small particle size or a high density increase homogeneity. When gas fluidization velocity is low, the biomass particles are more segregated from olivine compared to the results achieved with larger velocities. In all experiments, a significant portion of the wood remains within the bed (50-80\%), while the rest of the biomass floats at the bed surface. The experimental modeling accurately represents the voidage of the bed, with the exception of the upper part of the bed and the floating portion of the biomass particles. The results of the present study are in agreement with recent publications.

}, url = {https://hal.univ-lorraine.fr/LERMAB-UL/hal-01250404}, author = {B. CLUET and G. MAUVIEL and Y. ROGAUME and O. AUTHIER and A. DELEBARRE} } @article {1221, title = {Segregation of wood particles in a bubbling fuidized bed.}, journal = {Fuel Processing Technology}, volume = {133}, year = {2014}, month = {2014}, chapter = {80}, author = {B. CLUET and G. MAUVIEL and Y. ROGAUME and O. AUTHIER and A. DELABARRE} } @article {617, title = {Detailed process modeling of a wood gasification combined heat and power plant}, journal = { Biomass \& Bioenergy}, volume = {51}, year = {2013}, month = {2013}, chapter = {68-82}, author = {J. FRANCOIS and L. ABDELOUAHED and G. MAUVIEL and F. PATISSON and O. MIRGAUX and C. ROGAUME and Y. ROGAUME and M. FEIDT and A. DUFOUR} } @article {618, title = {Modeling of a Biomass Gasification CHP Plant: Influence of Various Parameters on Energetic and Exergetic Efficiencies}, journal = {Energy \& Fuels}, volume = {27}, year = {2013}, month = {2013}, chapter = {7398-7412}, author = {J. FRANCOIS and G. MAUVIEL and M. FEIDT and C. ROGAUME and Y. ROGAUME and O. MIRGAUX and F. PATISSON and A. DUFOUR} } @article {594, title = {Revealing the chemistry of biomass thermal conversion by means of tunable synchrotron ionisation - mass spectrometry}, journal = {RCS Advances}, volume = {3}, year = {2013}, month = {2013}, chapter = {4786-4792}, author = {A. DUFOUR and J. WENG and L. JIA and X. TANG and R. FOURNET and N. BROSSE and B. SIRJEAN and G. MAUVIEL and F. QI} }