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