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Le Touquet – Paris-Plage, France

Garron A.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Maksoud W.A.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Larabi C.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Arquilliere P.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | And 3 more authors.
Catalysis Today | Year: 2014

The direct catalytic thermo-catalytic transformation of wood in presence of molecular hydrogen has been demonstrated. The resulting organic liquid consists of saturated alkanes and aromatics and was obtained with a yield up to 30wt.%. Importantly, the oxygen content is about 3wt.% (<5wt.% required for bio-fuel formulation) and has a Higher Heating Value of 41MJkg-1 which is very close to standard diesel (44MJkg-1) used in automotive fuel. The catalysts comprise multi-functional Cu-Ru supported on Cs exchanged heteropolyacid (H3PW12O40 and H3PMo12O40), featuring depolymerisation, deoxygenation and hydrogenation in a single batch reactor. Current results present an alternative approach to convert highly oxygenated lignocellulosic biomass to a low oxygenated organic liquid suitable as additives in biofuels, in one step and one reactor. © 2014 Elsevier B.V.


Larabi C.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | al Maksoud W.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Szeto K.C.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Roubaud A.,CEA Grenoble | And 3 more authors.
Bioresource Technology | Year: 2013

Transformation of lignocellulosic biomass to biofuels involves multiple processes, in which thermal decomposition, hydrotreatment are the most central steps. Current work focuses on the impact of several solid acids and Keggin-type heteropolyacids on the decomposition temperature (Td) of pine wood and the characterization of the resulted products. It has been observed that a mechanical mixture of solid acids with pine wood has no influence on Td, while the use of heteropolyacids lower the Td by 100°C. Moreover, the treatment of biomass with a catalytic amount of H3PW12O40 leads to formation of three fractions: solid, liquid and gas, which have been investigated by elemental analysis, TGA, FTIR, GC-MS and NMR. The use of heteropolyacid leads, at 300°C, to a selective transformation of more than 50wt.% of the holocellulose part of the lignocellulosic biomass. Moreover, 60wt.% of the catalyst H3PW12O40 are recovered. © 2013 Elsevier Ltd.


Al Maksoud W.,University Claude Bernard Lyon 1 | Larabi C.,University Claude Bernard Lyon 1 | Garron A.,University Claude Bernard Lyon 1 | Szeto K.C.,University Claude Bernard Lyon 1 | And 2 more authors.
Green Chemistry | Year: 2014

Direct catalytic conversion of pine wood under H2 into an organic liquid composed of saturated alkanes and aromatics has been achieved. The resulting organic liquids are easily isolated from the aqueous phase with a yield up to 30 wt%. Importantly, the oxygen content is about 3 wt% and has a higher heating value of 41 MJ kg-1 which is very close to standard diesel (44 MJ kg-1) used in automotive fuels. The multi-functional catalysts comprise well size controlled bimetallic nanoparticles (Cu-Ru) supported on heteropolyacid salts. The residual acidic proton of the heteropolyanion salt combined with bimetallic nanoparticles produced a multifunctional catalyst, featuring depolymerisation, deoxygenation and hydrogenation in a single batch reactor. Current results present an alternative approach to transform lignocellulosic biomass (oxygen content higher than 40 wt%) directly into an organic liquid (oxygen content less than 5 wt%) suitable as additives in biofuels. This journal is © the Partner Organisations 2014.


Garron A.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Arquilliere P.P.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Maksoud W.A.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | Larabi C.,CNRS Laboratory of Chemistry, Catalysis, Polymers and Process | And 2 more authors.
Applied Catalysis A: General | Year: 2015

The conversion, in a sustainable way, of paper industry wastes such as black liquor into value-added molecules is still challenging. Herein, a direct catalytic conversion of black liquor into an aqueous solution has been achieved at moderate temperature and pressure (<250°C, 2 MPa). For this purpose, a multimetallic catalyst (Pd0.5/Ni1Cu1-Mg30AlOx) has been synthesized and fully characterized. In presence of this material, a carbon-based conversion of 12 wt.% has been obtained. The final liquid is composed of value-added phenolic compounds (i.e., guaiacol, creosol...) and the reaction can be afforded up to five cycles without deactivation. The green chemistry concept consists of extracting these compounds without the use of volatile solvent and in safe operating conditions. For these reasons, the use of hydrophobic ionic liquids for the liquid-liquid extraction of these phenols has been investigated. The influences of the side chains of symmetric and asymmetric imidazolium-NTf2 as well as operational conditions (stirring rate and temperature) have been studied. As a result, [C1C6Im][NTf2] has been found to be efficient in one-step total extraction phenolic components contained in the solution issued from the catalytic conversion of black liquor. This study showed that the catalytic hydropyrolysis of black liquor could be considered as an alternative source of phenolic compounds to conventional fossil resources. © 2015 Elsevier B.V. All rights reserved.


Larabi C.,University Claude Bernard Lyon 1 | Maksoud W.A.,University Claude Bernard Lyon 1 | Szeto K.C.,University Claude Bernard Lyon 1 | Boyron O.,University Claude Bernard Lyon 1 | And 4 more authors.
Journal of Analytical and Applied Pyrolysis | Year: 2013

The behavior of lignocellulose and the products released during decomposition under hydrogen or argon were investigated through two different approaches: (i) in situ techniques by TGA coupled with gas phase FTIR spectroscopy and temperature resolved DRIFTS with online GCMS. These techniques provide the decomposition profile, the evolution of the wood surface structure and identification of the released compounds. (ii) Ex situ experiments where three fractions (gas, liquid, solid) were obtained in notable quantity and separated after the decomposition. GC, GCMS, NMR, FTIR and elemental analysis were used to characterize the products. The combination of these characterization techniques showed that the decomposition of the pine wood starts from the holocellulosic part around 275 °C producing light oxygenated compounds such as furfural derivate. Lignin structure degrades at temperatures higher than 350 °C leading to formation of phenolic compounds. © 2012 Elsevier B.V.

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