Publications
105 results found
Rinaldi Sobrinho R, Reece J, 2013, Solution-Based Deconstruction of (Ligno)-Cellulose, Catalysis for the Conversion of Biomass and Its Derivatives, Editors: Behrens, Datye, Publisher: epubli, ISBN: 9783844242829
An introduction to the emerging field of biomass conversion.
Wang X, Rinaldi R, 2013, A route for lignin and bio-oil conversion: Dehydroxylation of phenols into arenes by catalytic tandem reactions, Angewandte Chemie - International Edition, Vol: 52, Pages: 11499-11503
Loerbroks C, Rinaldi R, Thiel W, 2013, The electronic nature of the 1,4-β-glycosidic bond and its chemical environment: DFT insights into cellulose chemistry, Chemistry - A European Journal, Vol: 19, Pages: 16282-16294
Carrasquillo-Flores R, Käldström M, Schüth F, et al., 2013, Mechanocatalytic depolymerization of dry (Ligno)cellulose as an entry process for high-yield production of furfurals, ACS Catalysis, Vol: 3, Pages: 993-997
Hilgert J, Meine N, Rinaldi R, et al., 2013, Mechanocatalytic depolymerization of cellulose combined with hydrogenolysis as a highly efficient pathway to sugar alcohols, Energy and Environmental Science, Vol: 6, Pages: 92-96
Wang X, Rinaldi R, 2012, Exploiting H-transfer reactions with RANEY® Ni for upgrade of phenolic and aromatic biorefinery feeds under unusual, low-severity conditions, Energy and Environmental Science, Vol: 5, Pages: 8244-8260
Wang X, Rinaldi R, 2012, Erratum: Solvent effects on the hydrogenolysis of diphenyl ether with raney nickel and their implications for the conversion of lignin (ChemSusChem (2012) 5 (1455-1456) DOI: 10.1002/cssc.201200040), ChemSusChem, Vol: 5
Meine N, Rinaldi R, Schüth F, 2012, Solvent-Free catalytic depolymerization of cellulose to water-soluble oligosaccharides, ChemSusChem, Vol: 5, Pages: 1449-1454
Rinaldi R, 2012, Reply to "comment on 'instantaneous dissolution of cellulose in organic electrolyte solutions'", Journal of Chemical and Engineering Data, Vol: 57, Pages: 1341-1343
Wang X, Rinaldi R, 2012, Solvent effects on the hydrogenolysis of diphenyl ether with raney nickel and their implications for the conversion of lignin, ChemSusChem, Vol: 5, Pages: 1455-1466
Jäger G, Girfoglio M, Dollo F, et al., 2011, How recombinant swollenin from Kluyveromyces lactis affects cellulosic substrates and accelerates their hydrolysis, Biotechnology for Biofuels, Vol: 4, ISSN: 1754-6834
Background: In order to generate biofuels, insoluble cellulosic substrates are pretreated and subsequentlyhydrolyzed with cellulases. One way to pretreat cellulose in a safe and environmentally friendly manner is to apply,under mild conditions, non-hydrolyzing proteins such as swollenin - naturally produced in low yields by the fungusTrichoderma reesei. To yield sufficient swollenin for industrial applications, the first aim of this study is to present anew way of producing recombinant swollenin. The main objective is to show how swollenin quantitatively affectsrelevant physical properties of cellulosic substrates and how it affects subsequent hydrolysis.Results: After expression in the yeast Kluyveromyces lactis, the resulting swollenin was purified. The adsorptionparameters of the recombinant swollenin onto cellulose were quantified for the first time and were comparable tothose of individual cellulases from T. reesei. Four different insoluble cellulosic substrates were then pretreated withswollenin. At first, it could be qualitatively shown by macroscopic evaluation and microscopy that swollenin causeddeagglomeration of bigger cellulose agglomerates as well as dispersion of cellulose microfibrils (amorphogenesis).Afterwards, the effects of swollenin on cellulose particle size, maximum cellulase adsorption and cellulose crystallinitywere quantified. The pretreatment with swollenin resulted in a significant decrease in particle size of the cellulosicsubstrates as well as in their crystallinity, thereby substantially increasing maximum cellulase adsorption onto thesesubstrates. Subsequently, the pretreated cellulosic substrates were hydrolyzed with cellulases. Here, pretreatment ofcellulosic substrates with swollenin, even in non-saturating concentrations, significantly accelerated the hydrolysis. Bycorrelating particle size and crystallinity of the cellulosic substrates with initial hydrolysis rates, it could be shown thatthe swollenin-induced reduction in particle
Engel P, Bonhage B, Pernik D, et al., 2011, Population balance modelling of homogeneous and heterogeneous cellulose hydrolysis
Rinaldi R, 2011, Instantaneous dissolution of cellulose in organic electrolyte solutions, Chemical Communications, Vol: 47, Pages: 511-513
Jäger G, Wu Z, Garschhammer K, et al., 2010, Practical screening of purified cellobiohydrolases and endoglucanases with α-cellulose and specification of hydrodynamics, Biotechnology for Biofuels, Vol: 3, ISSN: 1754-6834
Background: It is important to generate biofuels and society must be weaned from its dependency on fossil fuels.In order to produce biofuels, lignocellulose is pretreated and the resulting cellulose is hydrolyzed by cellulases suchas cellobiohydrolases (CBH) and endoglucanases (EG). Until now, the biofuel industry has usually appliedimpractical celluloses to screen for cellulases capable of degrading naturally occurring, insoluble cellulose. Thisstudy investigates how these cellulases adsorb and hydrolyze insoluble a-cellulose − considered to be a morepractical substrate which mimics the alkaline-pretreated biomass used in biorefineries. Moreover, this studyinvestigates how hydrodynamics affects cellulase adsorption and activity onto a-cellulose.Results: First, the cellulases CBH I, CBH II, EG I and EG II were purified from Trichoderma reesei and CBH I and EG Iwere utilized in order to study and model the adsorption isotherms (Langmuir) and kinetics (pseudo-first-order).Second, the adsorption kinetics and cellulase activities were studied under different hydrodynamic conditions,including liquid mixing and particle suspension. Third, in order to compare a-cellulose with three typically usedcelluloses, the exact cellulase activities towards all four substrates were measured.It was found that, using a-cellulose, the adsorption models fitted to the experimental data and yielded parameterscomparable to those for filter paper. Moreover, it was determined that higher shaking frequencies clearly improvedthe adsorption of cellulases onto a-cellulose and thus bolstered their activity. Complete suspension of a-celluloseparticles was the optimal operating condition in order to ensure efficient cellulase adsorption and activity. Finally,all four purified cellulases displayed comparable activities only on insoluble a-cellulose.Conclusions: a-Cellulose is an excellent substrate to screen for CBHs and EGs. This current investigation shows indetail, for the first time, the ads
Palkovits R, Tajvidi K, Procelewska J, et al., 2010, Hydrogenolysis of cellulose combining mineral acids and hydrogenation catalysts, Green Chemistry, Vol: 12, Pages: 972-978
Liu Y, Tüysüz H, Jia CJ, et al., 2010, From glycerol to allyl alcohol: Iron oxide catalyzed dehydration and consecutive hydrogen transfer, Chemical Communications, Vol: 46, Pages: 1238-1240
Rinaldi R, Meine N, vom Stein J, et al., 2010, Which controls the depolymerization of cellulose in ionic liquids: The solid acid catalyst or cellulose?, ChemSusChem, Vol: 3, Pages: 266-276
Rinaldi R, 2010, Sofja Kovalevskaja Award for Roberto Rinaldi, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 49, Pages: 8560-8560, ISSN: 1433-7851
Rinaldi R, Engel P, Büchs J, et al., 2010, An integrated catalytic approach to fermentable sugars from cellulose, ChemSusChem, Vol: 3, Pages: 1151-1153
Ferreira AP, Zanchet D, Rinaldi R, et al., 2010, Effect of the CeO2 content on the surface and structural properties of CeO2-Al2O3 mixed oxides prepared by sol-gel method, Applied Catalysis A: General, Vol: 388, Pages: 45-56
Meine N, Benedito F, Rinaldi R, 2010, Thermal stability of ionic liquids assessed by potentiometric titration, Green Chemistry, Vol: 12, Pages: 1711-1714
Rinaldi R, Porcari ADM, Rocha TCR, et al., 2009, Construction of heterogeneous Ni catalysts from supports and colloidal nanoparticles - A challenging puzzle, Journal of Molecular Catalysis A: Chemical, Vol: 301, Pages: 11-17
Rinaldi R, Schüth F, 2009, Design of solid catalysts for the conversion of biomass, Energy and Environmental Science, Vol: 2, Pages: 610-626
Buffon R, Rinaldi R, 2009, Surface Organometallic Chemistry of d(0) Metal Complexes, Modern Surface Organometallic Chemistry, Pages: 417-453
Rinaldi R, Schüth F, 2009, Acid hydrolysis of cellulose as the entry point into biorefinery schemes, ChemSusChem, Vol: 2, Pages: 1096-1107
Rinaldi R, de Oliveira HFN, Schumann H, et al., 2009, Homogeneously catalyzed epoxidation of α,β-unsaturated ketones using simple aluminum salts and aqueous H2O2-Is it possible?, Journal of Molecular Catalysis A: Chemical, Vol: 307, Pages: 1-8
Rinaldi R, Palkovits R, Schüth F, 2008, Heterogeneous catalysis for the production of fuels and chemicals from lignocellulosic feedstocks, DGMK Tagungsbericht, Pages: 161-168
Rinaldi R, Palkovits R, Schüth F, 2008, Depolymerization of cellulose using solid catalysts in ionic liquids, Angewandte Chemie - International Edition, Vol: 47, Pages: 8047-8050
Steffen RA, Teixeira S, Sepulveda J, et al., 2008, Alumina-catalyzed Baeyer-Villiger oxidation of cyclohexanone with hydrogen peroxide, Journal of Molecular Catalysis A: Chemical, Vol: 287, Pages: 41-44
Rinaldi R, Volpe PLO, Torriani IL, 2008, l-Tryptophan transport through a hydrophobic liquid membrane using AOT micelles: Dynamics of the process as revealed by small angle X-ray scattering, Journal of Colloid and Interface Science, Vol: 318, Pages: 59-67
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