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Moulijn, J.A. (author), van Ommen, J.R. (author), Goulas, A. (author), Valdesueiro Gonzalez, D. (author), Juan-Alcañiz, Jana (author), Au-Yeung, Kar Ming (author), Woning, Leo (author), Bergwerff, Jaap A. (author)The feasibility of gas phase deposition using a Ti alkoxide precursor for precise surface modification of catalysts was demonstrated by modifying a mesoporous alumina support with a Ti oxide overcoat. Titanium tetra-isopropoxide yields a Ti oxide layer that covers homogeneously the alumina surface. Uniformity of the deposited TiO<sub>2</sub>...journal article 2023
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Zhao, Guofeng (author), Moulijn, J.A. (author), Kapteijn, F. (author), Dautzenberg, Frits M. (author), Xu, Bin (author), Lu, Yong (author)Heterogeneous catalysis plays a pivotal role in the current chemical and energy vectors production. Notably, to fully utilize the intrinsic activity and selectivity of a catalyst, the chemical reactor has to be designed and operated optimally to achieve enhanced heat/mass transfer, well-defined contact time of reactants, uniform flow pattern,...journal article 2023
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Zhang, Zheng (author), Santangelo, Diana L. (author), ten Brink, Gert (author), Kooi, Bart J. (author), Moulijn, J.A. (author), Melián-Cabrera, Ignacio (author)The authors regret that the original graphical abstract contained an error by accident. In particular, the values of the OH density for the calcined SBA-15 and solvent-&-Fenton-treated SBA-15 were swapped. These values contradict the main message of the study. The values contained in the paper are however correct. In summary, the paper's...journal article 2022
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Kapteijn, F. (author), Moulijn, J.A. (author)In this perspective paper a brief overview is given of the past developments in the field of structured catalysts and reactors, the potential for process intensification, energy and materials efficiency. Current exciting new developments for demanding processes are highlighted and directions indicated that contribute to a future sustainable...journal article 2020
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Márquez, Nathalie (author), Moulijn, J.A. (author), Makkee, M. (author), Kreutzer, M.T. (author), Castaño, Pedro (author)We describe the co-current flow pattern of gas and liquid through micro-fabricated beds of solid and pillars under variable (i) capillary number, (ii) contact angle or wettability and (iii) pillar arrangement, i.e. modifying the distance between pillars or their size and comparing regular with more chaotic systems. Laser-induced fluorescent...journal article 2019
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Melián-Cabrera, Ignacio (author), Espinosa, Silvia (author), Mentruit, Cristina (author), Murray, Blaine (author), Falco, Lorena (author), Socci, Joseph (author), Kapteijn, F. (author), Moulijn, J.A. (author)An efficient process is reported for preparing a state-of-the-art Fe-ferrierite catalyst for N<sub>2</sub>O decomposition under industrial tail-gas conditions. In the synthesis procedure, we evaluate the very demanding constraints for scale-up; i.e. large reactor volumes are typically needed, and long processing times and considerable amounts...journal article 2018
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Moonen, Roel (author), Ras, Erik Jan (author), Harvey, Clare (author), Alles, Jeroen (author), Moulijn, J.A. (author)Small-scale parallel trickle-bed reactors were used to evaluate the performance of a commercial hydrodesulfurization catalyst under industrially relevant conditions. Catalyst extrudates were loaded as a single string in reactor tubes. It is demonstrated that product sulfur levels and densities obtained with the single-pellet-string reactor...journal article 2017
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Bui, H.V. (author), Grillo, F. (author), Kulkarni, S.S. (author), Bevaart, Ronald (author), Nguyên, V.T. (author), van der Linden, B. (author), Moulijn, J.A. (author), Makkee, M. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)We tailored the size distribution of Pt nanoparticles (NPs) on graphene nanoplatelets at a given metal loading by using low-temperature atomic layer deposition carried out in a fluidized bed reactor operated at atmospheric pressure. The Pt NPs deposited at low temperature (100 °C) after 10 cycles were more active and stable towards the...journal article 2017
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Grillo, F. (author), Bui, H.V. (author), Moulijn, J.A. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)We present an atomistic understanding of the evolution of the size distribution with temperature and number of cycles in atomic layer deposition (ALD) of Pt nanoparticles (NPs). Atomistic modeling of our experiments teaches us that the NPs grow mostly via NP diffusion and coalescence rather than through single-atom processes such as precursor...journal article 2017
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van den Bergh, Johan (author), Babich, Igor V. (author), O'Connor, Paul (author), Moulijn, J.A. (author)ZnCl2 hydrate, the main molten salt used in biomass conversion, combined with low concentration HCl is an excellent solvent for the dissolution and hydrolysis of the carbohydrates present in lignocellulosic biomass. The most recalcitrant carbohydrate, cellulose, is dissolved in a residence time less than 1 h under mild conditions without...journal article 2017
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Skupien, E. (author), Berger, R.J. (author), Santos, V.P. (author), Gascon, J. (author), Makkee, M. (author), Kreutzer, M.T. (author), Kooyman, P.J. (author), Moulijn, J.A. (author), Kapteijn, F. (author)Benzyl alcohol oxidation was carried out in toluene as solvent, in the presence of the potentially inhibiting oxidation products benzaldehyde and benzoic acid. Benzoic acid, or a product of benzoic acid, is identified to be the inhibiting species. The presence of a basic potassium salt (K2CO3 or KF) suppresses this inhibition, but promotes the...journal article 2014
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Li, J. (author), Soares, H.S.M.P. (author), Moulijn, J.A. (author), Makkee, M. (author)The hydrolysis and hydrogenation of cellobiose (4-O-b-D-glucopyranosyl-D-glucose) in ZnCl2_4H2O solvent was studied to optimize the conditions for conversion of lignocellulose (the most abundant renewable resource) into sorbitol (D-glucitol). Water at neutral pH does not allow hydrolysis of cellobiose under the conditions of the experiments (up...journal article 2013
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Li, J. (author), Spina, A. (author), Moulijn, J.A. (author), Makkee, M. (author)The sorbitol conversion in a molten salt hydrate medium (ZnCl2; 70 wt% in water) was studied. Dehydration is the main reaction, initially 1,4- and 3,6-anhydrosorbitol are the main products that are subsequently converted into isosorbide; two other anhydrohexitols, (1,5- and 2,5-), formed are in less amounts and do not undergo further dehydration...journal article 2013
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Bakker, J.J.W. (author), Zieverink, M.M.P. (author), Kapteijn, F. (author), Moulijn, J.A. (author), Kreutzer, M.T. (author)Segmented flow in standard GC capillary columns, with a heterogeneous Pd catalyst on the walls, gave rapid information about catalytic processes in them. The residence time and conversion was monitored visually, greatly simplifying bench-scale optimization. Examples show the benefits of the elimination of pore diffusion and axial dispersion....journal article 2011
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Almeida, A.R. (author), Berger, R. (author), Moulijn, J.A. (author), Mul, G. (author)The rate of cyclohexane photo-catalytic oxidation to cyclohexanone over anatase TiO2 was studied at temperatures between 23 and 60ºC by in situ ATR-FTIR spectroscopy, and the kinetic parameters were estimated using a microkinetic model. At low temperatures, surface cyclohexanone formation is limited by cyclohexane adsorption due to unfavorable...journal article 2010
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Carneiro, J.T. (author), Yang, C.C. (author), Moma, J.A. (author), Moulijn, J.A. (author), Mul, G. (author)Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m?2 BET) on Hombikat, suggesting that the amount of...journal article 2009
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Groen, J.C. (author), Moulijn, J.A. (author), Perez-Ramirez, J. (author)The invention is directed to a process for the preparation of a mesoporous mordenite, which process comprises subjecting a non-dealuminated mordenite having an atomic ratio of framework Si-to-Al of least, to an alkaline treatment in order to create mesoporosity by removal of silicon, to various mesoporous mordenites and to their use.patent 2008
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Enabling Electrocatalytic Fischer–Tropsch Synthesis from Carbon Dioxide Over Copper-based ElectrodesShibata, H. (author), Moulijn, J.A. (author), Mul, G. (author)We report on the discovery that paraffins and olefins up to C6 hydrocarbons can be obtained in CO2 electroreduction at room temperature and atmospheric pressure by application of a commercially available Cu-electrode (Eurofysica), provided pretreatment by electropolishing is avoided. The product distribution follows the Schultz–Flory...journal article 2008
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De Lathouder, K.M. (author), Smeltink, M.W. (author), Straathof, A.J.J. (author), Paasman, M.A. (author), Van de Sandt, E.J.A.X. (author), Kapteijn, F. (author), Moulijn, J.A. (author)The objective of this work was to develop a hydrogel-coated monolith for the entrapment of penicillin G acylase (E. coli, PGA). After screening of different hydrogels, chitosan was chosen as the carrier material for the preparation of monolithic biocatalysts. This protocol leads to active immobilized biocatalysts for the enzymatic hydrolysis of...journal article 2008
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Van Miltenburg, A. (author), Gascon, J. (author), Zhu, W. (author), Kapteijn, F. (author), Moulijn, J.A. (author)The adsorption of propylene and propane on zeolite NaX with and without a saturated (36 wt%) amount of CuCl have been investigated. The single component adsorption isotherms could be well described with a Dual-Site Langmuir model. The dispersion of CuCl results in a decrease of the maximum adsorption capacity of the zeolite for both components....journal article 2008