Results 31 to 40 of about 9,508 (161)

Effect of Lignin, Humins, and Biomass‐Derived Acids on Kinetics of Catalytic Hydroxymethylfurfural Production during Saccharide Dehydration Reactions

ChemSusChem, Volume 18, Issue 24, December 13, 2025.
(Hemi)celluloses, abundant in lignocellulosic biomass, can be hydrolyzed and dehydrated into furanics like 5‐hydroxymethylfurfural (5‐HMF) and levulinic acid. Despite its potential, 5‐HMF production remains limited by inefficiencies, notably humin formation.
Ana Jakob, Blaž Likozar, Miha Grilc
wiley   +1 more source

Agglomeration mechanism during the preparation of nickel(0) and iron(0) zeolites [PDF]

, 1984
Magnetization measurements have been used to study the reduction process of Ni - zeolites and the thermal decomposition of iron pentacarbonyl adsorbed on NaY zeolites .
Bein, Thomas, Jacobs, Peter A., Ohlerich, U., Olsen, David, Schmidt, Friedrich   +4 more
core   +1 more source

Promoting light hydrocarbons yield by catalytic hydrodechlorination of residual chloromethanes using palladium supported on zeolite catalysts [PDF]

, 2020
Gas catalytic hydrodechlorination (HDC) of trichloromethane (TCM) and dichloromethane (DCM) was analyzed using Pd (1 wt.%) on different zeolites as catalysts.
Bedia, Jorge, Fernandez-Ruiz, Carlos, Grau, Javier Mario, Gómez-Sainero, Luisa María, Rodríguez, Daniel, Rodríguez, Juan José, Romero, Ana Clara   +6 more
core   +2 more sources

Advancing from MOFs and COFs to Functional Macroscopic Porous Constructs

Advanced Materials, Volume 37, Issue 52, December 29, 2025.
This review study investigates the recent progress and methodologies for manufacturing metal–organic framework (MOF) or covalent–organic framework (COF)‐based 3D structured macroscopic porous constructs with high structural integrity, providing the possibility to control their porosity across dimensions.
Seyyed Alireza Hashemi, Ahmadreza Ghaffarkhah, Ali Akbar Isari, Mahyar Panahi‐Sarmad, Feng Jiang, Orlando J. Rojas, Stefan Wuttke, Mircea Dincă, Mohammad Arjmand   +8 more
wiley   +1 more source

Physicochemical Characterization of Solid Catalysts: Morphological, Structural, Textural, Reducibility, and Acid‐Base Insights

ChemCatChem, Volume 17, Issue 23, December 8, 2025.
This review provides a practical guide for the characterization of solid catalysts, emphasizing key techniques such as SEM, TEM, XRD, Raman spectroscopy, and gas physisorption. It also covers reducibility and acid‐based analyses through TPR, TPD, and FTIR.
Luis A. Gallego‐Villada, Julieth T. García‐Sánchez, Gabriela Lauer, Päivi Mäki‐Arvela, Julián E. Sánchez‐Velandia, Dmitry Yu. Murzin   +5 more
wiley   +1 more source

Low Levels of Zinc Exchanged into Cu‐SSZ‐13 Increase Methanol Production in the Partial Oxidation of Methane to Methanol

ChemistryOpen, Volume 14, Issue 12, December 2025.
A little zinc helps! The addition of small quantities of zinc to Cu‐SSZ‐13 leads to a significant enhancement in methanol production in the partial oxidation of methane to methanol. Cu‐SSZ‐13 is currently used industrially for the selective catalytic reduction of nitric oxides and has shown potential for the direct oxidation of methane to methanol ...
Motunrayo Ogunleye, Hridita Purba Saha, Ayman M. Karim, Daniel F. Shantz   +3 more
wiley   +1 more source

Synthesis of oligo- and polythiophenes in zeolite hosts [PDF]

, 1993
Oligomers and polymers of thiophene derivatives were synthesized in the channels of zeolite Y and mordenite. Intrazeolite oxidation of monomers such as thiophene , 3- methylthiophene , and bithiophene by Fe(lll) or Cu(ll) ions results in formation of ...
Bein, Bein, Cai, Caspar, Colaneri, Cox, Dian, Enzel, Enzel, Hotta, Inoue, Kanatzidis, Mermilliod-Thevenin, Murray, Neugebauer, Osterholm, Pearce, Salmon   +17 more
core   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès, Guillem Gisbert, Helena Albert, Adelina Geyer, Meritxell Aulinas, Raquel Arasanz, Jordi Ibañez‐Insa, Antonio Polo‐Sánchez, Antonio Álvarez‐Valero, Olga Prieto‐Ballesteros, Santiago Giralt   +10 more
wiley   +1 more source

X‐ray data reconstruction from incomplete data sampling

Journal of Applied Crystallography, Volume 58, Issue 6, Page 2090-2104, December 2025.
A reconstruction procedure for patterns with incomplete information is reported. It is based on a modified Papoulis–Gerchberg algorithm. The modifications were introduced to guide the reconstruction procedure. The reconstruction algorithm could prove useful in specific experimental geometry setups.For specific setups, a diffraction pattern can contain ...
Kárel García Medina, Ernesto Estevez Rams, Reinhard B. Neder   +2 more
wiley   +1 more source

Evidences of the Stabilization for Weeks of the Benzyl Cation in Zeolites

ChemistryEurope, Volume 3, Issue 6, November 11, 2025.
The benzyl cation is plausibly formed inside zeolites after rearrangement of individually isolated tropylium cations at room temperature. The benzyl cation–entrapped zeolite is stable for weeks without any storage precaution, and a solid–state 13C nuclear magnetic resonance spectrum of this iconic carbocation could be recorded.
Francesco Orlando, Raúl Pérez–Ruíz, German Sastre, Antonio Leyva−Pérez   +3 more
wiley   +1 more source