Results 81 to 90 of about 98,475 (295)
Química Nova, 2009 This paper deals with an adosrption of sulphur compounds employing zeolites containing zinc. The zeolites employed were commercial NaY and Beta. The zinc was incorporated in three levels: 0.5; 1.0 and 5%. The sulphur compounds studied were benzothiophene
Álvaro L. Malvesti +4 more
doaj +1 more source
Intrazeolite assembly and pyrolysis of polyacrylonitrile [PDF]
, 1992 Radical polymerization of acrylonitrile within the pores of zeolites Y and mordenite produces intrazeolite polyacrylonitrile that can be pyrolysed to form conducting carbon ...
Bein, Thomas +2 more
core +1 more source
Radiation‐Resistant Kr‐Selective MOF With Record Kr/Xe Selectivity at Elevated Pressure
Advanced Science, EarlyView.ABSTRACT The separation of Kr/Xe from spent nuclear fuel off‐gas is critical, yet most current adsorbents exhibit Xe‐Kr co‐adsorption under elevated pressures, posing challenges for industrial pressure swing adsorption processes. Herein, we present and evaluate a metal‐organic framework, CALF‐20M‐w, engineered for molecular sieving separation of Kr/Xe ...
Qihang Tian +6 more
wiley +1 more source
Topology‐Dependent Coke Formation in the Catalytic Pyrolysis of Phenol Over HFAU and HZSM‐5 Zeolites
Angewandte Chemie, EarlyView.The coke formation and speciation during the catalytic pyrolysis of lignin over different zeolite topologies were studied with a combination of operando EPR spectroscopy and ex situ pulsed techniques aided with DFT calculations. Operando EPR data showed that the coke formation in HFAU is fast compared to HZSM‐5.
Jörg W. A. Fischer +6 more
wiley +2 more sources
Erionite-Na upon heating. Dehydration dynamics and exchangeable cations mobility [PDF]
, 2016 Erionite is a fibrous zeolite significantly more tumorigenic than crocidolite asbestos upon inhalation. In recent years, several papers have been published aimed at characterizing from the crystal-chemical point of view erionite fibres. As their toxicity
BALLIRANO, Paolo, PACELLA, Alessandro
core +1 more source
Autonomous and Continuous Atmospheric Water Harvesting Using Modified Wood
Advanced Science, EarlyView.A rigid, hydroxyl‐rich wood skeleton with graded channels is used as a multifunctional host to co‐incorporate a PNipam/PAA network and LiCl, creating a high‐performance sorbent for atmospheric water harvesting. The composite achieves rapid sorption, efficient low‐temperature desorption, and stable cycling, enabling a solar‐powered device with a high ...
Shiheng He +7 more
wiley +1 more source
Consequences of Medium‐Pore Zeolite Constraints for Alkene Cracking—The Case of n‐Pentene
Angewandte Chemie, EarlyView.Alkene cracking in medium‐pore zeolites is governed by a balance of enthalpic and entropic effects. Intrinsic barriers are quantified and shown to be lower than for alkanes due to stabilization of carbenium‐ion‐like transition states. Confinement and extra‐framework aluminum modulate reactivity by tuning transition‐state energetics, providing a ...
Ruixue Zhao +4 more
wiley +2 more sources
Synthesis of Rice Husk-Based Zeolit using Hydrothermal Method and Its Detergent Builder Properties [PDF]
, 2015 Detergents are cleaning agents that consist of a complex formulation such as surfactants, builders, bleaching, fillers and other additives.
Alfiansyah, A. +2 more
core +1 more source
Recent Advances in Zirconium‐Based Metal–Organic Framework Membranes for Desalination
Advanced Science, EarlyView.Zirconium‐based metal–organic framework membranes with tunable pore architectures, defect chemistry, and surface functionalities for Desalination are systematically reviewed. Their fabrication strategies, desalination performance across pressure‐driven, forward osmosis, and pervaporation processes, and structure–property–performance relationships are ...
Mao Fu +7 more
wiley +1 more source
Angewandte Chemie, EarlyView.High photon flux causes (re)distionpersion of atomic Pd species on TiO2 in photocatalytic experiments, whereas Pt SAs undergo continuous agglormation. This allows light‐driven stabilization of active Pd centers for sustained H2 evolution. ABSTRACT In recent years, the use of single atoms (SAs) has become increasingly significant in photocatalysis ...
Xin Zhou +6 more
wiley +2 more sources