Results 41 to 50 of about 8,053 (218)

Improving the efficiency of high-temperature processes for producing lower olefins via deep-processing of by-products [PDF]

open access: yes, 2016
Processes for producing lower olefins are critically examined. It is noted that pyrolysis of various types of hydrocarbon is still the main process of obtaining ethylene and propylene, and is accompanied by the formation of considerable amounts of by ...
Bondaletov, Vladimir Grigoryevich   +1 more
core   +2 more sources

Organic Photoelectrochemical Cells Beyond Performance: Interface and Catalyst Engineering for Durability

open access: yesAdvanced Energy Materials, EarlyView.
Organic photoelectrochemical cells based on π‐conjugated semiconductors offer a versatile platform for solar fuel generation. This review outlines operating principles, device architectures, and key metrics, and highlights advances in p‐ and n‐type photoelectrodes, interfacial engineering, and catalyst integration.
Jaehyeong Kim   +8 more
wiley   +1 more source

“Naked” Divalent Metal Cations Stabilized by Weakly Coordinating Anions: Syntheses, Properties, and Emerging Applications

open access: yesEuropean Journal of Inorganic Chemistry, Volume 29, Issue 14, 14 May 2026.
The preparation of soluble and stable metal M2+ dications only stabilized by weakly coordinating anions, that is, M[WCA]2 salts, is an emerging field that, beyond its fundamental interest, holds promise in reactivity due to the high electrophilicity of the central M2+ center.
Samuel Dagorne   +3 more
wiley   +1 more source

Process Modeling for Propylene Polymerization to Transfer Reaction Kinetics From Lab to Plant

open access: yesChemie Ingenieur Technik, Volume 98, Issue 5, Page 254-261, May 2026.
The modeling approach combines an industrial model for a fourth‐generation Ziegler–Natta catalyst with lab‐scale derived kinetics of a novel fifth‐generation catalyst. By transferring intrinsic kinetics across scales, polypropylene production can be predicted. Accurate melt flow rate prediction is only obtained with an additional adjustment.
Anna Konopka   +5 more
wiley   +1 more source

Modeling intraparticle transports during propylene polymerizations using supported metallocene and dual function metallocene as catalysts: Single particle model [PDF]

open access: yes, 2014
Two improved multigrain models (MGMs) for preparing homopolypropylene and long chain branched polypropylene via propylene polymerization using silica-supported metallocene or dual function metallocene as catalysts are presented in this paper ...
Che, Liming   +4 more
core   +1 more source

Electron Microscopy Transfer System to Protect Atmosphere‐Sensitive Materials for Scanning Electron Microscopy Characterization

open access: yesMicroscopy Research and Technique, Volume 89, Issue 5, Page 759-768, May 2026.
SEM–EDX and XRD characterization confirm that pouches made from readily available aluminum foil, used in combination with a commercial cryo‐EM transfer system, effectively protect highly atmosphere‐sensitive and/or hygroscopic materials from contamination during transfer from inert environments to the SEM vacuum chamber.
Louis G. Corcoran   +8 more
wiley   +1 more source

Gas fluidized bed polymerization. [PDF]

open access: yes, 2017
Edição dos ...
GAMBETTA, R.   +2 more
core  

A Silicon-Bridged Bis(substituted Cp) Yttrium Complex [PDF]

open access: yes, 1992
rac-Bis(tetrahydrofuran)lithium [bis(2-trimethylsilyl-4-tert-butyl-η^5-cyclopentadienyl)dimethylsilane] dichloroyttrate, [Li(C_4H_80)_2][Y(C_(26)H_(48)-Si_3)Cl_2], M_r= 755.87, triclinic, Pl, ɑ = 13.110 (8), b = 17.163 (15), c = 20.623 (14) Å, ɑ= 104.02 (
Bercaw, John E.   +3 more
core   +1 more source

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

open access: yesPolymer Engineering &Science, Volume 66, Issue 5, Page 3100-3141, May 2026.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan   +5 more
wiley   +1 more source

Comparative evaluation of different radical initiators, used for production of graft copolymers, based on atactic polypropylene [PDF]

open access: yes, 2017
The possibility of application of atactic polypropylene, which isn't used practically in Russian industry right now, is considered in this article.
Kotomkin, R. A.   +2 more
core   +2 more sources

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