Results 31 to 40 of about 1,569 (175)

Alkene Hydrogenation by a Cationic, Nine‐Coordinate Molybdenum(VI) Pentahydride Catalyst

Chemistry – A European Journal, EarlyView.
While late 3d metals dominate efforts to replace precious metals in homogeneous hydrogenation, molybdenum has remained largely ignored. This work reveals that a nine‐coordinate pentahydrido molybdenum complex can hydrogenate a broad range of alkenes efficiently, demonstrating that early‐metal polyhydrides can serve as genuine catalysts rather than mere
Arno Estival, Michel Sigrist, Nicolas Queyriaux, Jorge J. Cabrera‐Trujillo, Nina Durvin, Marie‐Christine Boegli, Laure Vendier, Mary Grellier, Karinne Miqueu, Antoine Simonneau   +9 more
wiley   +1 more source

THERMODYNAMICAL EFFICIENCY OF A DETONATION ENGINE

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2018
An attempt has been made to analyze qualitatively and quantitatively the thermodynamic cycle of detonative combustion and to compare it with the Otto and Brayton cycles in order to establish the degree of its thermodynamic perfection. A comparison of the
Alhussan Khaled, M. S. Assad, O. G. Penyazkov, I. I. Chernuho   +3 more
doaj   +1 more source

High‐Temperature Heat Pump Test Bench with n‐Butane (R‐600) Generating Steam

Chemie Ingenieur Technik, EarlyView.
This work involves building a test bench for a high‐temperature heat pump (HTHP) and analyzing the measurements. The focus is on steam generation using an HTHP to decarbonize process steam demand. The findings indicate that stable steam generation is possible, providing a higher heat transfer coefficient in the heat pump's condenser.
Sebastian Benkert, Lukas Joos, Ursula Wittstadt, Torsten Will, Andreas Burger, Lena Schnabel, Stefan Henninger, Thorsten Klahm   +7 more
wiley   +1 more source

Preliminary prospects of a Carnot-battery based on a supercritical CO2 Brayton cycle

Acta Polytechnica, 2021
As a part of the change towards a higher usage of renewable energy sources, which naturally deliver the energy intermittently, the need for energy storage systems is increasing. For the compensation of the disturbance in power production due to inter-day
Karin Rindt, František Hrdlička, Václav Novotný   +2 more
doaj   +1 more source

Mechanical Vapor Recompression in Distillation: A Framework to Analyze Technical Feasibility, Economic Competitiveness, and Ecological Benefits

Chemie Ingenieur Technik, EarlyView.
Communication: An approach for a holistic evaluation of distillation processes with mechanical vapor recompression combining an initial energy potential analysis, shortcut methods for the compressor and reboiler design, and the determination of economic and ecological performance parameters is presented.
Katharina Jasch, Franziska Lais, Hannes Schneider, Mandy Paschetag, Stephan Scholl   +4 more
wiley   +1 more source

Multi-criteria/comparative analysis and multi-objective optimization of a hybrid solar/geothermal source system integrated with a carnot battery

Case Studies in Thermal Engineering
Among the different electrical energy storage technologies, the Carnot batteries are promising options with low specific cost that do not suffer from geographical limitations and power-capacity coupling.
Badreddine Ayadi, Dheyaa J. Jasim, Ali E. Anqi, Walid Aich, Wajdi Rajhi, Mohammad Marefati   +5 more
doaj   +1 more source

Defossilisation of the Energy Supply of a Chemical Site by Integration of a Carnot Battery

Chemie Ingenieur Technik, EarlyView.
This study presents the results of a techno‐economic analysis of CO2‐free energy supply concepts for electricity and heat for the defossilisation of a chemical park in Germany for the model years 2030 and 2045. The focus is on the integration of a Carnot battery with thermal energy storage, which enables the flexible use of green fuels and renewable ...
Martin Bolten, Stefano Giuliano, Gerrit Koll, Judith Jäger, Arnulf Reitze, Michael Roling, Jana Stengler   +6 more
wiley   +1 more source

Anomeric Amides: Valuable Reagents in Synthetic Organic Chemistry

Angewandte Chemie, Volume 138, Issue 12, 16 March 2026.
Enabling late‐stage transformations and skeletal editing, anomeric amides have recently emerged as powerful synthetic tools. Due to their unique properties, anomeric amides have been employed in reactions ranging from amination to halogenation. This minireview provides an overview of recent progress in using anomeric amides across a variety of ...
Arushi Garg, Jordan Vigier, Hélène Lebel, Tatiana Besset   +3 more
wiley   +2 more sources

Effect of Heat Leak and Finite Thermal Capacity on the Optimal Configuration of a Two-Heat-Reservoir Heat Engine for Another Linear Heat Transfer Law

Entropy, 2003
: Based on a model of a two-heat-reservoir heat engine with a finite high-temperature source and bypass heat leak, the optimal configuration of the cycle is found for the fixed cycle period with another linear heat transfer law .
Chih Wu, Fengrui Sun, Lingen Chen, Tong Zheng   +3 more
doaj   +1 more source

An Innovative Rural Heating System Utilizing Coupled Cascade Thermal Storage: A Performance Analysis

Energy Science &Engineering, EarlyView.
Fig. 1. New rural heating system ABSTRACT This study presents a new rural heating system based on cascaded heat storage and air‐source heat pumps. Through a comparative analysis using the TRNSYS software between this system and the traditional solar‐assisted air‐source heat pump system, it was found that compared with the latter, the new system saves ...
Leilei Jiang, Kaibing Sun, Xilong Shen, Yinan Bo, Xun Liu, Hantao Liu, Ye Zhang, Hui Lei   +7 more
wiley   +1 more source