Results 21 to 30 of about 25,282 (251)

Unveiling the Origin of the Selectivity and the Molecular Mechanism in the [3+2] Cycloaddition Reaction of N-aryl-C-carbamoylnitrone with N-arylitaconimide

Organics, 2022
The [3+2] cycloaddition reaction of N-aryl-C-carbamoylnitrone (nitrone 1) with N-arylitaconimide (ethylene 2) was computationally studied using the B3LYP/6-31G(d) level of theory. An analysis of the different energetic profiles and the transition states’
Abdelmalek Khorief Nacereddine, Fouad Chafaa   +1 more
doaj   +1 more source

Impact of Newtonian heating and Fourier and Fick’s laws on a magnetohydrodynamic dusty Casson nanofluid flow with variable heat source/sink over a stretching cylinder

Scientific Reports, 2021
The present investigation aims to deliberate the magnetohydrodynamic (MHD) dusty Casson nanofluid with variable heat source/sink and modified Fourier’s and Fick’s laws over a stretching cylinder.
Muhammad Ramzan, Naila Shaheen, Jae Dong Chung, Seifedine Kadry, Yu-Ming Chu, Fares Howari   +5 more
doaj   +1 more source

Effect of gas on microstructure and thermal reactivity of coal during low temperature oxidation

Meitan kexue jishu, 2023
In order to investigate the microscopic physicochemical properties and macroscopic coal-oxygen complex thermal effects in the low-temperature oxidation of coal under gas atmosphere, different metamorphic coal and secondary oxidized coal samples as ...
DENG Jun, ZHOU Jiamin, BAI Zujin, LIU Le, WANG Caiping   +4 more
doaj   +1 more source

The formation of ice mantles on interstellar grains revisited – the effect of exothermicity

Faraday Discuss., 2014
Modelling of grain surface chemistry generally deals with the simulation of rare events. Usually deterministic methods or statistical approaches such as the kinetic Monte Carlo technique are applied for these simulations. All assume that the surface processes are memoryless, the Markov chain assumption, and usually also that their ...
T. Lamberts, X. de Vries, and H. M. Cuppen   +2 more
openaire   +3 more sources

Exothermic dark matter for XENON1T excess

Journal of High Energy Physics, 2021
Motivated by the recent excess in the electron recoil from XENON1T experiment, we consider the possibility of exothermic dark matter, which is composed of two states with mass splitting.
Hyun Min Lee
doaj   +1 more source

Significance of variable electrical conductivity on non-Newtonian fluid flow between two vertical plates in the coexistence of Arrhenius energy and exothermic chemical reaction

Partial Differential Equations in Applied Mathematics, 2021
The present study is designed to model the combustible materials of two vertical plates with Arrhenius energy and exothermic chemical reaction. The magnetohydrodynamics fluid is considered to experience an exothermic chemical reaction inside the channel.
Adebowale Martins Obalalu, Olusegun Adebayo Ajala, Adeshina Taofeeq Adeosun, Akintayo Oladimeji Akindele, Olayinka Akeem Oladapo, Olatunbosun Akintayo Olajide, Adegbite Peter   +6 more
doaj   +1 more source

METHANOL STEAM REFORMING FOR HYDROGEN PRODUCTION IN MICROCHANNEL REACTORS

Chemical Engineering Journal Storage, 2022
Many attempts have been made to improve heat transfer for thermally integrated microchannel reforming reactors. However, the mechanisms for the effects of design factors on heat transfer characteristics are still not fully understood.
Junjie Chen
doaj   +1 more source

Effects of Changing Size-Weight Parameters on the Temperature Dependent Exothermic Riser Sleeve Properties

Eurasian Chemico-Technological Journal, 2018
Exothermic riser (feeder) sleeves are used to retain the heat in risers and to increase solidification duration. A riser should be enough hot to become the last solidified part in a mould cavity.
O. Yucel, A. Turan, K. C. Candeger
doaj   +1 more source

Evolution characteristics of key groups of coal oxidation exotherm and their thermal effects under oxygen-depleted condition

Meitan xuebao
In order to investigate the evolution characteristics of the key groups and their thermal effects under the effect of oxygen-depleted, the thermal reaction process of coal under different oxygen concentrations and the change law of its microscopic groups
Yuanbo ZHANG, Yutao ZHANG, Jun DENG, Yaqing LI, Xueqiang SHI, Xiaofang REN   +5 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source