Results 151 to 160 of about 10,229,722 (198)

Kinetics of thermochemical pretreatment of lignocellulosic materials

Applied Biochemistry and Biotechnology, 1989
The results of an experimental study of the acid hydrolysis of hardwood are presented in the form of values for the three parameters, activation energy, power on the acid concentration, and pre-exponen-tial factor, of the first order kinetic constants for each of the following reaction participants: xylan remaining, glucan remaining, xylose formed, and
A. O. Converse, I. K. Kwarteng, H. E. Grethlein, H. Ooshima   +3 more
openaire   +1 more source

Thermochemical resistive switching: materials, mechanisms, and scaling projections

Phase Transitions, 2011
In this article, resistive switching based on the thermochemical mechanism (TCM) is reviewed. This mechanism is observed when thermochemical redox processes dominate over electrochemical processes. As the switching is based on thermal effects, it is inherently unipolar, i.e., the transitions between the resistive states can be induced by the same bias ...
IELMINI, DANIELE, R. Bruchhaus, R. Waser
openaire   +1 more source

Thermochemical material removal of diamond by solid iron and mischmetal

Production Engineering, 2009
Solid iron and mischmetal (Ce, La, Fe, etc. alloy) were used to remove material from single crystal diamond. Contact experiments with diamond and mischmetal were carried out at 600°C and 750°C with hold times from 3 to 24 h. Contact experiments with diamond and iron were performed at 850°C with hold times of 3, 4 and 5 h.
Ekkard Brinksmeier, M. J. Klopfstein
openaire   +1 more source

Solar thermochemical conversion of carbonaceous materials into syngas by Co-Gasification

Journal of Cleaner Production, 2020
Transitioning from fossil fuel based energy sources to more viable and alternative renewable energy sources requires intermediary methods that bridge the gap between existing technology and newer innovative renewable technologies.
Mohamed Reda Ramadan Gomaa, Ramadan J. Mustafa, Nesrien Al-Dmour   +2 more
semanticscholar   +1 more source

Thermochemical Treatment of Porous Materials

1982
The study of chromizing and aluminizing by pack cementation of nickel base alloy felts has resulted in some original observations due to the high porosity of the material. In particular, the exchange mechanisms between the powder and the felt, the localized depletion of the powder and the modification of its activity have been studied.
openaire   +1 more source

Structure and hydration state characterizations of MgSO4-zeolite 13x composite materials for long-term thermochemical heat storage

Solar Energy Materials and Solar Cells, 2019
Salt hydrate based composite materials are promising to be used for long-term thermochemical heat storage. MgSO4-Zeolite 13x composite materials were prepared in the present work using the solution impregnation method to reveal detailed characteristics ...
Quanbiao Wang, Yunyun Xie, B. Ding, Guoliang Yu, Feng Ye, Chao Xu   +5 more
semanticscholar   +1 more source

Materials design of perovskite solid solutions for thermochemical applications

Energy & Environmental Science, 2019
Perovskite solid solutions are screened both experimentally and through DFT to determine their redox properties for thermochemical applications.
J. Vieten, B. Bulfin, P. Huck, Matthew K. Horton, D. Gubán, Liya Zhu, Youjun Lu, K. Persson, M. Roeb, C. Sattler   +9 more
semanticscholar   +1 more source

Thermochemical energy storage performances of Ca-based natural and waste materials under high pressure during CaO/CaCO3 cycles

Energy Conversion and Management, 2019
Thermochemical energy storage based on CaO/CaCO3 cycles is a promising technique used in concentrated solar power plant. The high global efficiency can be achieved under high carbonation pressure and temperature.
H. Sun, Yingjie Li, Zhiguo Bian, Xianyao Yan, Zeyan Wang, Wenqiang Liu   +5 more
semanticscholar   +1 more source

Appearance of thermochemical emf in some conducting materials

Combustion, Explosion and Shock Waves, 1982
The appearance of an emf in conductors when they are heated is described by the Seebeck and Thompson effects. If some part of the surface of a conductor is covered by a pyrotechnical material and ignited, then while the pyrotechnical material is burning and after it has burned, an emf arises at the ends of the conductor.
Yu. S. Petrov, V. D. Shcheglov, V. V. Maslikhov   +2 more
openaire   +1 more source

High-Temperature thermochemical interactions of molten silicates with Yb2Si2O7 and Y2Si2O7 environmental barrier coating materials

, 2019
The thermochemical behavior of EBC candidate materials yttrium disilicate (Y2Si2O7) and ytterbium disilicate (Yb2Si2O7) was evaluated with three calcium-magnesium-aluminosilicate (CMAS) glasses possessing CaO:SiO2 ratios relevant to gas turbine systems ...
J. Stokes, B. Harder, Valerie L. Wiesner, D. Wolfe   +3 more
semanticscholar   +1 more source