Results 41 to 50 of about 1,887,958 (350)

Hydrocracking Lumped Kinetic Model with Catalyst Deactivation in Arak Refinery Hydrocracker Unit [PDF]

Journal of Petroleum Science and Technology, 2011
A kinetic model of a fixed bed tubular reactor incorporating catalyst deactivation was developed for the ISOMAX unit of Arak refinery. The kinetic parameters for the hydrocracking reactions over the commercial catalyst were determined using initial ...
A. Moghadassi, N. Amini, O. Fadavi, M. Bahmani   +3 more
doaj   +1 more source

Enhanced CO2 Methanation by New Microstructured Reactor Concept and Design [PDF]

, 2019
A novel multichannel minireactor with channel internal diameter in the range of millimeters has been conceptually designed and constructed. Its configuration confers to the new concept reactor some features and advantages compared to conventional fixed ...
Aragón, Jorge J., Garcia-Suarez, Eduardo J., Peciña, Iñigo, Pérez, Susana   +3 more
core   +2 more sources

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

Ignition means for monopropellant Patent [PDF]

, 1967
Catalyst bed ignition system for hydrazine ...
Evans, D. D., Lee, D. H.
core   +1 more source

Gas phase polymerization of ethylene with a silica-supported metallocene catalyst: influence of temperature on deactivation [PDF]

, 1997
Ethylene was polymerized at 5 bar in a stirred powder bed reactor with silica supported rac-Me2Si[Ind]2ZrCl2/methylaluminoxane (MAO) at temperatures between 40°C and 80°C using NaCl as support bed and triethylaluminium (TEA) as a scavenger for impurities.
Meier, G.B., Roos, P., Samson, J.J.C., Samson, Job Jan C., Weickert, G., Westerterp, K.R.   +5 more
core   +2 more sources

Enhancement of Fixed-bed Flow Reactions under Microwave Irradiation by Local Heating at the Vicinal Contact Points of Catalyst Particles

Scientific Reports, 2019
The formation of local high temperature regions, or so-called “hot spots”, in heterogeneous reaction systems has been suggested as a critical factor in the enhancement of chemical reactions using microwave heating. In this paper, we report the generation
Naoto Haneishi, S. Tsubaki, Eriko Abe, M. Maitani, E. Suzuki, S. Fujii, J. Fukushima, H. Takizawa, Y. Wada   +8 more
semanticscholar   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

Evaluation and Performance Optimization of a Hydrogen Peroxide-Based Green Monopropellant Thruster for Steady-State Operations

Aerospace
Hydrogen peroxide (High Test Peroxide, HTP) emerges as a promising candidate for green space propulsion applications due to its lower toxicity compared to liquid conventional propellants such as hydrazine and nitrogen tetroxide.
Uğur Kokal, Mustafa Baysal, Nur Ber Emerce, Yiğit Yıldız, Arif Karabeyoğlu, İbrahim Özkol   +5 more
doaj   +1 more source

Comparison of the Effects of Fluidized-Bed and Fixed-Bed Reactors in Microwave-Assisted Catalytic Decomposition of TCE by Hydrogen

Advances in Materials Science and Engineering, 2012
Trichloroethylene (TCE) decomposition by hydrogen with microwave heating under different reaction systems was investigated. The activities of a series of catalysts for microwave-assisted TCE hydrodechlorination were tested through the fixed-bed and the ...
Lili Ren, Jin Zhang
doaj   +1 more source

An original growth mode of MWCNTs on alumina supported iron catalysts [PDF]

, 2009
Multi-walled carbon nanotubes (MWCNTs) have been produced from ethylene by Fluidized Bed Catalytic Chemical Vapor Deposition (FB-CCVD) on alumina supported iron catalyst powders.
Bernard, Daniel, Bordère, Serge, Caussat, Brigitte, Falqui, A., Gaillard, Patrice, Kalck, Philippe, Kihn, Yolande, Philippe, Régis, Plee, Dominique, Serp, Philippe   +9 more
core   +2 more sources