Results 141 to 150 of about 1,795,114 (414)

Fossil Fuels: Coal [PDF]

open access: yes
This lesson provides an introduction to the use of coal as an energy source. Topics include the history of coal usage, applications of coal as an energy source, and major suppliers of coal (the United States).
John Pratte
core  

Material handling systems for the fluidized-bed combustion boiler at Rivesville, West Virginia [PDF]

open access: yes, 1977
The 300,000 lbs/hr steam capacity multicell fluidized-bed boiler (MFB) utilizes complex material handling systems. The material handling systems can be divided into the following areas: (1) coal preparation; transfer and delivery, (2) limestone handling ...
Branam, J. G., Rosborough, W. W.
core   +1 more source

Modulating the Evolution of Metastable CaO* for the Near‐Theoretical Performance Breakthrough of Ni/CeO2‐CaO in Integrated CO2 Capture and Methanation

open access: yesAdvanced Science, EarlyView.
A low‐temperature hydrogen spillover decomposition strategy is proposed to reveal the influence of the CaCO3 parent conversion process on the properties of nascent CaO. Under the guidance of the advanced synthesis strategy, the properties of calcium‐based dual‐functional materials are maximally exploited.
Lifei Wei   +7 more
wiley   +1 more source

STUDYING THE POSSIBILITY OF USING RED-BROWN CLAY FOR RECLAMATION OF COAL WASTE DUMPS [PDF]

open access: yes, 2018
The coal mining industry, as the source of the main fuel resource and the main energy resource, has particular importance for Ukraine.
Heilmeier, Hermann   +1 more
core  

Hybrid Solar Spectral‐Splitting Photovoltaic‐Thermal Hydrogen Production Systems

open access: yesAdvanced Science, EarlyView.
A hybrid solar photovoltaic‐thermal hydrogen system with membrane‐less electrolysis significantly boosts solar‐to‐hydrogen efficiency by co‐using thermal and electrical energy. The system attains good performance under variable irradiance with direct current power converters.
Yu Tian   +4 more
wiley   +1 more source

Role of molecular architecture and temperature on extrusion melt flow instabilities of two industrial LLDPE and LDPE polyethylenes investigated by capillary rheology, high‐pressure sensitivity slit die and optical analysis

open access: yesJournal of Applied Polymer Science, Volume 140, Issue 2, January 10, 2023., 2023
Abstract The characteristic time periodicity τ* and the spatial characteristic wavelength λ of extrusion flow instabilities of a linear and a branched commercial polyethylene (PE) are characterized via capillary rheology, optical analysis and modeled. The two investigated polyethylenes have the similar weight average molecular weight (Mw).
Christos K. Georgantopoulos   +4 more
wiley   +1 more source

Reduction of Sulfur and Ash from Tabas Coal by Froth Flotation [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2007
Tabas mines in Iran have coal sources which are suitable for use in metallurgy industries as coking coal. But the high sulfur content of this coal imposes severe limitations on its utilization as the sulfur oxide gases evolved from the combustion of high
Mohammad Reza Ehsani, Farahnaz Eghbali
doaj  

Sustainable Development of High‐performance Poly(ester‐imine) Biobased Thermosets

open access: yesAdvanced Science, EarlyView.
Schiff‐based epoxy monomers derived from renewable natural resources are used to design robust structures by cross–linking with bio‐anhydrides. The resulting eco‐friendly, high‐performance thermosets feature two cleavable bonds, offering versatility for various applications.
Roxana Dinu   +3 more
wiley   +1 more source

Silane and silazane surface modification of recycled glass fibers for polypropylene composites

open access: yesJournal of Applied Polymer Science, Volume 140, Issue 5, February 5, 2023., 2023
This study investigates the efficiency of multifunctional silane and silazane agents for surface modification of recycled glass fibers. Overall, the amino‐silane reagents improve the dispersion of GFs in PP, and permit subsequent reaction with MAPP leading to better compatibilization, with moderate improvements in strength attributed to the ...
Kyriaki Gkaliou, Anders E. Daugaard
wiley   +1 more source

Investigation and Measurement of Ash Content of Coal in Zirab Coal Mine-Iran Using Dual Energy -Ray and X-Ray Fluorescence Methods [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2000
Coal with low ash content has an important role in the coal and steel industry. There are different methods to measure the ash content. The conventional method which is used in most coal mines of Iran, is to burn the coal and measure the remaining ash. A
Abbas Esmaeilnia Shirvani   +1 more
doaj  

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