Results 31 to 40 of about 68,342 (298)

Study of Methods and Development of Technological Scheme for Heat Removal from Rock Waste Dump [PDF]

, 2017
The aim of this paper is to study the methods and develop technological scheme for thermal energy removal from coal mine rock waste dumps. The prospects of renewable energy sources development in Ukraine are analyzed.
Saik, Pavlo
core   +1 more source

Prediction model of thermal conductivity of coal-water slurry based on coal particle-bonded water composite phase

Meitan xuebao
Coal-water slurry gasification is one of advanced coal gasification technologies. The improvement on the efficiency of coal-water slurry gasification is helpful to promote the clean and efficient utilization of coal.
Haifeng JIANG, Huachi ZHANG, Hui ZHAO, Jianliang XU, Qinfeng LIANG, Weifeng LI, Haifeng LIU   +6 more
doaj   +1 more source

Monitoring of coal fracturing in underground coal gasification by acoustic emission techniques [PDF]

, 2017
During the underground coal gasification (UCG) process, fracturing and cracks occur inside the gasification zone and surrounding rocks as the underground coal cavity evolves.Although fracturing activity and crack extension directly affect gasification ...
Faqiang Su, Gota Deguchi, Ken-ichi Itakura, Koutarou Ohga   +3 more
core   +3 more sources

Petrographic Characteristics of Coal Gasification and Combustion by-Products from High Volatile Bituminous Coal

Energies, 2020
The coal was gasified in a fluidized bed reactor with CO2 as a gasifying agent at 889–980 °C. The coal and gasification residue produced during gasification was burned at temperatures up to 900 °C.
Barbara Bielowicz
doaj   +1 more source

Numerical Modelling for Process Investigation of a Single Coal Particle Combustion and Gasification [PDF]

, 2017
Combustion and Gasification are commercial processes of coal utilization, and therefore continuous improvement is needed for these applications. The difference between these processes is the reaction mechanism, in the case of combustion the reaction ...
Karimi, Nader, Paul, Manosh C., Sutardi, Tata, Younger, Paul L.   +3 more
core  

Effect of Injection Flow Rate on Product Gas Quality in Underground Coal Gasification (UCG) Based on Laboratory Scale Experiment: Development of Co-Axial UCG System [PDF]

, 2017
Underground coal gasification (UCG) is a technique to recover coal energy without mining by converting coal into a valuable gas. Model UCG experiments on a laboratory scale were carried out under a low flow rate (6~12 L/min) and a high flow rate (15~30 L/
DEGUCHI Gota, HAMANAKA Akihiro, ITAKURA Ken-ichi, KODAMA Jun-ichi, SU Fa-qiang, TAKAHASHI Kazuhiro   +5 more
core   +2 more sources

Enhancing Interfacial Dioxygen Bridging Dynamics of Waste‐Derived Cathode Catalysts for Augmented High‐Rate Performance in Li‐O2 Batteries

Advanced Science, EarlyView.
This study fabricates Fine Slag/Ti4O7@TiC hybrids with interfacial dioxygen bridge coupling to optimize oxygen redox dynamics in lithium‐oxygen batteries (LOBs). Lattice distortion from oxygen vacancies and inherent charge repulsion of Ti‐O‐C interfacial coupling reconstruct and refine the surface coordination environment.
Jixiong Zhang, Shuxuan Ma, Hengfeng Liu, Binbin Huo, Yunbo Wang, Zhihui Sun, Kai Zeng   +6 more
wiley   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Determination of the Technological Parameters of Borehole Underground Coal Gasification for Thin Coal Seams

Journal of Sustainable Mining, 2013
In this article the characteristics of the criteria of borehole underground coal gasification for thin coal seams are defined. The thermal and material balance calculations for coal seam gasification processes are also explained. The construction, method
Volodymyr S. Falshtynskyi, Roman O. Dychkovskyi, Vasyl G. Lozynskyi, Pavlo B. Saik   +3 more
doaj   +1 more source

The Impact of Organic Constituents in Coal Chemical Wastewater on Additive Adsorption at the Coal Surface: Experimental Investigation and Molecular Dynamics Simulation

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Direct preparation of coal–water slurry using coal chemical wastewater represents an economical and feasible approach for wastewater resource utilization. Unlike clean water, however, the complex organic components in wastewater may exert adverse effects on slurry properties.
Yi Xiang, Zhen Zhao, Fuyan Gao, Zhenghui Zhao, Hang Li, Eric J. Hu, Ruikun Wang   +6 more
wiley   +1 more source