scholarly journals Solid-state mechanochemical technology for deep processing of brown coal: energy efficiency improvement and dust formation control

2021 ◽  
Vol 2057 (1) ◽  
pp. 012035
Author(s):  
AG Matveeva ◽  
TS Skripkina ◽  
UE Bulanova ◽  
VA Bukhtoyarov ◽  
AL Bychkov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Solid State ◽  
Brown Coal ◽  
Technology Implementation ◽  
Formation Control ◽  
Mechanochemical Reaction ◽  
Reaction Yield ◽  
Acid Oxidation ◽  
Dust Formation ◽  
Deep Processing

Abstract Energy efficiency – a compromise between reaction depth and expended energy - is an actual question for any technology implementation. Mechanochemical technology for brown coal deep processing has one more compromise - between reaction depth and dust formation. Indeed, the depth of mechanochemical reactions usually correlates with grinding efficiency, but for coal cases dust formation is an unwanted process. Here we consider a solid-state mechanochemical reaction of humic acid oxidation by sodium percarbonate in one laboratory mill at different conditions. The ratio between the grinding bodies load and the payload was varied, the reaction yield and the ground samples characteristics were controlled.

scholarly journals Industrial Energetic Districts: Impact Analysis on the Global Energy Efficiency and Business Competitiveness

2018 ◽  
Vol 64 ◽  
pp. 08007
Author(s):  
Corredor Lesme ◽  
Avendaño José ◽  
Bello Robert ◽  
Redondo Álvaro ◽  
Calle José ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Emerging Economies ◽  
Technology Implementation ◽  
Impact Analysis ◽  
Control Volume ◽  
Developed Countries ◽  
Simulation Software ◽  
Industrial Plant ◽  
Industrial District ◽  
Global Energy

Process industries located in emerging economies have relative low levels of production to similar ones located in developed countries, this fact influences the implementation feasibility of cogeneration and/or tri-generation systems that allow a substantial increase in the plant global energy efficiency. In this paper, an energy and economic analysis of several alternatives of cogeneration was done for a company located in Barranquilla (Colombia, South America) that produces vegetable oils and derivatives and its energy matrix is approximately 90% thermal and 10% electric. In this investigation two type of analysis were done, both supported by process simulation software, these are: 1) Taking the plant as the control volume and evaluating the entire electrical demand supply with natural gas engine and turbine – generator, plus exhaust gases heat recovery for refrigeration and/or preheating of thermal oil or water in boilers. 2) As an energy-industrial district, where the company takes advantage of the residual heat of a gas turbine and sells the excess of electrical power to nearby plants, a concept introduced by the authors as Sustainable Energetic Industrial District in Emerging Economies (SEIDEE). The input variable considered for this analysis was electric demand which restricts the technology implementation. It was found that the investment return period is notably lengthy when the thermal machine supplies the electric power demanded by the industrial plant. This period is considerably reduced when the SEIDEE concept is implemented, this period reduction is between 57% and 65%.

Analysis of water in Loy Yang brown coal using solid-state 1H NMR

2013 ◽  
Vol 19 (5) ◽  
pp. 1673-1679 ◽  
Author(s):  
Hyun-Seok Kim ◽  
Yusuke Nishiyama ◽  
Keiko Ideta ◽  
Jin Miyawaki ◽  
Yohsuke Matsushita ◽  
...  
Keyword(s):  
Solid State ◽  
1H Nmr ◽  
Brown Coal

The Solid-State Mechanochemical Reaction of Fullerene C60

1999 ◽  
Vol 7 (4) ◽  
pp. 609-620 ◽  
Author(s):  
Koichi Komatsu ◽  
Yasujiro Murata ◽  
Guan-Wu Wang ◽  
Toru Tanaka ◽  
Noriyuki Kato ◽  
...  
Keyword(s):  
Solid State ◽  
Fullerene C60 ◽  
Mechanochemical Reaction

scholarly journals Complete mineralization of acetic acid using catalytic ozonation with a high energy efficiency enhanced by MnO2/γ-Al2O3

2021 ◽  
Author(s):  
Ruiyun Meng ◽  
Shuiliang Yao ◽  
Erhao Gao ◽  
Zuliang Wu ◽  
Jing Li ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Acetic Acid ◽  
Ph Value ◽  
Acetic Acid Solution ◽  
High Energy ◽  
Catalytic Ozonation ◽  
Acid Oxidation ◽  
Initial Ph ◽  
Catalyst Powder ◽  
Complete Mineralization

Abstract The complete mineralization of acetic acid in a biodegradation process is difficult due to the α-position methyl on the carboxyl group of acetic acid. This study explores the complete oxidation of acetic acid by catalytic ozonation. Metal oxides of MnO2, Co3O4, Fe3O4, and CeO2 loaded on γ-Al2O3 power were used as the catalysts. The experimental results showed that MnO2/γ-Al2O3 catalyst had the best mineralization performance for acetic acid. Typically, the mineralization of acetic acid is as high as 88.4% after 300 min ozonation of 100 mL of 1.0 g L‒1 acetic acid catalysed by 3.0 g 1.0wt.% MnO2/γ-Al2O3 catalyst powder with an energy efficiency of 15 g kWh‒1. However, without a catalyst, the mineralization of acetic acid is only 33.2% with an energy efficiency of 5.1 g kWh−1. The effects of MnO2 loading, catalyst dosage, acetic acid concentration, O3 concentration, ozonation temperature, and initial pH value of the acetic acid solution were systematically investigated. Radical quenchers and in-situ DRIFTS analyses indicated that •OH radical and reactive oxygen species on catalyst surface played an important role in the ozonation of acetic acid to CO2 and H2O. The mechanism of acetic acid oxidation on MnO2/γ-Al2O3 is proposed.

Hot Spot Cooling Using Recycled Energy

2007 ◽  
Author(s):  
Chien Ouyang ◽  
Kenny Gross ◽  
Ali Heydari
Keyword(s):  
Energy Efficiency ◽  
Solid State ◽  
Waste Heat ◽  
Hot Spot ◽  
Thermal Gradients ◽  
Novel Approach ◽  
State Technique ◽  
Spot Cooling ◽  
Wasted Energy

The paper describes a novel approach for achieving enhanced energy efficiency for computer servers. The paper teaches a novel solid-state technique and apparatus for recycling waste heat from chip packages and turning that wasted energy into hot-spot cooling for other IC packages in the same server. This approach brings the combined advantages of enhanced energy efficiency while smoothing out the spatial and temporal thermal gradients, thereby yielding better long term reliability for multiple-chip enterprise servers.

Planar all-solid-state rechargeable Zn–air batteries for compact wearable energy storage

2019 ◽  
Vol 7 (29) ◽  
pp. 17581-17593 ◽  
Author(s):  
Zhiqian Cao ◽  
Haibo Hu ◽  
Mingzai Wu ◽  
Kun Tang ◽  
Tongtong Jiang
Keyword(s):  
Energy Efficiency ◽  
Energy Storage ◽  
Solid State ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Next Generation ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Novel Design

Planar all-solid-state rechargeable Zn–air batteries with superior energy efficiency demonstrate a novel design for compact all-solid-state rechargeable ZABs towards next-generation wearable energy storage devices with high energy density and safety.

scholarly journals Graphene-based quasi-solid-state lithium–oxygen batteries with high energy efficiency and a long cycling lifetime

2018 ◽  
Vol 10 (11) ◽  
pp. 1037-1045 ◽  
Author(s):  
Gang Huang ◽  
Jiuhui Han ◽  
Chuchu Yang ◽  
Ziqian Wang ◽  
Takeshi Fujita ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Solid State ◽  
High Energy ◽  
High Energy Efficiency ◽  
Lithium Oxygen Batteries
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