Novel method for coke optical texture measurement and application on coke derived from different ranks of coking coal

2021 ◽  
Author(s):  
Weizhou Sun ◽  
Mingdong Zheng ◽  
Ping Cui ◽  
Desheng Hu ◽  
Xiu Kan
Keyword(s):  
Texture Measurement ◽  
Coking Coal ◽  
Optical Texture ◽  
Novel Method

scholarly journals Effects and mechanistic aspects of absorbing organic compounds by coking coal

2017 ◽  
Vol 76 (9) ◽  
pp. 2280-2290 ◽  
Author(s):  
Kejia Ning ◽  
Junfeng Wang ◽  
Hongxiang Xu ◽  
Xianfeng Sun ◽  
Gen Huang ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Ph Value ◽  
Freundlich Isotherm ◽  
Systemic Circulation ◽  
Batch Adsorption ◽  
Phenol Removal ◽  
Coal Consumption ◽  
Coking Coal ◽  
Freundlich Isotherms ◽  
Novel Method

Abstract Coal is a porous medium and natural absorbent. It can be used for its original purpose after adsorbing organic compounds, its value does not reduce and the pollutants are recycled, and then through systemic circulation of coking wastewater zero emissions can be achieved. Thus, a novel method of industrial organic wastewater treatment using adsorption on coal is introduced. Coking coal was used as an adsorbent in batch adsorption experiments. The quinoline, indole, pyridine and phenol removal efficiencies of coal adsorption were investigated. In addition, several operating parameters which impact removal efficiency such as coking coal consumption, oscillation contact time, initial concentration and pH value were also investigated. The coking coal exhibited properties well-suited for organics' adsorption. The experimental data were fitted to Langmuir and Freundlich isotherms as well as Temkin and Redlich–Peterson (R-P) models. The Freundlich isotherm model provided reasonable models of the adsorption process. Furthermore, the purification mechanism of organic compounds' adsorption on coking coal was analysed.

Co-carbonization of single coking coal and pyrolytic extracts from datong long-flame coal

2019 ◽  
Vol 116 (1) ◽  
pp. 115 ◽  
Author(s):  
Yaming Zhu ◽  
Shuai Tang ◽  
Xuefei Zhao ◽  
Lijuan Gao
Keyword(s):  
Raw Material ◽  
Low Rank ◽  
Coking Coal ◽  
Coal Blend ◽  
Positive Effects ◽  
Novel Method ◽  
Lean Coal ◽  
Gas Coal ◽  
Anisotropy Degree

Using modified coal as the raw material to produce coke is a novel method to improve the quality of coke during the process of coal blend coking. In this work, the activated components from low-rank coal were used as a common modifier for coal modification process. The properties of co-carbonization coke were studied. The pyrolytic extracts of Chinese Datong long-flame coal (DTLFPE) were used as the additive, while Jinjian gas coal and Zhongwei lean coal were used as the basic coals. The influence of the addition of DTLFPE on coke’s micro-strength, optical texture index (OTI), microstructure and coke reactivity were studied. The results showed that DTLFPE exhibited a significant impact on the performance of Zhongwei lean coal coke. The micro-strength and the OTI index of each coke significantly improved due to the addition of DTLFPE, which meant that their anisotropy degree was enhanced. The addition of DTLFPE also decreased the porosity of Jinjian gas coal coke, and improved the melting ability of the particles in Zhongwei lean coal coke. The DTLFPE was found to be a very suitable modifier for single coking coal, whereas moderate amounts of additives exhibited positive effects on improving the quality of coke.

The removal and morphology of intact biofilms from implanted venous access devices

1995 ◽  
Vol 53 ◽  
pp. 1020-1021
Author(s):  
M.A. Gregory ◽  
G.P. Hadley
Keyword(s):  
Patient Selection ◽  
Surgical Oncology ◽  
Venous Access ◽  
Common Procedure ◽  
Indwelling Catheters ◽  
Careful Patient ◽  
Novel Method ◽  
The Subject ◽  
Vascular Catheters ◽  
Venous Access Devices

The insertion of implanted venous access systems for children undergoing prolonged courses of chemotherapy has become a common procedure in pediatric surgical oncology. While not permanently implanted, the devices are expected to remain functional until cure of the primary disease is assured. Despite careful patient selection and standardised insertion and access techniques, some devices fail. The most commonly encountered problems are colonisation of the device with bacteria and catheter occlusion. Both of these difficulties relate to the development of a biofilm within the port and catheter. The morphology and evolution of biofilms in indwelling vascular catheters is the subject of ongoing investigation. To date, however, such investigations have been confined to the examination of fragments of biofilm scraped or sonicated from sections of catheter. This report describes a novel method for the extraction of intact biofilms from indwelling catheters.15 children with Wilm’s tumour and who had received venous implants were studied. Catheters were removed because of infection (n=6) or electively at the end of chemotherapy.

Microscopic versus process parameters in heavy-oil upgrading

1992 ◽  
Vol 50 (1) ◽  
pp. 366-367
Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam
Keyword(s):  
Molecular Weight ◽  
Liquid Fuels ◽  
Chemical Components ◽  
Heavy Oils ◽  
Synthetic Fuels ◽  
High Hydrogen ◽  
Optical Texture ◽  
Polar Groups ◽  
Anisotropic Character ◽  
Planar Molecules

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.

Longitudinal Changes in Individual BrainAGE in Healthy Aging, Mild Cognitive Impairment, and Alzheimer’s Disease

GeroPsych ◽  
2012 ◽  
Vol 25 (4) ◽  
pp. 235-245 ◽  
Author(s):  
Katja Franke ◽  
Christian Gaser
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Healthy Aging ◽  
Brain Aging ◽  
Elderly Subjects ◽  
Additional Increase ◽  
Longitudinal Changes ◽  
Novel Method ◽  
The Brain

We recently proposed a novel method that aggregates the multidimensional aging pattern across the brain to a single value. This method proved to provide stable and reliable estimates of brain aging – even across different scanners. While investigating longitudinal changes in BrainAGE in about 400 elderly subjects, we discovered that patients with Alzheimer’s disease and subjects who had converted to AD within 3 years showed accelerated brain atrophy by +6 years at baseline. An additional increase in BrainAGE accumulated to a score of about +9 years during follow-up. Accelerated brain aging was related to prospective cognitive decline and disease severity. In conclusion, the BrainAGE framework indicates discrepancies in brain aging and could thus serve as an indicator for cognitive functioning in the future.

Novel method of mitral annular enlargement for implantation of an oversized mitral valve prosthesis

2014 ◽  
Vol 62 (S 02) ◽  
Author(s):  
J. Photiadis ◽  
M. Musci ◽  
O. Miera ◽  
S. Ovroutski ◽  
A. Mekkawy ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Valve Prosthesis ◽  
Mitral Valve Prosthesis ◽  
Novel Method
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