scholarly journals Understanding the role of kerosene on the coal particle and bubble attachment process

Fuel ◽  
2022 ◽  
Vol 307 ◽  
pp. 121915
Author(s):  
Yumeng Chen ◽  
Baonan Zhou ◽  
Xurui Zhang ◽  
Siyuan Yang ◽  
Wei Huang
Keyword(s):  
Coal Particle ◽  
Bubble Attachment ◽  
Attachment Process

The role of hydrogen in coal particle disintegration at elevated temperatures

1990 ◽  
Vol 68 (2) ◽  
pp. 340-345 ◽  
Author(s):  
Robert A. Pozzobon ◽  
J. M. Shaw ◽  
Sun Yushun
Keyword(s):  
Coal Particle ◽  
Elevated Temperatures

Application of Light Microscopy to Direct Coal Liquefaction Research

1998 ◽  
Vol 4 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Gino A. Irdi ◽  
Robert P. Warzinski ◽  
Harold B. Booher
Keyword(s):  
Light Microscopy ◽  
Coal Particle ◽  
Bituminous Coal ◽  
Reaction Times ◽  
Experimental Conditions ◽  
Initial Stage ◽  
Quantitative Changes ◽  
Direct Coal Liquefaction ◽  
Lower Reflectance

Light microscopy was used to analyze the effects of added catalyst at different conditions (temperature and reaction times) in liquefaction testing of a low pyritic sulfur bituminous coal. Quantitative changes in vitrinite/vitroplast reflectance of coal and liquefaction residues were shown to be useful markers in analyzing and understanding the role of catalyst during the initial stage of coal particle hydrogenation. Lower reflectance values corresponded to increased conversions up to about the 60 min and 375°C experimental conditions. Microscopical observation of liquefaction residues also revealed the presence of “wall scales” of varying width.

Role of dodecane on coal particle-bubble interaction in aqueous phase

2020 ◽  
Vol 319 ◽  
pp. 114175
Author(s):  
Zhiqiang Zhang ◽  
Congshan Wu ◽  
Kefeng Yan
Keyword(s):  
Aqueous Phase ◽  
Coal Particle ◽  
Bubble Interaction

scholarly journals A Rational Interpretation of the Role of Turbulence in Particle-Bubble Interactions

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1006
Author(s):  
Ning Yao ◽  
Jingting Liu ◽  
Xun Sun ◽  
Yan Liu ◽  
Songying Chen ◽  
...  
Keyword(s):  
Surface Science ◽  
Future Development ◽  
Coal Particle ◽  
Froth Flotation ◽  
Chemical Processes ◽  
Operating Parameters ◽  
Bubble Interactions ◽  
Turbulence Effects ◽  
Flotation Performance

Interactions between particles and bubbles have been cornerstone for the successful applications of froth flotation to the beneficiations of minerals or coal. Particle-bubble interactions are highly physio-chemical processes on the basis of surface science and hydrodynamics. Though these two aspects are deeply interwoven, we focus on the discussions of the effects of turbulence on the interactions between particles and bubbles, i.e., collision, attachment and detachment. It has to be mentioned this effect is not working in one direction and can affect flotation performance in a complicated way. Only when turbulence effects are well understood, flotation processes can be optimised by suitably changing equipment structure or operating parameters. The aim of this paper is to review the most recent progresses in this aspect and to identify the future development in successfully considering turbulence effects on flotation processes.

Modelling the global efficiency of dissolved air flotation

2001 ◽  
Vol 43 (8) ◽  
pp. 159-166 ◽  
Author(s):  
D. M. Leppinen ◽  
S. B. Dalziel ◽  
P. F. Linden
Keyword(s):  
Particle Size ◽  
Bubble Size ◽  
High Surface ◽  
Surface Loading ◽  
Dissolved Air Flotation ◽  
Loading Rates ◽  
Air Flotation ◽  
Bubble Attachment ◽  
Attachment Process ◽  
Dissolved Air

The purpose of this paper is to examine how the efficiency of dissolved air flotation is affected by the size of bubbles and particles. The rise speed of bubble/particle agglomerates is modelled as a function of bubble and particle size, while the kinematics of the bubble attachment process is modelled using the population balance approach adopted by Matsui, Fukushi and Tambo. It is found that flotation, in general, is enhanced by the use of larger particles and larger bubbles. In particular, it is concluded that for the ultra-high surface loading rates of 25 m/hr or more planned for future flotation tanks, bubble size will have to be increased by a factor of two over the size currently employed in many facilities during dissolved air flotation.

Treating Opioid Use Disorder in Peripartum Mothers: A Look at the Psychodynamics, Neurobiology, and Potential Role of Oxytocin

2021 ◽  
Vol 49 (1) ◽  
pp. 48-72
Author(s):  
Danielle K. Patterson ◽  
David Pollock ◽  
C. Sue Carter ◽  
Joanna E. Chambers
Keyword(s):  
Opioid Use Disorder ◽  
Opioid Use ◽  
Infant Attachment ◽  
Working Models ◽  
Internal Working ◽  
Pregnancy And Postpartum ◽  
Opioid Use Disorders ◽  
Peripartum Period ◽  
Attachment Process

The peripartum period (pregnancy and postpartum) is a unique time filled with psychodynamic and biological changes that are critical in affecting the lives of mother and baby. Attachment, the biologically based emotional connection between a caregiver and infant, is critical to the development of the child. The early interactions in an infant's life shape their reward neuro-circuitry and the development of their internal working models and styles of attachment. Opioid use disorders in the mother affect the psychodynamics and neurobiology of attachment. There is significant overlap between the neurobiology of attachment and that of opioid use disorders. In this article, we hope to describe how opioid use disorders affect mother-infant attachment and how psychodynamic psychotherapy that is informed by attachment theory may be a potential treatment for mothers with opioid use disorders. Further, oxytocin plays a role in the attachment process and may function abnormally in mothers with opioid use disorders. As oxytocin affects attachment, administration of oxytocin during postpartum mother-infant interactions in the setting of psychotherapy may facilitate bonding and promote recovery from opioid use disorders in the peripartum population.

Does the Early Application of Silver Nitrate Impair Maternal Attachment?

PEDIATRICS ◽  
1981 ◽  
Vol 67 (5) ◽  
pp. 737-738
Author(s):  
Perry M. Butterfield ◽  
Robert N. Emde ◽  
Marilyn J. Svejda
Keyword(s):  
American Academy ◽  
Silver Nitrate ◽  
Eye Contact ◽  
Maternal Attachment ◽  
Delivery Room ◽  
Visual Response ◽  
Early Application ◽  
American Academy Of Pediatrics ◽  
Attachment Process

In a statement from the American Academy of Pediatrics (AAP) on "Prophylaxis and Treatment of Neonatal Gonococcal Infections" (Pediatrics 65: 1047, 1980), it was suggested that eye prophylaxis might be delayed up to one hour after birth in order to facilitate maternal attachment. Cited in the AAP statement was our 1977 study that demonstrated that silver nitrate administration in the delivery room decreases eye openness in the newborn and inhibits visual response within the first hour after birth.1 The eyes have been cited as central to the baby's ability to solicit affection.2-4 However, there has been little systematic information available to define the role of eye-to-eye contact in the attachment process.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor
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