Measurement of the deposit formation during pneumatic transport of PMMA powder

2020 ◽  
Vol 31 (8) ◽  
pp. 3597-3609 ◽  
Author(s):  
Nuki Susanti ◽  
Holger Grosshans
Keyword(s):  
Pneumatic Transport ◽  
Deposit Formation ◽  
Pmma Powder

Numerical simulation of atomic layer deposition for thin deposit formation in mesoporous substrate

AIChE Journal ◽  
2021 ◽  
Author(s):  
Liwei Zhuang ◽  
Peter Corkery ◽  
Dennis T. Lee ◽  
Seungjoon Lee ◽  
Mahdi Kooshkbaghi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Deposit Formation ◽  
Layer Deposition

scholarly journals Complement C5 is not critical for the formation of sub-RPE deposits in Efemp1 mutant mice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Donita L. Garland ◽  
Eric A. Pierce ◽  
Rosario Fernandez-Godino
Keyword(s):  
Macular Degeneration ◽  
Retinal Pigment ◽  
Age Related Macular Degeneration ◽  
Deposit Formation ◽  
Genetic Ablation ◽  
Age Related ◽  
Complement Dysregulation

AbstractThe complement system plays a role in the formation of sub-retinal pigment epithelial (RPE) deposits in early stages of age-related macular degeneration (AMD). But the specific mechanisms that connect complement activation and deposit formation in AMD patients are unknown, which limits the development of efficient therapies to reduce or stop disease progression. We have previously demonstrated that C3 blockage prevents the formation of sub-RPE deposits in a mouse model of EFEMP1-associated macular degeneration. In this study, we have used double mutant Efemp1R345W/R345W:C5-/- mice to investigate the role of C5 in the formation of sub-RPE deposits in vivo and in vitro. The data revealed that the genetic ablation of C5 does not eliminate the formation of sub-RPE deposits. Contrarily, the absence of C5 in RPE cultures promotes complement dysregulation that results in increased activation of C3, which likely contributes to deposit formation even in the absence of EFEMP1-R345W mutant protein. The results also suggest that genetic ablation of C5 alters the extracellular matrix turnover through an effect on matrix metalloproteinases in RPE cell cultures. These results confirm that C3 rather than C5 could be an effective therapeutic target to treat early AMD.

scholarly journals Effects of thermal treatments on characteristics and morphological variations in the deposits of urea-SCR systems

2021 ◽  
Author(s):  
Sadashiva Prabhu S ◽  
Kapilan Natesan ◽  
Nagaraj Shivappa Nayak
Keyword(s):  
Cyanuric Acid ◽  
Catalytic Reduction ◽  
Morphological Changes ◽  
Water Solution ◽  
Slight Variation ◽  
Gravimetric Analysis ◽  
Oxides Of Nitrogen ◽  
Deposit Formation ◽  
X Ray ◽  
Exhaust Gases

AbstractSelective catalytic reduction (SCR) systems are employed by automobile manufacturers for the abatement of environmental pollutants like oxides of nitrogen (NOx) emitted from exhaust gases of diesel engines. In SCR, the urea-water solution (UWS) is injected to exhaust gases in the form of a spray to generate the reducing agent NH3. Deposit formation at lower temperatures is a major concern with this technology. The deposits not only create backpressure but also leak NH3 to the environment as they deplete. It is very important to know the depletion characteristics of deposits formed at lower temperatures in order to assess the NH3 leakage to the environment when the engine exhaust gases attain higher temperatures. In the present work, deposits formed at a low-temperature range of 150–200°C for continuous run along with UWS injection were investigated. Additionally, they were aged at 300°C in the absence of UWS to check the variation in characteristics with the rise of temperature. By gravimetric analysis, it is inferred that the deposits formed at higher pre-age temperatures are less prone to depletion as the temperature increases. The elemental analysis using energy-dispersive X-ray spectroscopy (EDX) indicates slight variation in carbon, nitrogen and oxygen compositions for all the pre-age conditions. As an extended study, the byproducts at pre-age and post-age conditions were investigated through X-ray diffraction (XRD). The compounds like cyanuric acid (CYA) and biuret were not observed when pre-age samples were aged at 300°C. Instead, the compounds like ammelide, ammeline, triuret and melamine were observed. Scanning electron microscope (SEM) study revealed morphological changes in both pre-age and post-age samples. Further, the crystallinity variations were also observed for the changes in the heating cycles during deposit formation. The gravimetric analysis of deposits in pre-age and post-age conditions helps in predicting the amount of deposits for transient load cycles.

Numerical simulation of dense-phase pneumatic transport of powder in horizontal pipes

2020 ◽  
Vol 361 ◽  
pp. 62-73 ◽  
Author(s):  
Zhen Miao ◽  
Shibo Kuang ◽  
Habib Zughbi ◽  
Aibing Yu
Keyword(s):  
Numerical Simulation ◽  
Pneumatic Transport ◽  
Dense Phase ◽  
Horizontal Pipes

Influence of sintering on deposit formation during pool boiling of calcium sulphate solutions

2010 ◽  
Vol 34 (8) ◽  
pp. 1439-1447 ◽  
Author(s):  
M. Esawy ◽  
M.S. Abd-Elhady ◽  
M.R. Malayeri ◽  
H. Müller-Steinhagen
Keyword(s):  
Pool Boiling ◽  
Calcium Sulphate ◽  
Deposit Formation

Investigation of deposit formation and its characterization for a pulverized bituminous coal power plant

2016 ◽  
Vol 141 ◽  
pp. 225-234 ◽  
Author(s):  
Selahattin Babat ◽  
Reinhold Spörl ◽  
Jörg Maier ◽  
Günter Scheffknecht
Keyword(s):  
Power Plant ◽  
Bituminous Coal ◽  
Deposit Formation ◽  
Coal Power Plant ◽  
Coal Power

Modelling of Deposit Formation on a Rotating Tubular Membrane

1992 ◽  
Vol 61-62 ◽  
pp. 421-424
Author(s):  
M.G. Liu ◽  
R. Ben Aim ◽  
M. Mietton Peuchot
Keyword(s):  
Deposit Formation ◽  
Tubular Membrane
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