Effect of thermohydraulic conditions on fouling of calcium oxalate and silica

Yu, Hong; Sheikholeslami, R.; Doherty, William O.S.

doi:10.1002/aic.10298

Cited by 22 publications

(16 citation statements)

References 24 publications

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“…Similar to the flow rate, a higher velocity significantly increases the formation of scale on the coupon surface for all sizes of diameter. This finding is contrary to the report by Yu et al [36] who stated that an increase in fluid velocity reduced the rate of scaling due to an increase in removal rate with increasing shear and drag force at the wall of the scaled tube. However, these authors employed a rather high velocity in their experiments (0.75 to 1.75 m s -1 ).…”

Section: Effect Of Velocitycontrasting

confidence: 83%

Effects of Process Parameters on Gypsum Scale Formation in Pipes

2011

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Scaling often leads to a series of technical and economical problems in industrial plants and equipments by blocking water flow in pipes or limiting heat transfer in heat exchangers. While most contemporary studies are focusing on crystallization at heat-exchanger surfaces and scaling on nanofilters in desalination plants, very little work has been done investigating scale formation on pipe and vessel walls. A comprehensive investigation of the effects of various process parameters in controlling the formation of calcium sulfate scale in pipes was undertaken. Supersaturation ratio, run time, and operational hydrodynamics were altered systematically to determine their influence on the scale growth rate. The results confirmed that the deposition of gypsum on pipe walls was significantly affected by these process parameters.

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Section: Effect Of Velocitycontrasting

confidence: 83%

Effects of Process Parameters on Gypsum Scale Formation in Pipes

2011

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“…4b). During repeated generation, growth, and departure of bubble, a liquid film (micro-layer, a few micrometers thick) beneath the bubbles induced horizontal alignment of graphene to form BGLs454647. As the bubbles expanded during the growth, the triple line (where vapor–liquid–solid phases meet) moved, forming BGLs along the micro-layer (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Self-assembled foam-like graphene networks formed through nucleate boiling

Ahn

Jang

Seol

et al. 2013

Sci Rep

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Self-assembled foam-like graphene (SFG) structures were formed using a simple nucleate boiling method, which is governed by the dynamics of bubble generation and departure in the graphene colloid solution. The conductivity and sheet resistance of the calcined (400°C) SFG film were 11.8 S·cm–1 and 91.2 Ω□−1, respectively, and were comparable to those of graphene obtained by chemical vapor deposition (CVD) (~10 S·cm–1). The SFG structures can be directly formed on any substrate, including transparent conductive oxide (TCO) glasses, metals, bare glasses, and flexible polymers. As a potential application, SFG formed on fluorine-doped tin oxide (FTO) exhibited a slightly better overall efficiency (3.6%) than a conventional gold electrode (3.4%) as a cathode of quantum dot sensitized solar cells (QDSSCs).

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“…In addition to the role of interfacial forces in controlling particle deposition rate, the rate of composite fouling and the characteristics of the deposits were also found to be strongly dependent on the surface superheat, fluid velocity, and bulk subcooling 5. First, the composite fouling rate increased with increasing superheat as a result of enhanced bubble–particle interactions at the boiling surface.…”

Section: Introductionmentioning

confidence: 98%

“…The composite fouling of CaOx [as calcium oxalate monohydrate (COM), the most stable hydrate form of CaOx under high temperatures] and SiO 2 in water and sugar solutions has been the subject of a systematic investigation by the authors with the latest work relating the effects of various operating conditions to the mechanisms of composite fouling 4–6. The results indicated that the primary mechanism of composite fouling was particulate deposition of COMSiO 2 colloidal species.…”

Section: Introductionmentioning

confidence: 99%