Rotating Disk Apparatus for Reaction Rate Studies in Corrosive Liquid Environments

Boomer, D. R.; McCune, C.C.; Fogler, H. Scott

doi:10.1063/1.1685599

Cited by 44 publications

(25 citation statements)

References 2 publications

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“…and the diffusion boundary layer thickness is [18] 1/3 / \ 1/2 6 rf s 1.611-It has also been reported that to safely maintain laminar conditions in a rotating disk Re should be less than 1.9 x 10 5 [19]. The diffusion boundary layer, 8 d , plays an important role in the transport behavior for fluid flows involving concentration gradients of chemical species.…”

Section: Experimental Verificationmentioning

confidence: 97%

Chemical Smoothing of Rough Metal Surfaces

Kim

Suh

1992

Journal of Engineering for Industry

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A chemical etching method is investigated as a possible approach to smoothing metal surfaces automatically. In a chemical etching process metal is removed due to chemical reaction and the dissolved species are transported away from the surface mainly by diffusion. Controlled dynamics introduced to the etchant motion provide the conditions necessary to perform preferential material removal such that an irregular surface is smoothed. A simplified model for the smoothing process based on fundamental mass transfer understandings is presented. Experimental results of smoothing electric discharge machined 440 stainless steel specimens are also presented. This work is motivated by the need to develop a cost effective way to manufacture molds during secondary processing.

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Section: Experimental Verificationmentioning

confidence: 97%

Chemical Smoothing of Rough Metal Surfaces

Kim

Suh

1992

Journal of Engineering for Industry

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“…This instrument has been extensively used to investigate the reaction of acids and chelating agents with carbonate rocks. [19][20][21][22][23][24][25][26][27][28][29][30][31][32] It has been also used to study mass and heat transfer into non-Newtonian fluids. [16][17][18] The reaction between acid and rock is a three-step process involving:…”

Section: Introductionmentioning

confidence: 99%

Reaction Kinetics of Gelled Acids With Calcite

Nasr‐El‐Din

Al-Mohammed

Al-Aamri

et al. 2006

International Oil &Amp; Gas Conference and Exhibition in China

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractHydrochloric acid is used to stimulate carbonate formations (both matrix and fracturing treatments). However, the reaction rate of the acid with carbonate minerals, especially calcite, is very fast. In addition, the viscosity of HCl solution is relatively low. Acid-soluble polymers are usually added to the acid to increase its viscosity, which is needed to enhance acid diversion during matrix acidizng and reduce acid leak-off rate during acid fracturing. Gelled acid is extensively used in matrix and acid fracturing treatments performed in carbonate formations. However, a few studies have evaluated the impact of these polymers on the reaction rate of the acid. This paper uses a rotating disk instrument to measure the reaction rate of gelled acids with calcite rocks. Measurements were conducted over a temperature range of 25 to 65ºC, a pressure of 1,000 psi, and rotational speeds of 100 to 1,000 rpm. Acid formulations that are typically used in the field were examined. Polymer concentration was varied from 0.5 to 2 wt%. The apparent viscosity of the gelled acid was measured using a Brookfield viscometer. Measurements were done for the same solutions tested with the rotating disk instrument. The temperature was varied from 25 to 100ºC, while the pressure was maintained at 300 psi. The shear rate was varied from 57 to 1,700 s -1 .The results obtained indicated that the apparent viscosity increased notably as the concentration of polymer increased from 0.5 to 1.5 wt%. On the other hand, there is significant decrease in the dissolution rates as the concentration of polymer was increased from 0.5 to 1.5 wt%, where there was no measure difference as the concentration increased to 2 wt%. Reverse and toroidal flows were noted within the rotational spends examined. The etching pattern on the surface of the disk depends, among other factors, on the disk rotational speed and polymer concentration. The dissolution rate was found to be a function of temperature, rotational spend and polymer concentration.

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“…Between 100 and 2000 rpm is the rotating speed range of this rotating reactor. Boomer & McCune (1972) designed and used a rotating disk apparatus for studying the reaction between calcium carbonate disks and hydrochloric acid. This apparatus can be operated in enormously corrosive liquid environments under controlled pressures and temperatures up to 70 atm and 150 o C. The calcium carbonate disks were cut from a white Vermont marble (analyzed as 98-99% calcium carbonate) with 5.1 cm in diameter and 0.64 cm thickness.…”

Section: Rotating Disk Reactormentioning

confidence: 99%

“…The rotating disk instrument is increasingly being applied in the laboratory to study the reaction between fluids and solid surfaces. It is widely used in the petroleum industry for kinetic studies of the reaction of acidic fluids and chelating agents with reactive rock (Boomer, Mccune & Fogler, 1972;Fredd & Fogler, 1998;K. Lund, Fogler & Mccune, 1973;K.…”

Section: Introductionmentioning

confidence: 99%

Rotating Disk Apparatus: Types, Developments and Future Applications

Rashed¹,

Abdulbari²,

Salleh³

et al. 2016

MAS

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Power consumption reduction investigations attracted the attention of enormous numbers of researchers in the past few decades due to its high academic and economic impacts. The pumping power losses during the transportation of crude oils are considered as one of the main power consuming applications due to the turbulent mode of transportation. Investigating the possible solutions for this problem is expensive and time consuming due to the large apparatuses needed to simulate the flow in real pipelines. Rotating disk apparatus (RDA) is an instrument mainly comprising a rotating disk and an electrical motor to rotate the disk, which was implemented as an efficient and economical path to simulate what can be done in pipelines through generating a controlled degree of turbulence. This technique was also used in many other scientific applications due to its dynamic mode of operation. For example, a rotating disk electrode was used in electrodeposition processes and to characterize deposition film thickness and uniformity. The rotating disk reactor was employed to investigate the reaction rate between fluids and solid surfaces. The present work evaluates the RDA from different prospective and applications in order to introduce it as an efficient research tools for future dynamic investigations.

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Rotating Disk Apparatus for Reaction Rate Studies in Corrosive Liquid Environments

Cited by 44 publications

References 2 publications

Chemical Smoothing of Rough Metal Surfaces

Chemical Smoothing of Rough Metal Surfaces

Reaction Kinetics of Gelled Acids With Calcite

Rotating Disk Apparatus: Types, Developments and Future Applications

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