Dehydration of sodium carbonate monohydrate with indirect microwave heating

Seyrankaya, Abdullah; Özalp, Barış

doi:10.1016/j.tca.2006.06.020

Cited by 13 publications

(18 citation statements)

References 11 publications

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“…Thermal runaway, a complicated phenomenon occurs due to the size and geometry of samples, dielectric properties, etc., is highly absent in this case, which normally takes a major role and hinders the complete process. [33] According to the present study, drying of plaster begins approximately 20 s after the operation commences, and a steady-state conversion is attained. As seen from Fig.…”

Section: Microwave Adsorption Characteristicsmentioning

confidence: 59%

“…At a fixed microwave frequency, only the material properties e Ã and tan d determine the total power dissipated within the sample. [33][34][35] Further, both the parameters depend strongly on temperature. To study the interaction characteristics of plaster with water, raw plaster and water were individually spread on the Teflon-lined sheet, placed into a microwave oven, and then irradiated at three power levels.…”

Section: Characterization Of Plaster and Watermentioning

confidence: 96%

“…To enlighten the influence of microwave heating, the specific heat, thermal conductivity, and dielectric properties of materials were considered [33,34] ( Table 1). At a fixed microwave frequency, only the material properties e Ã and tan d determine the total power dissipated within the sample.…”

Section: Characterization Of Plaster and Watermentioning

confidence: 99%

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Characterization and Process Optimization of Microwave Drying of Plaster of Paris

2008

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The changes in the characteristics of plaster of Paris (pop) during drying operation under microwave irradiation conditions, namely surface morphology, effective moisture diffusivity, and absorption of microwave, were studied. The drying characteristics and kinetics of the process during microwave drying of plaster were studied for rectangular-faced cuboids (80 Â 70 Â 15, L Â B Â H in mm) through various drying parameters like microwave power input, initial moisture content, and drying time. Further, the experimental data on moisture ratio of plaster for different operating conditions were obtained and the optimization of the microwave drying process parameters was performed with response surface methodology (RSM) by considering all the above-said independent variables. Based on the RSM analysis, the optimum values of the process variables were obtained as: initial moisture content (A) 60%; microwave power input (B) 180 W; and drying time (C) 480 S.

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Section: Microwave Adsorption Characteristicsmentioning

confidence: 59%

Section: Characterization Of Plaster and Watermentioning

confidence: 96%

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Characterization and Process Optimization of Microwave Drying of Plaster of Paris

2008

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“…At higher temperatures (between 650-900 8C) a 1.8 % mass-loss exothermic event occurred. According to Seyrankaya and Ozalp, [17] thermonatrite is converted into anhydrous sodium carbonate by removal of crystal water by heating at temperatures above 120 8C, according to reaction (2): Na 2 CO 3 :H 2 O ðsÞ ! Na 2 CO 3ðsÞ þ H 2 O ðgÞ ð2Þ…”

Section: Resultsmentioning

confidence: 99%

Influence of drying temperature and atmosphere on the mechanical strength of iron‐ore agglomerates and sodium silicates for application in sintering processes

et al. 2015

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This paper presents the influence of drying temperature and atmosphere on the mechanical strength of iron-ore agglomerates and sodium silicates. Mixtures of different pellet feed and sodium silicates were produced with a ball disc and cured at various temperatures. The resulting products exhibited sufficiently high mechanical strength to be transported over long distances and handled until their use in sintering processes. The agglomerates were dried/cured at temperatures between 100-550 8C and in gaseous atmospheres consisting of air and/or carbon dioxide. During this process, a strong influence of both temperature and atmosphere on the compression strength after contact with water, as well as on the morphology of the sodium silicates, was observed. The use of carbon dioxide atmosphere during drying proved effective for achieving high mechanical strength after water immersion. A phenomenological approach was developed to explain the results in order to connect morphology and mechanical properties.

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“…Even, uniformly dispersed alumina-30 vol.% SiC particulate gel composite was prepared by this process (Ananthakumar et al 1998). Further, dehydration of sodium carbonate monohydrate has also been performed using this technique (Seyrankaya and Ozalp 2006).…”

Section: Dryingmentioning

confidence: 99%

Prospects of microwave processing: An overview

et al. 2009

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Microwave processing has been emerging as an innovative sintering method for many traditional ceramics, advanced ceramics, specialty ceramics and ceramic composites as well as polymer and polymer composites. Development of functionally gradient materials: joining; melting; fibre drawing; reaction synthesis of ceramics; synthesis of ceramic powder, phosphor materials, whiskers, microtubes and nanotubes; sintering of zinc oxide varistors; glazing of coating surface and coating development have been performed using microwave heating. In addition, microwave energy is being explored for the sintering of metal powders also. Ceramic and metal nanopowders have been sintered in microwave. Furthermore, initiatives have been taken to process the amorphous materials (e.g. glass) by microwave heating. Besides this, attempt has been made to study the heating behaviour of materials in the electric and magnetic fields at microwave frequencies. The research is now focused on the use of microwave processing for industrial applications.

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Dehydration of sodium carbonate monohydrate with indirect microwave heating

Cited by 13 publications

References 11 publications

Characterization and Process Optimization of Microwave Drying of Plaster of Paris

Characterization and Process Optimization of Microwave Drying of Plaster of Paris

Influence of drying temperature and atmosphere on the mechanical strength of iron‐ore agglomerates and sodium silicates for application in sintering processes

Prospects of microwave processing: An overview

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