Kinetic study of mullite growth in sanitary-ware production by in situ HT-XRPD. The influence of the filler/flux ratio

Marinoni, Nicoletta; Pagani, A.; Adamo, Ilaria; Diella, Valeria; Pavese, Alessandro; Francescon, Fernando

doi:10.1016/j.jeurceramsoc.2010.10.002

Cited by 19 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Under isothermal conditions, the experimental setup shown in Figure was used to study the kinetics of CO 2 desorption from or thermal decomposition of the spent sorbent RNH 3 + RNHCOO – obtained through the sorption of CO 2 with pure MEA on macroporous TiO 2 . Similar to the thermal decomposition processes of many other compounds, − the general thermal decomposition model of RNH 3 + RNHCOO – or CO 2 desorption can be represented with the following equation: F ( α ) = k t where k is the rate coefficient of − or CO 2 desorption, t is the reaction time of −, and F (α) is the function of α, the mass fraction of decomposed (RNH 3 ) + (RNHCOO) − at any reaction time ( t ).…”

Section: Resultsmentioning

confidence: 99%

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process

2011

View full text Add to dashboard Cite

Monoethanolamine (MEA)/macroporous TiO 2 sorbent is a promising material for CO 2 separation because of its low energy demand. Similar to other CO 2 separation technologies, CO 2 desorption from the MEA/macroporous TiO 2 sorbent is the most energy-intensive step in the overall CO 2 separation process. The presence of water during the CO 2 desorption process leads to a significant increase in energy consumption. Therefore, CO 2 desorption in the absence of water is an important method to reduce energy consumption of CO 2 separation using MEA/macroporous TiO 2 , which is determined by several major factors, including desorption kinetics. However, the study on CO 2 desorption kinetics of supported MEA is lacking. This research was designed to make progress in this area. The CO 2 desorption kinetic model of the MEA/macroporous TiO 2 sorbent is experimentally derived with the data collected within the water-free desorption environment and theoretically proven by the pseudo-steady-state theory. The AvramiÀErofeyev mechanism controls the CO 2 desorption process, which is first-order with respect to RNH 3 + RNHCOO À , RNH 3 + , or RNHCOO À . The activation energy of the CO 2 desorption process is 80.79 kJ/mol. The kinetic characteristics of the CO 2 desorption are much superior to those associated with aqueous MEA-based CO 2 separation. The energy savings because of the use of MEA/macroporous TiO 2 for CO 2 separation not only results from avoiding the use of water, with its high specific heat capacity and high vaporization enthalpy, but also from the favorable desorption kinetics of the MEA/macroporous TiO 2 -based CO 2 separation.

show abstract

Section: Resultsmentioning

confidence: 99%

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process

2011

View full text Add to dashboard Cite

show abstract

“…Values of k and E g for the growth process were also reported. In more complex silicate compositions (Kaolin-quartz-feldspar), 18 it was shown that the rapid mullite nucleation is followed by a two-dimensional growth of nuclei, with f (x) = − ln (1 − x) 0.5 . The common point of these studies is the evidence of a delayed mullite growth at temperatures above the exothermic peak.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic kinetic of the kaolinite to mullite reaction sequence in multilayer ceramics

Boussois¹,

Tessier-Doyen²,

Blanchart³

2013

Journal of the European Ceramic Society

View full text Add to dashboard Cite

“…SEM observations presented the typical microstructure of porcelain consisting of quartz grains held together by a dense matrix composed of primary and secondary mullite crystals (Figs. 1c and 2c) [51,52]. Table II summarizes the bending strength, water absorption, and linear shrinkage of the Sanitser VC and conventional VC.…”

Section: Discussionmentioning

confidence: 99%

Effects of sintering temperature on microstructure and properties of sanitaryware ceramic produced with waste material

et al. 2021

View full text Add to dashboard Cite

This paper aims at exploring the possibility of using a great percentage of recycled materials into vitreous china (VC), thus, contributing to urban waste decrease while lowering the industry's buying costs, previously optimized, for the sanitaryware production. The recycled blend was introduced in the ceramic slip, Sanitser VC, and used in three sanitaryware production plants. This slip let to improve the environmental performances of the overall ceramic production through energy-saving and a decrease in greenhouse gas emissions. In fact, the firing temperature is 80-100 °C lower than traditional production. Therefore, the objective of this paper was to evaluate the firing behavior, technological properties, and microstructure of a typical industrial vitreous china body in comparison with Sanitser VC. The analytical results confirmed the force of this idea and highlighted the advantages of the choice made.

show abstract

Kinetic study of mullite growth in sanitary-ware production by in situ HT-XRPD. The influence of the filler/flux ratio

Cited by 19 publications

References 24 publications

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process

Anisotropic kinetic of the kaolinite to mullite reaction sequence in multilayer ceramics

Effects of sintering temperature on microstructure and properties of sanitaryware ceramic produced with waste material

Contact Info

Product

Resources

About

Kinetic study of mullite growth in sanitary-ware production by in situ HT-XRPD. The influence of the filler/flux ratio

Cited by 19 publications

References 24 publications

Desorption Kinetics of the Monoethanolamine/Macroporous TiO2-Based CO2 Separation Process

Desorption Kinetics of the Monoethanolamine/Macroporous TiO2-Based CO2 Separation Process

Anisotropic kinetic of the kaolinite to mullite reaction sequence in multilayer ceramics

Effects of sintering temperature on microstructure and properties of sanitaryware ceramic produced with waste material

Contact Info

Product

Resources

About

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process

Desorption Kinetics of the Monoethanolamine/Macroporous TiO₂-Based CO₂ Separation Process