In Situ ATR-FTIR Study of the Early Stages of Fly Ash Geopolymer Gel Formation

Langmuir ◽  
2007 ◽  
Vol 23 (17) ◽  
pp. 9076-9082 ◽  
Author(s):  
Catherine A. Rees ◽  
John L. Provis ◽  
Grant C. Lukey ◽  
Jannie S. J. van Deventer
Keyword(s):  
Fly Ash ◽  
Gel Formation ◽  
Ftir Study ◽  
Early Stages

In-situ reaction between arsenic/selenium and minerals in fly ash at high temperature during blended coal combustion

2020 ◽  
Vol 48 (11) ◽  
pp. 1356-1364
Author(s):  
Jun HAN ◽  
Yang-shuo LIANG ◽  
Bo ZHAO ◽  
Zi-jiang XIONG ◽  
Lin-bo QIN ◽  
...  
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Coal Combustion ◽  
In Situ Reaction ◽  
Blended Coal

scholarly journals Facile Preparation of Mesoporous MCM-48 Containing Silver Nanoparticles with Fly Ash as Raw Materials for CO Catalytic Oxidation

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Dong Tian ◽  
Yonghong Chen ◽  
Xiaoyong Lu ◽  
Yihan Ling ◽  
Bin Lin
Keyword(s):  
Silver Nanoparticles ◽  
Fly Ash ◽  
Co Oxidation ◽  
Surface Composition ◽  
Raw Materials ◽  
Silica Source ◽  
Co Conversion ◽  
Co Catalytic Oxidation ◽  
Adsorption Desorption

An environmentally friendly method was proposed to prepare mesoporous Mobil Composition of Matter No.48 (MCM-48) using fly ash as the silica source. Silver nanoparticles were infiltrated on MCM-48 facilely by an in situ post-reduction method and evaluated as an effective catalyst for CO oxidation. The as-prepared MCM-48 and Ag/MCM-48 nanoparticles were characterized by XRD, N2 adsorption/desorption, and TEM. Investigations by means of XPS for Ag/MCM-48 were performed in order to illuminate the surface composition of the samples. Studies revealed the strong influence of the loading of Ag nanoparticles on catalysts in the oxidation of CO. CO conversion values for Ag/MCM-48 of 10% and 100% were achieved at temperatures of 220 °C and 270 °C, respectively, indicating that the Ag-decorated MCM-48 catalyst is extremely active for CO oxidation.

In-situ carbonation of alkali activated fly ash geopolymer

2014 ◽  
Vol 66 ◽  
pp. 781-786 ◽  
Author(s):  
Ehsan Ul Haq ◽  
Sanosh Kunjalukkal Padmanabhan ◽  
Antonio Licciulli
Keyword(s):  
Fly Ash ◽  
Alkali Activated

FTIR study of self-protonation and gel formation in pyridinic solutions of poly(4-vinylpyridine)

2000 ◽  
Vol 24 (3) ◽  
pp. 109-111 ◽  
Author(s):  
Mark Rozenberg ◽  
Evgenya Vaganova ◽  
Shlomo Yitzchaik
Keyword(s):  
Gel Formation ◽  
Ftir Study

Thermodynamics of In Situ Formation of Mg2Si and MgO in AZ91D /Flyash Composites

2011 ◽  
Vol 686 ◽  
pp. 378-381
Author(s):  
Si Rong Yu ◽  
Zhi Qiu Huang ◽  
Jia An Liu
Keyword(s):  
Fly Ash ◽  
Thermodynamic Calculation ◽  
Interfacial Reactions ◽  
Mg Alloy ◽  
Free Enthalpy ◽  
Alloy Matrix ◽  
Microstructure Observation ◽  
Enthalpy Changes ◽  
Fly Ash Cenospheres

Novel AZ91D Mg alloy/fly-ash cenospheres (AZ91D/FAC) composites were fabricated by melt stir technique. The thermodynamic analyses of the interfacial reactions, the microstructure observation, and the phase analyses of the AZ91D/FAC composites were investigated. The results showed that the cenospheres were almost filled with Mg alloy matrix. In-situ MgO and Mg2Si phases were formed in Mg alloy matrix and near the interfaces between the cenospheres and Mg alloy matrix. Through the thermodynamic calculation, it can be found that the standard free enthalpy changes of these interfacial reactions are all negative at the temperature of Mg alloy melt preparation in this work, and these reactions can occur.

Early stages of oxidation observed by in situ thermogravimetry in low pressure atmospheres

2014 ◽  
Vol 86 ◽  
pp. 183-188 ◽  
Author(s):  
M. Auinger ◽  
A. Vogel ◽  
D. Vogel ◽  
M. Rohwerder
Keyword(s):  
Low Pressure ◽  
Early Stages
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