scholarly journals Thermochemical CO2 splitting performance of perovskite coated porous ceramics

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23049-23057
Author(s):  
Amir Masoud Parvanian ◽  
Hamidreza Salimijazi ◽  
Mehdi Shabaninejad ◽  
Ulrike Troitzsch ◽  
Peter Kreider ◽  
...  
Keyword(s):  
High Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Redox Reactions ◽  
Structural Changes ◽  
Porous Ceramics ◽  
Representative Volume ◽  
Porous Sic

A representative volume of LCMA coated porous SiC showing a maximum of 23% shrinkage when subject to high-temperature CO2 conversion redox reactions. This results in significant structural changes including a reduction in specific surface area.

scholarly journals Effect of specific surface area on syngas production performance of pure ceria in high-temperature thermochemical redox cycling coupled to methane partial oxidation

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36617-36626
Author(s):  
Manabu Heya ◽  
Xiang Gao ◽  
Antonio Tricoli ◽  
Wojciech Lipiński
Keyword(s):  
High Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Redox Reactions ◽  
Production Performance ◽  
Methane Partial Oxidation ◽  
Syngas Production ◽  
Pure Ceria ◽  
Key Parameter

Specific surface area is a key parameter determining the rates of thermochemical redox reactions in metal oxides.

Preparation of Porous Wollastonite Ceramics for Filtration

2007 ◽  
Vol 336-338 ◽  
pp. 1102-1104 ◽  
Author(s):  
Ming Sheng He ◽  
Jian Bao Li ◽  
Bo Wen Li ◽  
Hong Lin ◽  
Xiao Zhan Yang ◽  
...  
Keyword(s):  
Specific Surface ◽  
Pore Size ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sintering Temperature ◽  
Porous Ceramics ◽  
Holding Time ◽  
Starting Material ◽  
Sintering Method

Wollastonite powder was selected as a starting material with carbonate as pore-forming agent and binder added. The porous ceramics were prepared at different temperature by sintering method. The process includes batching, granulating, pressing molding, drying and sintering. It is discussed the influence of sintering temperature, dosage of binder, dosage of pore-forming agent, pressure of molding and holding time on the performance of porous ceramics. According to the principle of particles stack, the porous wollastonite ceramics for filtration with various diameters, shapes and porosity were fabricated by serial experiments. These products have 1 to 10 microns in pore size, 30.04 to 66.15% in porosity, 2.82 m2/g in specific surface area.

scholarly journals Characterization of High-Temperature Hierarchical Porous Mullite Washcoat Synthesized Using Aluminum Dross and Coal Fly Ash

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 178 ◽  
Author(s):  
Thye Foo Choo ◽  
Mohamad Amran Mohd Salleh ◽  
Kuan Ying Kok ◽  
Khamirul Amin Matori ◽  
Suraya Abdul Rashid
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Coal Fly Ash ◽  
Waste Product ◽  
Aluminum Dross ◽  
Hierarchical Porous ◽  
Porous Mullite

Mixture of aluminum dross (AD) and coal fly ash (CFA) was used to produce high-temperature porous mullite for washcoat application. CFA is the combustion by-product of pulverized coal in a coal-fired power plant, while AD is a waste product produced in secondary aluminum refining. In this study, 80 wt% of AD and 20 wt% of CFA was used to prepare a mullite precursor (MP) via acid leaching and dry-milling. The precursor was coated on a substrate and subsequently fired at 1500 °C. The results showed that the precursor transformed to a hierarchical porous microstructure assembled by large interlocked acicular mullite crystals. The pore structures consisted of large interconnected open pores and small pores. The specific surface area of the mullite washcoat was 4.85 m2g−1 after heating at 1500 °C for 4 h. The specific surface area was compatible with the specific surface area of other high-temperature washcoats.

Preparation and characterization of porous cordierite for potential use in cellular ceramics

2009 ◽  
Vol 63 (4) ◽  
Author(s):  
Marta Valášková ◽  
Gražyna Martynková
Keyword(s):  
Specific Surface ◽  
Size Distribution ◽  
Surface Area ◽  
Aluminum Hydroxide ◽  
Specific Surface Area ◽  
Porous Ceramics ◽  
High Porosity ◽  
Cordierite Ceramics ◽  
Potential Use

AbstractCordierite porous ceramics Z, X, and K were prepared using three mixtures of clay minerals: Z from kaolinite, talc, and aluminum hydroxide, X from kaolinite, talc, vermiculite, and aluminum hydroxide, and K from kaolinite, talc, and magnesium oxide. Ceramics were different in porosity, specific surface area, cordierite polymorphs, and secondary crystalline phases. Vermiculite influenced textural architecture of calcined cordierite ceramics X and predestinated crystallization of the high-temperature hexagonal α-cordierite with secondary minerals enstatite, spinel and corundum. Ceramics Z contained low-temperature orthorhombic β-cordierite, enstatite, and corundum, K was diphase of β-cordierite and forsterite. Total pore area (TPA) and specific surface area (SSA) of X, in spite of the higher porosity and the pore size distribution in the range of 300–1000 nm, were smaller in comparison with TPA and SSA of Z. Ceramics K retained high porosity, two maxima at 300–1000 nm and 50–200 nm in the pores size distribution, and the highest TPA and SSA compared to those observed in ceramics Z and X.

scholarly journals Enhanced capacitive performance by improving the graphitized structure in carbon aerogel microspheres

RSC Advances ◽  
2020 ◽  
Vol 10 (37) ◽  
pp. 22242-22249
Author(s):  
Xichuan Liu ◽  
Lei Yuan ◽  
Minglong Zhong ◽  
Shuang Ni ◽  
Fan Yang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Aerogel ◽  
High Specific Surface Area ◽  
Activation Method ◽  
Carbon Aerogels ◽  
Capacitive Performance

Carbon aerogels (CAs) microspheres with good electrical conductivity and high specific surface area were synthesized by high temperature carbonization and CO2 activation method, which exhibit an enhanced capacitive performance in supercapacitors.

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