Porous alumina ceramics with enhanced mechanical and thermal insulation properties based on sol-treated rice husk

2018 ◽  
Vol 44 (18) ◽  
pp. 22616-22621 ◽  
Author(s):  
ZhiPeng Wei ◽  
Shujing Li ◽  
Yuanbing Li ◽  
XueSong Li ◽  
Ruofei Xiang ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Rice Husk ◽  
Porous Alumina ◽  
Alumina Ceramics

scholarly journals Evaluation of mechanical properties of porous alumina ceramics obtained using rice husk as a porogenic agent

Cerâmica ◽  
2019 ◽  
Vol 65 (suppl 1) ◽  
pp. 70-74 ◽  
Author(s):  
G. C. Ribeiro ◽  
B. A. Fortes ◽  
L. da Silva ◽  
J. A. Castro ◽  
S. Ribeiro
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Porous Alumina ◽  
Alumina Ceramics

Novel design of elongated mullite reinforced highly porous alumina ceramics using carbonized rice husk as pore-forming agent

2019 ◽  
Vol 45 (11) ◽  
pp. 13964-13970 ◽  
Author(s):  
Jingjing Liu ◽  
Bo Ren ◽  
Yuju Lu ◽  
Xiaoqing Xi ◽  
Yajie Li ◽  
...  
Keyword(s):  
Rice Husk ◽  
Porous Alumina ◽  
Alumina Ceramics ◽  
Novel Design ◽  
Highly Porous

Rice Husk Combustion in a BFBC Using Porous Bed Material

2005 ◽  
Author(s):  
Tadaaki Shimizu ◽  
Takumi Nemoto ◽  
Hotaka Tsuboi ◽  
Toshio Shimoda ◽  
Syunji Ueno
Keyword(s):  
Rice Husk ◽  
Porous Alumina ◽  
Silica Sand ◽  
Stable Operation ◽  
N2o Emissions ◽  
Nox Emissions ◽  
Bed Materials ◽  
Average Size ◽  
Bed Material ◽  
Fluidized Bed Combustor

Rice husk was burned in a bench-scale fluidized bed combustor (53 mm I.D. and 1.3m height) at 1123 K. Silica sand (average size 0.27 mm) was employed as conventional bed material. As an alternative bed material, a kind of porous alumina (average size 0.69 mm) was employed. Unburned gas (CO) emissions were suppressed by employing porous alumina as bed material. NOx emissions from the alumina bed were also suppressed in comparison to the sand bed. N2O emissions were nearly negligible (less than 10 ppm) for both bed materials. During combustion in the sand bed, sudden temperature rise up to 1450 K and increase in pressure drop across the bed were observed. Agglomerates were found in the bed material after the experiments. For the porous alumina bed, such agglomeration trouble did not occur. As conclusion, the present porous alumina was effective for both reduction of pollutants emissions and stable operation.

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