scholarly journals Thermodynamics Simulation Performance of Rice Husk Combustion with a Realistic Decomposition Approach on the Devolatilization Stage

2022 ◽  
Author(s):  
Soen Steven ◽  
Pandit Hernowo ◽  
Elvi Restiawaty ◽  
Anton Irawan ◽  
Carolus Borromeus Rasrendra ◽  
...  
Keyword(s):  
Rice Husk ◽  
Decomposition Approach ◽  
Simulation Performance

scholarly journals Thermodynamics simulation performance of rice husk combustion with a realistic decomposition approach on the devolatilization stage

2021 ◽  
Author(s):  
Soen Steven ◽  
Pandit Hernowo ◽  
Elvi Restiawaty ◽  
Anton Irawan ◽  
Carolus Borromeus Rasrendra ◽  
...  
Keyword(s):  
Rice Husk ◽  
Combustion Temperature ◽  
Calorific Value ◽  
Silica Content ◽  
Ideal Gas ◽  
Boudouard Reaction ◽  
No Emission ◽  
Decomposition Approach ◽  
Simulation Performance ◽  
Excess Air

Abstract Rice husk has a great potential in its calorific value and silica content in ash which makes its valorization through combustion becomes important and interesting. This study presents the thermodynamics simulation performance of rice husk combustion using a realistic decomposition approach. A non-ideal gas approach and fugacity coefficient were also considered in the calculation. From this study, rice husk is devolatilized to form gases (63.37%), tar (8.69%), char (27.94%), and all of these are then oxidized to form flue gas. The realistic decomposition approach calculated that about 2.6 MJ/kg of specific combustion energy is produced, the maximum combustion temperature is up to 1457oC for perfect insulation condition, and up to 1400oC if there is a heat loss. It is found that combustion equipped with larger excess air could quench the heat produced and reduce the combustion efficiency but could maintain the temperature at 700oC. Furthermore, the thermodynamics simulation expressed that NO emission amount from rice husk combustion is negligible and there is still a probability for CO and H2 to be produced at above 500oC due to Boudouard reaction and homogeneous water gas shift reaction (WGSR). The study showed that a realistic decomposition approach could predict the rice husk combustion performance with a reasonable and logical result. Supplying excess air of about 180–200% is advantageous to keep the combustion temperature at 700oC in order to prevent silica crystalline formation which harms human health, as well as suppressing NO emission and reducing CO emission from the simultaneous Boudouard and WGSR.

Mechanoactivation Of Rice Husk Ash In Laboratory Conditions

2019 ◽  
pp. 20-26
Keyword(s):  
Mechanical Activation ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Silicon Oxide ◽  
Rice Husk Ash ◽  
Pozzolanic Activity ◽  
Maximum Solubility ◽  
Laboratory Conditions ◽  
Before And After ◽  
Mineral Additive

In many rice producing countries of the world, including in Vietnam, various research aimed at using rice husk ash (RHA) as a finely dispersed active mineral additive in cements, concrete and mortars are being conducted. The effect of the duration of the mechanoactivation of the RHA, produced under laboratory conditions in Vietnam, on its pozzolanic activity were investigated in this study. The composition of ash was investigated by laser granulometry and the values of indicators characterizing the dispersion of its particles before and after mechanical activation were established. The content of soluble amorphous silicon oxide in rice husk ash samples was determined by photocolorimetric analysis. The pizzolanic activity of the RHA, fly ash and the silica fume was also compared according to the method of absorption of the solution of the active mineral additive. It is established that the duration of the mechanical activation of rice husk ash by grinding in a vibratory mill is optimal for increasing its pozzolanic activity, since it simultaneously results in the production of the most dispersed ash particles with the highest specific surface area and maximum solubility of the amorphous silica contained in it. Longer grinding does not lead to further reduction in the size of ash particles, which can be explained by their aggregation, and also reduces the solubility of amorphous silica in an aqueous alkaline medium.

Desalination Technology of Water by using Rice Husk Ash

2014 ◽  
Vol 27 (2) ◽  
pp. 148-160
Author(s):  
Hassan K. Hassan ◽  
Najla J. Al-Amiri ◽  
Mohammed M. Yassen
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Desalination Technology

Parametrical Synthesis of Linear Controllers in Aperiodical Systems on Basis of Decomposition Approach

2019 ◽  
Vol 12 (4) ◽  
pp. 192
Author(s):  
Sergey Anatolevich Gayvoronskiy ◽  
Tatiana Ezangina ◽  
Maxim Pushkarev ◽  
Ivan Khozhaev
Keyword(s):  
Decomposition Approach ◽  
Linear Controllers

MATERIAL DEVELOPMENT FROM RICE HUSK FOR CO2 CAPTURE

2018 ◽  
Author(s):  
Premanath Murge ◽  
Srikanta Dinda ◽  
Bipin Chakravarthy ◽  
Sounak Roy
Keyword(s):  
Rice Husk ◽  
Co2 Capture ◽  
Material Development

STUDIES ON CONTINUOUS ADSORPTION OF ACETIC ACID FROM AQUEOUS SOLUTION USING RICE HUSK ADSORBENT

2018 ◽  
Vol 14 (1) ◽  
pp. 42
Author(s):  
S. V. A. R. SASTRY ◽  
SRI ADIBATLA ANUSHA ◽  
S. VARUN ◽  
◽  
◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Rice Husk ◽  
Continuous Adsorption
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