In this work, the structural function of char gasification is modelled theoretically. Considering that different components will have different pore characteristics after pyrolysis, char is divided into different micro-structures according to its corresponding components, and then a structural equation is constructed to realize the theoretical calc...
In this work, the structural function of char gasification is modelled theoretically. Considering that different components will have different pore characteristics after pyrolysis, char is divided into different micro-structures according to its corresponding components, and then a structural equation is constructed to realize the theoretical calc...
The reaction of NO with chars of sewage sludge, refuse derived fuel (RDF), and straw was investigated in a fixed bed reactor at temperatures from 800 to 900 degrees C and NO inlet concentrations from 400 to 1500 ppmv. The effect of ash forming elements in the chars was examined by comparing the reactivity of raw and demineralized chars. Compared to...
The reaction of NO with chars of sewage sludge, refuse derived fuel (RDF), and straw was investigated in a fixed bed reactor at temperatures from 800 to 900 degrees C and NO inlet concentrations from 400 to 1500 ppmv. The effect of ash forming elements in the chars was examined by comparing the reactivity of raw and demineralized chars. Compared to...
In this study, the dry leaves litter from jackfruit, raintree, mango and eucalyptus trees, lignin, and cellulose were characterized, pyrolysed, and evaluated for their char reactivity towards CO2 gasification using TGA. The differences in char reactivity were attributed to the difference in char morphology and the varying inorganic contents. The mi...
The mechanism of the reaction between char and nitric oxide (NO) on zigzag and armchair edge structures was studied based on density functional theory (DFT). Four possible pathways were presented to illustrate the chemical processes. The results show that the activation step and the release of carbon monoxide (CO) and carbon dioxide (CO2) are the c...
The mechanism of the reaction between char and nitric oxide (NO) on zigzag and armchair edge structures was studied based on density functional theory (DFT). Four possible pathways were presented to illustrate the chemical processes. The results show that the activation step and the release of carbon monoxide (CO) and carbon dioxide (CO2) are the c...
Intermittent addition of steam was employed to increase the gasification reactivity of palm kernel shell biochar with CO2. The reactivity and variations in pore structures were initially assessed during CO2 and H2O-assisted gasification of biochars in a tube furnace, followed by characterization using thermogravimetric and surface area analysis. A ...
This study is devoted to characterizing the isothermal reaction kinetics of char gasification with CO2 in a micro fluidized bed reaction analyzer (MFBRA) in comparison to the measurement in a thermogravimetric analyzer (TGA). Under minimized inhibition of heat and mass transfer, the reaction rate was found to be much higher in the MFBRA than in the...
The modeling and numerical simulation of char burning rate within the temperature range of 1273-1700 K, which is the normal range in most boilers and furnaces, were carried out in this paper. Considering the differences in pore structure between char and non-porous carbon, several key issues were studied and discussed, including fresh char reactivi...
