Kinetics of the thermal decomposition of aluminum sulfate

Studies on thermal stability and nonisothermal thermal decomposition kinetics of vinyl chloride–vinyl acetate copolymer prepared via microsuspension polymerization

“…Table IV shows that the values of E a and A for different heating rates in nitrogen vary regularly and the values of E a and A decrease at first and then approach constant values with increasing of the heating rate. These results are similar to those of Chou and Soong 5…”

Simulação Termodinâmica E Modelagem Cinética Do Processo De Decomposição De Sulfatos Com Diferentes Níveis De Estabilidade Térmica Na Presença De Catalisadores

“…For the subsequent steps, the calculated activation energy values are 454.18 and 207.18 kJ.mol -1 respectively, it can be observed that the decomposition step of NH 4 Al(SO 4 ) 2 to Al 2 (SO 4 ) 3 being the one that demands the most energy. The activation energy value referring to the last decomposition step, arising from the aluminum sulfate reaction giving rise to its oxide, in this work was 12 -30% lower than that observed in reports by Rego et al [57], Chou and Song [72] and Gallagher and Johnson [73] using the graphical method, the apparent order around 1.7 is in agreement with what is found in the literature. It can be assumed that the presence of palladium was responsible for catalyzing the decomposition of the salt, in fact this occurs for other metallic sulfates with higher decomposition temperature such as magnesium and zinc [27][28].…”

Study of a Thermochemical Heat Storage Reactor Filled with Polyaluminum Sulfate for Low-Temperature Application

“…The validation experiment involved determining the thermal conductivity of well-known materials and comparing the data to the literature data. The thermal conductivity of the PAS was also determined later, and data were compared to the one previously obtained using the DSC/TGA method [10][11][12]. A fluid (dry air) and a solid (glass) with a known thermal conductivity to fill the gap were employed.…”