Study on kinetics of coal pyrolysis at different heating rates to produce hydrogen

Thermal Transformation of Metallized Plastic Packaging Waste into Value-Added Al/Al3C4/AlN Resources

“…The activation energy, E a , represents the minimum energy required for the degradation; the chain reaction fractional order, n, gives information on how the reaction proceeds with the amount of volatiles released, while the pre-exponential factor A implies the degree of the molecular collision between the molecules of MPPW. 28 As seen from Table 2, the E a values of MPPW increase with the increase of heating rate, establishing a similar trend with the decomposition of moso bamboo 27 and coal 29 in the literature. This phenomenon was explained as more reactions involving stable and low-energy intermediates, and radicals were triggered simultaneously at a higher heating rate thus leading to a higher requirement for the activation energy E a .…”

Effects of low-temperature pretreatment on enhancing properties of refuse-derived fuel via microwave irradiation

“…Moreover, the time it took for the microwaves to reach the set temperature showed decreases along with an increase in microwave power (Figure 3). The heating rate of RDF was proportional to the irradiation microwave power, confirming former researches (Angin, 2013;Guo et al, 2013). In addition, the temperature increment was quite fast before the temperature reached 110℃, which should be attributed to the water fraction, which is a great microwave absorber.…”

Production of Hydrogen‐Rich Syngas from Lignite using Different Pyrolysis Methods

“…It can be seen from Figure that the generation of hydrogen was the fastest by the isothermal pyrolysis method. This is mainly because the hydrogen generation depends on the polymerization of the aromatic structures in lignite, and that reaction only occurs at high temperatures . During the isothermal pyrolysis, the surface temperature of the lignite sample reaches a relatively high value for pyrolysis rapidly.…”

“…This is mainly because the hydrogen generation dependso nt he polymerization of the aromatic structures in lignite, [22][23][24] and that reaction only occurs at high temperatures. [25] During the isothermal pyrolysis,t he surface temperature of the lignite sample reachesarelatively high value for pyrolysis rapidly. However, during the temperature-programmedp yrolysis and microwave pyrolysis,t he lignite needed minutes of heatingt or each ahigh temperature.…”