Dear seniors, what impact does the mechanical strength of coal have on the gasification process?
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Is there also an impact of the thermal stability of coal on gasification? What does this thermal stability refer to?
The impact of coal’s thermal stability on gasification: Coal’s thermal stability affects the amount of by-products generated during gasification. Thermal stability refers to the degree of stability of coal during high-temperature reactions, that is, whether it remains in its original particle form or breaks down into smaller particles.
I see. Is the thermal stability of coal related to the tar content in raw gas?
Mechanical strength and thermal stability are primarily relevant to fixed-bed (moving-bed) systems; if the thermal stability is poor and the material pulverizes upon heating, it will increase the diffusion resistance
Thank you, senior. I still don’t quite understand the impact of diffusion resistance on vaporization^O^
It seems that the principles of chemical engineering weren’t studied properly. In fixed-bed gasification, coal moves downward while gas moves upward. If the coal becomes pulverized, its porosity decreases, which increases the resistance to gas flow. This can lead to issues such as channeling and wall flow, as well as an increased amount of coal powder being carried away; in severe cases, it can even cause the installation to stop operating.
Well, thanks for the advice; I fall asleep as soon as I start reading Principles of Chemical Engineering. The foundation is too weak.