| dc.description.abstract | This thesis primarily focuses on using Metal-Organic Framework (MOF) materials as experimental subjects, with sodium carboxymethyl cellulose (CMC-NA) as a binder. The experimental equipment, provided by the Industrial Technology Research Institute (ITRI), includes a wet basket-feed extruder and a spheronizer, which are used for wet granulation of MOF powders through extrusion spheronization. By adjusting various parameters such as the moisture content of the wet mass, binder concentration, binder solid content, extruder shaft speed, extruder screen size, spheronizer speed, and spheronizer load, the ultimate goal is to investigate the mechanism of the extrusion spheronization process. This is achieved by altering different granulation parameters to enhance the quality of MOF granules. This study specifically examines the granulation mechanism related to the final particle size distribution, particle aspect ratio, particle strength, and particle velocity field.
The experimental results indicate that moisture content is a crucial parameter for extrusion spheronization granulation. When the moisture content is too low, the extrudate becomes brittle and cannot form spherical granules properly, resulting in the cylindrical extrudate breaking into fine powder. Conversely, if the moisture content is too high, the extrudate becomes viscous, causing the granules to stick together too quickly, leading to the formation of oversized agglomerates. Only with an appropriate moisture content does the extrudate exhibit suitable plasticity, allowing for the gradual formation of uniform and dense spherical granules during the spheronization process.Furthermore, the operating parameters such as the extruder spindle speed, screen hole size, and granulator load significantly influence the quality of the MOF granules. These parameters will be discussed in more detail in this thesis. | en_US |