NANOFLUIDIC BEHAVIOR OF IODINE MOLECULES IN NANO CHANNELS OF BICONTINUOUS CONCENTRIC LAMELLAR (BCL) MORPHOLOGICAL MATERIALS AS A REFERENCE IN OPEN CHANNEL CATALYSIS TRANSPORT KINETICS

• Main Author: Megantari, Vetty
• Format: Theses
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/42559
• Institution: Institut Teknologi Bandung

The slow mass transfer is a weakness in some porous materials. This issue can reduc_eis efficie cy when applied in the catalysis process. The pore shape of the matenal1s the mam reason that bring mass transfer limitations. In conventional pore, substrate is easily to be blocked, thus the substrate cannot reach the active site inside the pore. One of promising strategy for improving mass transport is to develop a hierarchical pore structures. KCC-1 , a new family of mesoporous silica with a unique hierarchical pore structures, combine meso- and macropores. Based on the results of SEM and TEM analysis, KCC-1 morphology is interpreted as a bicont i n uous concen tric l amellar (bel). The u n ique structu re of KCC-1 has never been observed in other sil ica materials. To understand the transport kinetics in KCC-1, a nanofluidic behavior of the diatomic molecule such as iodine was performed in KCC-1. This study can be a reference to understanding the transport kinetics on the catalysis process. In this study, we report the comparison with other types of silica having different pore structures, namely the MCM-41 and Silica Gel 60. At the earliest time, the adsorption process on KCC-1 with wide pore entrance provides better mass transport kinetics as well as a resistance to the pore mouth blocking, despite the surface area of KCC-1 is smaller than of MCM-41. However, the KCC-1 pore cannot be fully filled with iodine molecules because the open pore provide a continuous equilibrium with the bulk phases. While the MCM-41 pore can be filled with iodine molecules due to capillary condensation, but the adsorption rate is slower than KCC-1. Silica gel showed the lowest performance due to its narrow pore mouth represent with ink-bottle pore. Thus, KCC-1 offers better performance for applications as host or support In catalysis process.