Wardani Maryani K, Kadja Grandprix T M, Fajar Adroit T N, Makertihartha I G B N, Gunawan Melia L, Suendo Veinardi, Mukti Rino R
Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung 40132 Indonesia
Department of Chemical Engineering, Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung 40132 Indonesia.
RSC Adv. 2018 Dec 20;9(1):77-86. doi: 10.1039/c8ra08979e. eCollection 2018 Dec 19.
The generation of mesoporosity in SSZ-13 zeolite by means of desilication post alkaline treatment normally results in severe damage to the microporous framework hence giving an undesirable decline in catalytic performance. Herein, we propose a post-synthetic desilication treatment that is controllable with an aim to preserve the high crystallinity of SSZ-13 zeolite during the formation of mesopores. The extent of desilication in alkaline media is controlled by deliberately leaving the organics within SSZ-13 frameworks as they can effectively hinder the attack of hydroxyl ions on siloxane bonds. The resulting SSZ-13 exhibits substantial development of mesoporosity with preserved high crystallinity and microporosity that can then be used to relieve the mass transport issues and lead to an increased activity of LDPE pyrolysis.
通过碱处理后的脱硅作用在SSZ-13沸石中生成介孔通常会对微孔骨架造成严重破坏，从而导致催化性能出现不理想的下降。在此，我们提出一种可控的合成后脱硅处理方法，旨在在介孔形成过程中保持SSZ-13沸石的高结晶度。碱性介质中的脱硅程度通过特意在SSZ-13骨架中保留有机物来控制，因为它们可以有效阻碍氢氧根离子对硅氧烷键的攻击。所得的SSZ-13表现出介孔的显著发展，同时保留了高结晶度和微孔性，进而可用于缓解传质问题并提高低密度聚乙烯热解的活性。
