نتایج جستجو برای: desilication

تعداد نتایج: 92  

Journal: :Angewandte Chemie 2021

Introducing hierarchical porosity to zeolites is vital for providing molecular access microporous domains. Yet, the dynamics of meso- and macropore formation has remained elusive pore space ill-characterized by a lack (in situ) microscopic tools sensitive nanoporosity. Here, we probe within zeolite ZSM-5 crystal in real-time situ fluorescence microscopy during desilication. In addition, introdu...

Journal: :Chem catalysis 2023

Zeolites are the catalytic workhorses of various relevant reactions, primarily because their acidic properties. However, there have been few studies on unraveling influence Al distribution acid-catalyzed reactions at mesoscopic and microscopic levels. Taking methanol-to-aromatics (MTA) process as a paradigm, we compared performance two H-ZSM-5 zeolites with comparable properties, except for dis...

Journal: :Mediterranean Journal of Chemistry 2021

<p align="justify">The modification of natural zeolite has been conducted by dealumination and desilication using HCl NaOH treatments as a catalyst for hydrocracking used cooking oil into biogasoline. This research aimed to study the effect on activity selectivity process. A variety catalysts was prepared applying 3, 6, 9 M in produce DNZ(3-1), DNZ(3-2) DNZ(3-3), DNZ(6-1), DNZ(6-2), DNZ(6...

Journal: :Geology 2023

Abstract Chemical exchange between silicate magmas and carbonate rocks has major implications for igneous fractionation, atmospheric CO2 flux, formation of mineral deposits. However, this process is only partly understood, long-standing questions whether, where, how can be digested by melts remain controversial. We describe evidence pervasive chemical melt rock in a shallow porphyry setting dri...

Journal: :Advanced Materials Interfaces 2021

The impact of zeolite hierarchization is often highlighted in terms increased mesopore volume or specific surface area and preservation micropore volume. Yet, although these targets may be achieved, the accessibility to certain micropores might negatively affected during hierarchization. A set hierarchical MCM-22 based materials prepared on desilication treatments MCM-22, layered precursor MCM-...

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