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Probing the Nature of Surface Barriers on ZSM‐5 by Surface Modification
Author(s) -
Ye Guanghua,
Guo Zhongyuan,
Sun Yuanyuan,
Zhu Kake,
Liu Honglai,
Zhou Xinggui,
Coppens MarcOlivier
Publication year - 2017
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201700081
Subject(s) - zsm 5 , surface modification , deposition (geology) , materials science , zeolite , etching (microfabrication) , chemical engineering , surface (topology) , crystal (programming language) , heptane , mass transfer , nanotechnology , chemistry , catalysis , organic chemistry , layer (electronics) , chromatography , geometry , paleontology , mathematics , sediment , computer science , engineering , biology , programming language
The nature of external surface barriers in the zeolite ZSM‐5 was explored by comparing mass transfer of n ‐heptane in samples with different crystal sizes, surface structure, and composition. These different surface properties were achieved by HF acid etching and SiO 2 deposition on an as‐synthesized ZSM‐5 crystal sample. HF etching does not reduce surface barriers. SiO 2 deposition on the same sample reduces surface barriers significantly. These insights into the nature of surface barriers could be used to guide the rational design of zeolitic materials with better mass transport properties.