DataVXACS Materials LettersPaper
journal article·2023-01-02Open access

Direct Synthesis of Highly Siliceous ZnO-FAU Zeolite with Enhanced Performance in Hydrocarbon Cracking Reactions

Deependra Parmar, Adam J. Mallette, Noemi Linares, Sarah A. Saslow, Tanguy Terlier, James J. Strohm, Lee P. Barber, Heng Dai, Javier García-Martínez, Jeffrey D. Rimer

ACS Materials Letters· Volume 5· Issue 1
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Source abstract

Abstract

The hydrothermal stability and catalytic activity of zeolite Y (faujasite, FAU) is highly dependent on its composition. High silicon content is often desirable for catalytic applications; however, direct synthesis of faujasite with high silicon content (Si/Al > 2.5) is nontrivial. Here, we present an organic-free synthesis of FAU-type zeolite with Si/Al = 3.4 using zinc oxide as a modifier. A combination of spectroscopy and microscopy techniques confirms that ZnO is well-distributed within zeolite pores as extra-framework species, and the nature of these species differs from bulk ZnO and framework zinc in Zn-FAU crystals. We demonstrate that the increased Si/Al ratio leads to improved hydrothermal stability, while catalytic cracking of 1-hexene and cumene show that ZnO-FAU exhibits a significantly longer lifetime compared to in-house and commercial zeolite Y. Collectively, this study presents a facile and efficient method to prepare more siliceous FAU with enhanced catalytic performance.
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Research context

Catalysis & surfaces

OpenAlex topics: Zeolite Catalysis and Synthesis · Metal-Organic Frameworks: Synthesis and Applications · Mesoporous Materials and Catalysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical and Biomolecular Engineering, University of Houston, 4226 Martin Luther King Blvd., Houston, Texas 77204, United States

Molecular Nanotechnology Lab, Department of Inorganic Chemistry, University of Alicante, Campus de San Vicente del Raspeig, 03690 San Vicente del Raspeig Alicante, Spain

Earth Systems Science Division, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States

Shared Equipment Authority, SIMS Laboratory, Rice University, 6100 Main Street, Houston, Texas 77005, United States

Albemarle Corporation, 13000 Bay Park Road, Pasadena, Texas 77507, United States

Funding

Welch Foundation · European Commission · Agencia Estatal de Investigaci?n · Ministerio de Econom?a y Competitividad · U.S. Department of Energy · Universidad de Alicante · Horizon 2020 Framework Programme · National Science Foundation

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