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通过甲醇制烃转化评估铁硅铝酸盐MFI沸石的酸催化性能。

Assessment of acid catalytic properties of ferrosilicate MFI zeolite by methanol-to-hydrocarbon conversion.

作者信息

Park Hanyoung, Na Gwang-Jin, Kim Jeong-Chul, Ryoo Ryong

机构信息

Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea.

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea.

出版信息

RSC Adv. 2024 Sep 12;14(40):29006-29013. doi: 10.1039/d4ra05039h.

DOI:10.1039/d4ra05039h
PMID:39282068
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11391894/
Abstract

Four representative synthetic methods were employed to prepare Fe-containing siliceous MFI zeolites. The obtained Fe-MFI zeolites exhibited markedly different catalytic performances in the methanol-to-hydrocarbon (MTH) conversion reaction depending on the type of Fe incorporation within the siliceous framework. The catalytically active Brønsted acid sites were analyzed using pyridine adsorption experiments combined with Fourier transform infrared spectroscopy, providing characteristic signal intensities according to the acid-base interactions. Based on the MTH conversion results and acidity analyses, a suitable synthetic method was identified for the incorporation of Fe within the MFI zeolite framework. However, compared to other catalytic reactions, structural analyses by transmission electron microscopy, ultraviolet-visible spectroscopy, and X-ray absorption spectroscopy were much less conclusive.

摘要

采用四种具有代表性的合成方法制备含铁硅质MFI沸石。所得的铁MFI沸石在甲醇制烃（MTH）转化反应中表现出明显不同的催化性能，这取决于硅质骨架中铁的掺入类型。使用吡啶吸附实验结合傅里叶变换红外光谱对催化活性的布朗斯台德酸位点进行了分析，根据酸碱相互作用提供了特征信号强度。基于MTH转化结果和酸度分析，确定了一种适合在MFI沸石骨架中掺入铁的合成方法。然而，与其他催化反应相比，通过透射电子显微镜、紫外可见光谱和X射线吸收光谱进行的结构分析得出的结论性要小得多。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/2e34515c383a/d4ra05039h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/5abfff9cd465/d4ra05039h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/e797b55630fd/d4ra05039h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/adb976b94052/d4ra05039h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/5ee28510ec57/d4ra05039h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/2e34515c383a/d4ra05039h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/5abfff9cd465/d4ra05039h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/e797b55630fd/d4ra05039h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/adb976b94052/d4ra05039h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/5ee28510ec57/d4ra05039h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb5c/11391894/2e34515c383a/d4ra05039h-f5.jpg

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本文引用的文献

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酸度在块状和纳米片状[T]MFI（T = 铝、镓、铁、硼）沸石甲醇制烃反应中的作用
ChemCatChem. 2017 Oct 23;9(20):3942-3954. doi: 10.1002/cctc.201700916. Epub 2017 Sep 14.
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