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以玉米（玉米属）秸秆灰为原料水热合成A型沸石及其表征

Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash.

作者信息

Pangan Norway, Gallardo Susan, Gaspillo Pag-Asa, Kurniawan Winarto, Hinode Hirofumi, Promentilla Michael

机构信息

Arts and Sciences Department, Technological University of the Philippines, Taguig 1630, Philippines.

Chemical Engineering Department, De La Salle University of the Philippines, Manila 0922, Philippines.

出版信息

Materials (Basel). 2021 Aug 29;14(17):4915. doi: 10.3390/ma14174915.

DOI:10.3390/ma14174915
PMID:34501004
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8433628/
Abstract

This study deals with the impact of calcination, alkalinity, and curing time parameters on the hydrothermal synthesis of zeolite A. The zeolite A sample, produced from corncob-stalk-and-leaves (corn stover) ash was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that calcination, alkalinity, and curing time have significant effects on the crystallization and the morphology of zeolite A. In addition, these parameters also impacted the cation exchange capacity. Furthermore, the synthesized zeolite A was obtained using a calcination temperature of 500 °C within two hours of airflow, which is much lower than the temperatures previously reported in the literature for an agricultural waste and other waste materials. A fusion ratio of corn stover ash:NaOH of 1.0:1.5 and a curing time of nine hours were achieved. This is a major result as this curing time is much lower than those featured in other studies, which can reach up to twenty-four hours. In this paper, cubic crystal with rounded edge of zeolite A, having a cation exchange capacity of 2.439 meq Na/g of synthesized anhydrous zeolite A, was obtained, which can be a good candidate for ion-exchange separation.

摘要

本研究探讨了煅烧、碱度和养护时间参数对A型沸石水热合成的影响。采用X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、热重分析（TGA）和扫描电子显微镜（SEM）对以玉米秸秆和叶子（玉米秸秆）灰为原料制备的A型沸石样品进行了表征。结果表明，煅烧、碱度和养护时间对A型沸石的结晶和形态有显著影响。此外，这些参数还影响了阳离子交换容量。此外，合成的A型沸石是在500℃的煅烧温度下，在两小时的气流中获得的，这比文献中先前报道的农业废弃物和其他废弃物的温度要低得多。玉米秸秆灰与氢氧化钠的熔合比为1.0:1.5，养护时间为9小时。这是一个重要的结果，因为这个养护时间比其他研究中的养护时间要短得多，其他研究中的养护时间可达24小时。在本文中，获得了具有圆形边缘的A型沸石立方晶体，合成的无水A型沸石的阳离子交换容量为2.439 meq Na/g，它可以作为离子交换分离的良好候选材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/802a/8433628/8adf552122d8/materials-14-04915-g012.jpg
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