微波辅助偏高岭土合成沸石 A 及其对 CO 吸附性能的研究。

Microwave-Assisted Synthesis of Zeolite A from Metakaolinite for CO Adsorption.

机构信息

Center for Studies in Colloidal Systems (NUESC), Laboratory of Materials Synthesis and Chromatography, Institute of Technology and Research (ITP), Tiradentes University (UNIT), Aracaju 49032-490, SE, Brazil.

Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain.

出版信息

Int J Mol Sci. 2023 Sep 13;24(18):14040. doi: 10.3390/ijms241814040.

DOI:10.3390/ijms241814040

PMID:37762341

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10530832/

Abstract

The global demand for energy and industrial growth has generated an exponential use of fossil fuels in recent years. It is well known that carbon dioxide (CO) is mainly produced, but not only from fuels, which has a negative impact on the environment, such as the increasing emission of greenhouse gases. Thus, thinking about reducing this problem, this study analyzes microwave irradiation as an alternative to conventional heating to optimize zeolite A synthesis conditions for CO capture. Synthesis reaction parameters such as different temperatures (60-150 °C) and different time durations (1-6 h) were evaluated. The CO adsorption capacity was evaluated by CO adsorption-desorption isotherms at 25 °C and atmospheric pressure. The results showed that the synthesis of zeolite A by microwave irradiation was successfully obtained from natural kaolinite (via metakaolinization), reducing both temperature and time. Adsorption isotherms show that the most promising adsorbent for CO capture is a zeolite synthesized at 100 °C for 4 h, which reached an adsorption capacity of 2.2 mmol/g.

摘要

近年来，全球对能源和工业增长的需求导致了化石燃料的大量使用。众所周知，二氧化碳（CO）主要是由燃料产生的，但不仅如此，这对环境造成了负面影响，例如温室气体排放的增加。因此，为了减少这个问题，本研究分析了微波辐射作为传统加热的替代方法，以优化用于 CO 捕获的沸石 A 合成条件。评估了不同温度（60-150°C）和不同时间（1-6 小时）等合成反应参数。通过在 25°C 和大气压下的 CO 吸附-解吸等温线评估 CO 吸附容量。结果表明，通过微波辐射从天然高岭土（通过偏高岭石化）成功获得了沸石 A 的合成，降低了温度和时间。吸附等温线表明，用于 CO 捕获的最有前途的吸附剂是在 100°C 下合成 4 小时的沸石，其吸附容量达到 2.2mmol/g。