文献类型：期刊文献

英文题名：Coal fly ash to Y zeolite of great purity and crystallinity: A new and green activation method of combined in situ microwave and ultrasound

作者：Chen, Zongrong Song, Guoqiang Li, Claudia Chen, Wenting Li, Ziwei Kawi, Sibudjing

第一作者：Chen, Zongrong

通信作者：Li, ZW[1];Song, GQ[2];Song, GQ[3];Kawi, S[3]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[3]Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;[4]Jiangxi Normal Univ, Coll Chem & Chem Engn, Key Lab Funct Small Mol, Minist Educ, Nanchang 330022, Peoples R China

第一机构：Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore.|贵州理工学院化学工程学院;贵州理工学院;

年份：2023

卷号：136

外文期刊名：SOLID STATE SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000922116400001)】；

基金：This work was supported by the National Natural Science Foundation of China (22062003) , the Natural Science Foundation of Guizhou ( [2019] 2872 and [2020] 1Y037) , Guizhou Education Department Youth Science and Technology Talents Growth Project (QianJiaoHe KY [2021] 253) , Science and Technology Supporting Foundation of Liupanshui (52020-2018-01-04, H2020-003) , Natural Science Foundation of Guizhou Institute of Technology (XJGC20190902) , and the Guizhou Province Energy Chemical Conversion New Material Technology Innovation Team (No. Qian Ke He Ping Tai Ren Cai [2019] 5609) .

语种：英文

外文关键词：Coal fly ash; Microwave; Ultrasound; Silicon extraction; FAU Zeolite

摘要：Highly crystalline and pure Y (FAU) zeolite were synthesized from coal fly ash (CFA) using a combined in situ microwave and ultrasonic irradiation-assisted method, improving the extraction efficiency of silicon and aluminum from coal fly ash with limited energy usage relative to conventional microwave or ultrasound methods. Significant improvement in the combined method was evident following activation in 4 mol/L sodium hydroxide solution for 1 h at 100 degrees C whereby 39.80 wt% conversion of CFA was attained along with 70.26 mol.% conversion of Si and 68.03 mol.% conversion of Al. Solid-state 29Si and 27Al magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectra were used to investigate the framework chemical coordination environment, while the temperature-programmed desorption of NH3 (NH3-TPD) and pyridine-Fourier transform infrared (Pyridine-FTIR) spectra were employed to quantitatively detect the acidity and types of acid sites of the sample. The Si to Al ratio (SAR) of the as-obtained CFA-based Y zeolite was 4.65 with a specific surface area of 916.10 m2/g, leading towards excellent CO2 adsorption (107.14 cm3/g at 0 degrees C). Furthermore, the thermocatalytic performance of the CFA-Y sample was analyzed in the conversion of cumene, with high silica commercial ultra-stable Y (USY) zeolite as a reference.