摘要
采用常压、低温的亚熔盐方法活化燃煤电厂粉煤灰,使粉煤灰中稳定性高、化学活性低的硅、铝物种转化为高化学活性的无定形硅、铝,以活化粉煤灰为原料合成磷酸硅铝分子筛SAPO-11。使用ICP-OES测定了活化粉煤灰中活性硅、铝的含量,采用XRD和SEM表征了分子筛样品的物相和形貌。实验结果表明,亚熔盐活化方法能够较好地将粉煤灰中的硅、铝物种活化为高化学活性的无定型硅、铝,使用亚熔盐活化后的粉煤灰能够成功合成SAPO-11分子筛。该研究可为粉煤灰合成分子筛提供绿色、高效的活化方法,对煤系固体废物粉煤灰的高值资源化利用具有一定的理论价值和指导意义。
The fly ash from the coal-fired power plant was activated by atmospheric pressure and low temperature sub-molten salt method.The silicon and aluminum species with high stability and low chemical activity in fly ash were transformed into amorphous silicon and aluminum with high chemical activity.The activated fly ash was used as raw materials to synthesize aluminosilicate molecular sieve SAPO-11.The content of active silicon and aluminum in activated fly ash was determined by ICP-OES.The phase and morphology of molecular sieve samples were characterized by XRD and SEM.The test results show that the sub-molten salt activation method can better activate the silicon and aluminum species in fly ash to amorphous silicon and aluminum with high chemical activity.The fly ash activated by sub-molten salt can successfully synthesize SAPO-11 molecular sieve.This study can provide a green and efficient activation method for the synthesis of molecular sieves from fly ash,which has certain theoretical value and guiding significance for the high-value resource utilization of coal-based solid waste fly ash.
作者
陈治平
李昕玥
刘力
赵文杰
吕世豪
周文武
贺新福
周安宁
CHEN Zhiping;LI Xinyue;LIU Li;ZHAO Wenjie;LYU Shihao;ZHOU Wenwu;HE Xinfu;ZHOU Anning(School of Chemistry and Chemical Engineering,Xi’an University of Science and Technology,Xi’an,Shaanxi 710054,China;State Key Laboratory of Green and Safe Coal Development in Western China,Xi’an,Shaanxi 710054,China)
出处
《矿产综合利用》
2025年第6期186-191,共6页
Multipurpose Utilization of Mineral Resources
基金
国家自然科学基金(22178283)
陕西省自然科学基础研究计划项目(2020JM-517)
2022年陕西省大学生创新创业训练计划项目(S202210704082)。
关键词
粉煤灰
亚熔盐活化
分子筛
硅
铝
fly ash
sub-molten salt activation
molecular sieve
silicon
aluminum
