脱铝粉煤灰水热法合成1.1nm铝代托贝莫来石（英文）
发布时间：2018-11-10 17:22
【摘要】：以H_2SO_4、(NH_4)_2SO_4为焙烧助剂对粉煤灰进行焙烧-水浸处理,提取粉煤灰中Al组分,其剩余的残渣作为一种二次废弃物保留了大量的非晶态SiO_2组元,以提取铝组分后富含非晶态SiO_2的残渣为原料,首先在Ca、Si摩尔比为0.5、0.67、0.83、1.00、1.16条件下调配CaO Al_2O_3 SiO_2 H_2O体系凝胶,在探索最佳水热条件制备出铝代托贝莫来石的同时深入研究其形成机制,并对合成的系列1.1 nm铝代托贝莫来石粉体进行表征。结果表明:在水热反应环境(180℃,24 h)下,凝胶不断晶化,随着体系温度升高至240℃,在形成的莫来石晶体结构当中发生了Al对Si的同型取代,伴随着反应温度继续升高,1.1 nm铝代托贝莫来石可进一步转化为加藤石。
[Abstract]:H2SO4, (NH_4) _ 2SO_4 was used as roasting assistant to treat fly ash with roasting and water leaching, and the remaining residue of Al was extracted from fly ash. As a kind of secondary waste, a large number of amorphous SiO_2 components were retained. Using the residue rich in amorphous SiO_2 after the extraction of aluminum components as raw material, the CaO Al_2O_3 SiO_2 H2O system gels were prepared under the condition of Ca,Si molar ratio of 0.5 ~ 0.67 ~ 0.87 ~ 0.83 ~ 1.00 ~ (-1. 16) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1), respectively. The formation mechanism of aluminotobe mullite was studied while exploring the optimum hydrothermal conditions, and a series of 1. 1 nm Al substituted tobe mullite powders were characterized. The results show that in the hydrothermal reaction environment (180 鈩，
本文编号：2323088
[Abstract]:H2SO4, (NH_4) _ 2SO_4 was used as roasting assistant to treat fly ash with roasting and water leaching, and the remaining residue of Al was extracted from fly ash. As a kind of secondary waste, a large number of amorphous SiO_2 components were retained. Using the residue rich in amorphous SiO_2 after the extraction of aluminum components as raw material, the CaO Al_2O_3 SiO_2 H2O system gels were prepared under the condition of Ca,Si molar ratio of 0.5 ~ 0.67 ~ 0.87 ~ 0.83 ~ 1.00 ~ (-1. 16) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1), respectively. The formation mechanism of aluminotobe mullite was studied while exploring the optimum hydrothermal conditions, and a series of 1. 1 nm Al substituted tobe mullite powders were characterized. The results show that in the hydrothermal reaction environment (180 鈩，
本文编号：2323088
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