Pérez-Casas Jesús A, Zaldívar-Cadena Antonio A, Álvarez-Mendez Anabel, Ruiz-Valdés Juan Jacobo, Parra-Arciniega Salomé M de la, López-Pérez David C, Sánchez-Vázquez Astrid I
Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Avenida Universidad s/n, San Nicolás de los Garza 66455, Mexico.
Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Avenida Universidad s/n, San Nicolás de los Garza 66455, Mexico.
Materials (Basel). 2023 Sep 21;16(18):6327. doi: 10.3390/ma16186327.
To reduce the environmental impacts from sodium silicate synthesis, a ceramic method was suggested, with sugarcane bagasse ash (SCBA) as the source of silicon dioxide and sodium carbonate. Although the production of sodium silicate is carried out on a large scale, it should be noted that its process requires temperatures above 1000 °C; it also requires the use of highly corrosive agents such as sodium hydroxide and chlorine gas to neutralize the remaining sodium hydroxide. In the present study, the synthesis temperatures were reduced to 800 °C with a reaction time of 3 h by pressing equimolar mixtures of previously purified SCBA and sodium carbonate; then, heat treatment was carried out under the indicated conditions. The resulting materials were analyzed with Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Among the crystalline phases, calcium disodium silicate was identified, in addition to sodium silicate; thus, it was inferred that the other components of the ash can interfere with the synthesis of silicate. Therefore, in order to obtain the highest composition of sodium silicate, a leaching treatment of the SCBA is required.
为了减少硅酸钠合成对环境的影响，有人提出了一种陶瓷法，以甘蔗渣灰（SCBA）作为二氧化硅和碳酸钠的来源。尽管硅酸钠的生产规模很大，但应该注意的是，其生产过程需要1000℃以上的温度；还需要使用高腐蚀性试剂，如氢氧化钠和氯气来中和剩余的氢氧化钠。在本研究中，通过压制先前纯化的SCBA和碳酸钠的等摩尔混合物，将合成温度降低到800℃，反应时间为3小时；然后，在指定条件下进行热处理。使用傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）对所得材料进行分析。在结晶相中，除了硅酸钠外，还鉴定出了二硅酸钠钙；因此，推断灰分中的其他成分会干扰硅酸盐的合成。因此，为了获得最高含量的硅酸钠，需要对SCBA进行浸出处理。
