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Stability of CO2/N2 foam generated in CaCO3 nanoparticle/CTAB aqueous dispersion
Chemical Engineering Science ( IF 4.1 ) Pub Date : 2023-12-15 , DOI: 10.1016/j.ces.2023.119643
Ahmed G. Mehairi , Rahil Khoshnazar , Maen M. Husein

In an attempt to design a thermally stable foam with carbon sink attributes, the foamability and stability of aqueous foams generated from dispersions of CaCO3 nanoparticles (NPs) and hexadecyltrimethylammonium bromide (CTAB) are investigated. Much higher foam stability is reported here relative to literature. When compared to CTAB alone, the addition of CaCO3 NPs increases foam half-life from 5–7 min to 5–6 h in the presence of pure N2 and a gas mixture of CO2 and N2, respectively. Although there is no evidence of CTAB adsorption onto the NPs, the presence of CTAB is crucial to create the initial foam structure that is later stabilized by a network of NPs. Relative to CTAB alone, CaCO3 NPs/CTAB foam displays a higher bubble density and an average bubble size reduction of 67 %. In addition, CaCO3 NPs/CTAB foam is 20-fold more stable at 80 °C.



中文翻译:

CaCO3纳米颗粒/CTAB水分散体中产生的CO2/N2泡沫的稳定性

为了设计具有碳汇属性的热稳定泡沫,研究了由 CaCO 3纳米颗粒 (NP) 和十六烷基三甲基溴化铵 (CTAB) 分散体产生的水性泡沫的发泡性和稳定性。相对于文献,这里报道了更高的泡沫稳定性。与单独的 CTAB 相比,在纯 N 2以及 CO 2和 N 2的气体混合物存在下,添加 CaCO 3 NP 分别将泡沫半衰期从 5–7 分钟延长至 5–6 小时。尽管没有证据表明 CTAB 吸附在纳米颗粒上,但 CTAB 的存在对于创建初始泡沫结构至关重要,该泡沫结构随后通过纳米颗粒网络稳定。相对于单独的 CTAB,CaCO 3 NPs/CTAB 泡沫显示出更高的气泡密度,平均气泡尺寸减少了 67%。此外,CaCO 3 NPs/CTAB 泡沫在 80 °C 下的稳定性提高了 20 倍。

更新日期:2023-12-15
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