以钠基蒙脱土为原料, 利用模板导向技术在其层间组装多孔纳米SiO2颗粒, 并浸渍负载过渡金属氧化物纳米颗粒制得汽油脱硫剂. 通过XRD、TG、TEM、FT-IR和孔结构分析等手段表征了合成的多孔材料的结构和性能. 汽油吸附脱硫实验结果表明, 经纳米材料组装改性的蒙脱土具有择形吸附的特性, 对汽油中的含硫化合物的脱除率相比钠基蒙脱土提高了52%. 过渡金属氧化物纳米颗粒改性补强SiO2柱撑蒙脱土的热稳定性有显著提高.
Montmorillonite (MMT) is a natural layer-layer material. The template-directed method was used to assemble the nano-SiO2-particles within the layers of MMT. And a desulfurizer for gasoline was developed through loading the transition metal oxide on Si/MMT. The modified montmorillonite was characterized by XRD, TG, TEM, FT-IR and N2 adsorption-desorption. The results of gasoline desulfurization show that nano-particle assembled montmorillonite is an excellent selective adsorbent and its desulfurization ratio is increased by 52% than Na-MMT. The SiO2 pillared montmorillonite modified with rare earth oxides and transition metal oxides nano-particles shows an excellent heat-stability.
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