柴油氧化脱硫的半孔SnO2-MoO3催化剂:SnO2/MoO3比率对催化效率的影响
Fina J Lesafi1, Tatiana Pogrebnaya1, Cecil K King'ondu2
1Department of Materials Science and Engineering (MaSE), School of Materials, Energy, Water and Environmental Sciences (MEWES), Nelson Mandela African Institution of Science and Technology, P.O Box 447, Arusha, Tanzania.
Heliyon
|September 1, 2023
概括
开发新的SnO2 - MoO3催化剂有效地通过氧化脱硫 (ODS) 从柴油中去除硫. 该Sn/Mo (2:1) 比率催化剂实现了99.8%的二二二烯去除,显示了工业应用的巨大潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 环境科学 环境科学
背景情况:
- 车辆的硫氧化物 (SOx) 排放对公众健康,催化转换器和环境构成重大风险.
- 从柴油中去除硫的有效策略对于减轻这些不利影响至关重要.
研究的目的:
- 合成和评估用于柴油氧化脱硫 (ODS) 的SnO2-MoO3混合氧化物催化剂.
- 调查SnO2/MoO3摩尔比对催化性能的影响.
主要方法:
- SnO2-MoO3混合氧化物和单氧化物使用软模板方法制备,并在450°C时化.
- 催化效率在模型柴油ODS中进行了测试,催化剂的特点是XRD,拉曼光谱,SEM,N2-物理吸收和酸位.
主要成果:
- 与纯SnO2相比,混合SnO2和MoO3增强了酸性部位,结晶性,氧空缺和表面积.
- Sn/Mo (2:1) 催化剂实现了最高的二二二烯氧化效率 (30分钟内99.8%),速度常数为0.057分钟-1.
- 催化剂性能与Sn含量呈正相关性,比纯MoO3和SnO2显著提高活性.
结论:
- SnO2-MoO3混合氧化物,特别是具有2:1 Sn/Mo比率的氧化物,对柴油ODS表现出优越的催化活性.
- 增强的性能,包括增加的酸度和氧气空缺,有助于高脱硫效率.
- 这些催化剂对于实际的工业脱硫应用具有很大的潜力.
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