Catalytic Oxidative Desulfurization of Diesel Fuels Using Air in a Two-Step Approach
Catalytic Oxidative Desulfurization of Diesel Fuels Using Air in a Two-Step Approach
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DOI：
10.1021/ie403445f
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发表时间：
2014-01
影响因子：
4.2
通讯作者：
Ramanathan Sundararaman;C. Song
中科院分区：
文献类型：
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作者：
Ramanathan Sundararaman;C. Song
本研究提出了一种新的燃料脱硫的两个步骤，其中使用空气作为氧化剂，用于从柴油中的芳烃原位生成氢过氧化物，然后硫化合物被氢过氧化物氧化成砜。考察了本体和负载型CuO基催化剂用于使用空气原位氧化替代和真实的柴油燃料以生成氢过氧化物。在CuO、CuO/Al_2O_3、CuO/SiO_2、CuO/TiO_2和CuO-ZnO/Al_2O_3催化剂中，CuO/Al_2O_3催化剂的转化率最高，但在CuO催化剂上，异丙苯液相空气氧化的过氧化氢收率和选择性最高。H2-程序升温还原（H2-TPR）揭示了分散的CuO相的存在下，负载型催化剂与本体CuO作为主导相的非负载型催化剂。在本体CuO催化剂的存在下，在120 °C下测试三种真实的柴油燃料的液相空气氧化，其显示不同水平的氢过氧化物产生。这...
This study presents a novel approach to fuel desulfurization in two steps where air is used as oxidant for the in situ generation of hydroperoxides from aromatics in diesel fuel and then the sulfur compounds are oxidized by the hydroperoxides to sulfones. Bulk and supported CuO based catalysts were examined for oxidation of surrogate and real diesel fuels for generation of hydroperoxides in situ using air. Among bulk CuO, CuO/Al2O3, CuO/SiO2, CuO/TiO2, and CuO-ZnO/Al2O3 tested, CuO/Al2O3 gave the highest conversion, but the highest yield and selectivity for hydroperoxide was obtained on bulk CuO catalyst for liquid phase air oxidation of isopropylbenzene. H2-Temperature programmed reduction (H2-TPR) revealed the presence of dispersed CuO phase on supported catalysts with bulk CuO as the dominant phase on the unsupported catalyst. Three real diesel fuels were tested for liquid phase air oxidation at 120 °C in the presence of bulk CuO catalyst which revealed different levels of hydroperoxides generation. Th...