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Ambient Pressure Hydrodesulfurization of Refractory Sulfur Compounds in Highly Sensitive μ-Reactor Platform Coupled to a Time-of-Flight Mass Spectrometer
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acs.jpcc.7b11089 Ann-Louise N. Christoffersen 1 , Anders Bodin 1 , Christian F. Elkjær 2 , Jakob E. Sørensen 1 , Jakob Kibsgaard 1 , Ib Chorkendorff 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acs.jpcc.7b11089 Ann-Louise N. Christoffersen 1 , Anders Bodin 1 , Christian F. Elkjær 2 , Jakob E. Sørensen 1 , Jakob Kibsgaard 1 , Ib Chorkendorff 1
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Tightened restrictions call for cleaner transportation fuels to minimize environmental and societal problems caused by the presence of sulfur in transportation fuels. This emphasizes the need for new and better catalysts in the field of hydrodesulfurization (HDS), which aims at removing the refractory sulfur from different petroleum streams mostly found in the form of the alkyl-substituted dibenzothiophenes (β-DBTs). In this work we demonstrate how a setup dedicated to testing minute amounts (nanogram) of well-defined catalytic systems in μ-reactors can be used in the gas-phase HDS of the model compounds DBT and 4,6-dimethyldibenzothiophene (4,6-DMDBT) and the reaction pathways revealed by time-of-flight mass spectrometry. Specifically, we investigate HDS of DBT and 4,6-DMDBT on mass-selected Pt nanoparticles and show that only the direct desulfurization products are formed. The setup is a means to bridge the gap between structural characterization of model catalysts and their related activity in the HDS of DBT and 4,6-DMDBT.
中文翻译：
联用飞行时间质谱仪在高灵敏度μ反应器平台中难降解含硫化合物的环境压力加氢脱硫
严格的限制要求使用更清洁的运输燃料，以最大程度地减少由运输燃料中存在的硫引起的环境和社会问题。这强调了在加氢脱硫（HDS）领域中对新型更好催化剂的需求，该催化剂旨在从大多数以烷基取代的二苯并噻吩（β-DBTs）形式存在的不同石油流中去除难熔硫。在这项工作中，我们演示了如何在模型化合物DBT和4,6-二甲基二苯并噻吩（4,6 -DMDBT）和飞行时间质谱揭示的反应途径。具体来说，我们调查DBT和4的HDS 质量选择的Pt纳米颗粒上的6-DMDBT，表明仅形成直接脱硫产物。该装置是弥合模型催化剂的结构表征与其在DBT和4,6-DMDBT的HDS中的相关活性之间的差距的一种方法。
更新日期：2018-01-17
中文翻译：
联用飞行时间质谱仪在高灵敏度μ反应器平台中难降解含硫化合物的环境压力加氢脱硫
严格的限制要求使用更清洁的运输燃料，以最大程度地减少由运输燃料中存在的硫引起的环境和社会问题。这强调了在加氢脱硫（HDS）领域中对新型更好催化剂的需求，该催化剂旨在从大多数以烷基取代的二苯并噻吩（β-DBTs）形式存在的不同石油流中去除难熔硫。在这项工作中，我们演示了如何在模型化合物DBT和4,6-二甲基二苯并噻吩（4,6 -DMDBT）和飞行时间质谱揭示的反应途径。具体来说，我们调查DBT和4的HDS 质量选择的Pt纳米颗粒上的6-DMDBT，表明仅形成直接脱硫产物。该装置是弥合模型催化剂的结构表征与其在DBT和4,6-DMDBT的HDS中的相关活性之间的差距的一种方法。
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