Quantitative analysis of complex mixtures containing hundreds-to-thousands of organic compounds rich in heteroatoms, including oxygen, sulfur, and nitrogen, is a major challenge in the fuel, food, and chemical industries. In this work, a two-stage (oxidation and methanation) catalytic process in a 3-D–printed metal microreactor was evaluated for its capability to convert sulfur-containing organic compounds to methane. The microreactor was inserted into a gas chromatograph between the capillary column and flame ionization detector. Catalytic conversion of all sulfur-containing analytes to methane enabled carbon quantification without calibration, by the method identified as “quantitative carbon detection” or QCD. Quantification of tetrahydrothiophene, dimethyl sulfoxide, diethyl sulfide, and thiophene indicated complete conversion to methane at 450°C. Long-term performance of a commercial microreactor was evaluated for 2000 consecutive injections of sulfur-containing organic analytes. The sulfur processing capacity of the microreactor was identified experimentally, after which reduced conversion to methane was observed. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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使用柱后反应和火焰电离检测对含硫混合物进行完整的碳分析

定量分析包含数十万种富含杂原子的有机化合物的复杂混合物，其中包括氧，硫和氮，是燃料，食品和化学工业的主要挑战。在这项工作中，评估了在3-D印刷的金属微反应器中进行两阶段（氧化和甲烷化）催化过程的能力，该过程将含硫有机化合物转化为甲烷。将微反应器插入毛细管柱和火焰电离检测器之间的气相色谱仪中。将所有含硫分析物催化转化为甲烷，无需校准即可进行碳定量，方法为“定量碳检测”或QCD。定量四氢噻吩，二甲基亚砜，二乙基硫，噻吩表明在450°C完全转化为甲烷。对于连续进样2000次的含硫有机分析物，评估了商用微反应器的长期性能。实验确定了微反应器的硫处理能力，此后观察到向甲烷的转化率降低。©2017美国化学工程师学会AIChE的Ĵ，2017年