Reaction processes of decomposition and partial oxidation of a mixture of acid gas (HS and CO) and methane (CH) could enable the efficient production of valuable syngas resource (H and CO). In this work, the decomposition and partial oxidation of HS–CH–CO system was experimentally studied in a tube furnace. Effects of temperature, CH and CO addition, equivalence ratio and residence time were studied for syngas production and H/CO variation. Extended temperature and pressure were then studied by equilibrium calculation for thermodynamic analysis in Aspen Plus software. The results showed the increasing temperature favored reactant conversion and syngas production. HS decomposition was the dominant reaction at temperature below 1050 °C while threshold temperature for CH conversion over HS was about 1100 °C. H was formed mainly via HS decomposition at low temperatures. CH addition promoted H formation and conversely restrained HS conversion. The introduction of O brought partial oxidation, favored the reaction rate, balanced H/CO but reduced syngas production. H/CO ratio also remained at an appropriate level at high CO addition since CO evidently adjusted the ratio via CO+H↔CO + HO. However, this CO reactivity was only adequately expressed under high temperature and extended residence time. Equilibrium calculation confirmed experimental variation trends and revealed reducing pressure favored the syngas production. It could be inferred that extended residence time, higher temperature, suitable equivalence ratio, CH and CO addition and low pressure could enable improvement in both syngas production and H/CO. This study revealed high syngas production and adjustment of H/CO could be realized in HS–CH–CO system and this might be of great practical in industry.

中文翻译：

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混合酸性气体和甲烷的分解和部分氧化用于合成气生产的研究

酸性气体（H2S和CO）和甲烷（CH）混合物的分解和部分氧化反应过程可以有效生产有价值的合成气资源（H和CO）。本工作在管式炉中对 HS-CH-CO 体系的分解和部分氧化进行了实验研究。研究了温度、CH 和 CO 添加量、当量比和停留时间对合成气产量和 H/CO 变化的影响。然后通过 Aspen Plus 软件中热力学分析的平衡计算来研究扩展温度和压力。结果表明，升高温度有利于反应物转化和合成气生产。 H2S 分解是温度低于 1050 °C 时的主要反应，而 H2S 转化 CH 的阈值温度约为 1100 °C。 H主要通过HS在低温下分解形成。 CH的添加促进了H的形成，相反抑制了H2S的转化。 O的引入带来了部分氧化，有利于反应速率，平衡了H/CO，但减少了合成气产量。在高 CO 添加量下，H/CO 比率也保持在适当的水平，因为 CO 明显通过 CO+H↔CO + H2O 调整了比率。然而，这种CO反应性只有在高温和延长停留时间的情况下才能充分表达。平衡计算证实了实验变化趋势，并揭示了减压有利于合成气的生产。可以推断，延长停留时间、较高温度、合适的当量比、CH和CO添加以及低压可以提高合成气产量和H/CO。该研究表明HS-CH-CO系统可以实现高合成气产量和H/CO调节，这在工业上可能具有很大的实用性。