Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process
The selective hydrogenation process is industrially used to remove trace acetylene from ethylene-rich streams. In this work, N-methyl-2-pyrrolidone (NMP) was introduced as a liquid phase to the front-end hydrogenation process, with using Pd/SiO2 as a model catalyst, to improve the selectivity to eth...
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Tsinghua University Press
2025-06-01
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| Series: | Carbon Future |
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| Online Access: | https://www.sciopen.com/article/10.26599/CF.2025.9200043 |
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| author | Zhenyu Kang Xiaocheng Lan Tiefeng Wang |
| author_facet | Zhenyu Kang Xiaocheng Lan Tiefeng Wang |
| author_sort | Zhenyu Kang |
| collection | DOAJ |
| description | The selective hydrogenation process is industrially used to remove trace acetylene from ethylene-rich streams. In this work, N-methyl-2-pyrrolidone (NMP) was introduced as a liquid phase to the front-end hydrogenation process, with using Pd/SiO2 as a model catalyst, to improve the selectivity to ethylene. In the liquid-phase hydrogenation, a high ethylene selectivity of ~ 80% was obtained at an acetylene conversion of 99.69% by using two reactors in series. In contrast, the ethylene selectivity was only ~ 40% in the gas phase at a similar acetylene conversion of 99.76%. The superiority of the liquid-phase hydrogenation was attributed to the extremely low ratios of C2H4/C2H2 (β) and H2/C2H2 (γ) and low concentration of C2H4 in NMP. In addition, the liquid phase can prevent ethylene loss even at higher reaction temperatures. Catalyst stability in the liquid-phase hydrogenation was studied to identify optimal operating conditions. Lower acetylene concentration and higher hydrogen concentration, which can be adjusted by varying temperature and pressure, were found to favor catalyst stability. |
| format | Article |
| id | doaj-art-e7644bf56743481b95b92d1525c6d88c |
| institution | Kabale University |
| issn | 2960-0561 2960-0421 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Tsinghua University Press |
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| series | Carbon Future |
| spelling | doaj-art-e7644bf56743481b95b92d1525c6d88c2025-08-20T03:30:19ZengTsinghua University PressCarbon Future2960-05612960-04212025-06-0122920004310.26599/CF.2025.9200043Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end processZhenyu Kang0Xiaocheng Lan1Tiefeng Wang2Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaOrdos Laboratory, Ordos 017010, ChinaOrdos Laboratory, Ordos 017010, ChinaThe selective hydrogenation process is industrially used to remove trace acetylene from ethylene-rich streams. In this work, N-methyl-2-pyrrolidone (NMP) was introduced as a liquid phase to the front-end hydrogenation process, with using Pd/SiO2 as a model catalyst, to improve the selectivity to ethylene. In the liquid-phase hydrogenation, a high ethylene selectivity of ~ 80% was obtained at an acetylene conversion of 99.69% by using two reactors in series. In contrast, the ethylene selectivity was only ~ 40% in the gas phase at a similar acetylene conversion of 99.76%. The superiority of the liquid-phase hydrogenation was attributed to the extremely low ratios of C2H4/C2H2 (β) and H2/C2H2 (γ) and low concentration of C2H4 in NMP. In addition, the liquid phase can prevent ethylene loss even at higher reaction temperatures. Catalyst stability in the liquid-phase hydrogenation was studied to identify optimal operating conditions. Lower acetylene concentration and higher hydrogen concentration, which can be adjusted by varying temperature and pressure, were found to favor catalyst stability.https://www.sciopen.com/article/10.26599/CF.2025.9200043selective hydrogenationethylene purificationfront-endliquid phasecatalyst stability |
| spellingShingle | Zhenyu Kang Xiaocheng Lan Tiefeng Wang Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process Carbon Future selective hydrogenation ethylene purification front-end liquid phase catalyst stability |
| title | Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process |
| title_full | Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process |
| title_fullStr | Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process |
| title_full_unstemmed | Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process |
| title_short | Liquid-phase selective hydrogenation of acetylene with the feed composition of front-end process |
| title_sort | liquid phase selective hydrogenation of acetylene with the feed composition of front end process |
| topic | selective hydrogenation ethylene purification front-end liquid phase catalyst stability |
| url | https://www.sciopen.com/article/10.26599/CF.2025.9200043 |
| work_keys_str_mv | AT zhenyukang liquidphaseselectivehydrogenationofacetylenewiththefeedcompositionoffrontendprocess AT xiaochenglan liquidphaseselectivehydrogenationofacetylenewiththefeedcompositionoffrontendprocess AT tiefengwang liquidphaseselectivehydrogenationofacetylenewiththefeedcompositionoffrontendprocess |