| EFFECTS OF K_2O AND MnO PROMOTERS ON THE PRODUCTION OF LIGHT ALKENES VIA SYNGAS OVER Fe/SILICALITE-2 CATALYST I.ACTIVITY OF K-Fe-MnO/SILICALIT-2 CATALYST |
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| 作者姓名： | XU Long-Ya WANG Qing-Xia XU Yi-De HUANG Jia-ShengDalian Institute of Chemical Physics Academia SinicaDalian Liaoning State Key Laboratory of CatalysisDalian Institute of Chemical Physics. Academia SinicaDalian Liaoning To whom correspondence should be addressed. |
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| 作者单位： | XU Long-Ya WANG Qing-Xia XU Yi-De HUANG Jia-ShengDalian Institute of Chemical Physics，Academia SinicaDalian，Liaoning 116023State Key Laboratory of CatalysisDalian Institute of Chemical Physics. Academia SinicaDalian，Liaoning 116023 To whom correspondence should be addressed. |
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| 摘 要： | The activity and the selectivity to light alkenes of silicalite-2 (Si-2) zeolite supported F'e catalyst tor CO hydrogenation can he improved obviously with the addition of K2O and MnO promoters. The results of CO hydrogenation, CO-TPD, CO/H2-TPSR, C2H4/H2-TPSR and C2H4/H2 pulse reaction over K-Fe-MnO/Si-2 catalysts clearly show that the K2O additive into Fe-MnO/Si-2 catalyst leads to a remarkable increase in both the capacity and strength of the strong CO ad-species that will produce much more |Cad| via their disproportionation at higher temperatures. This results in an increase in the CO conversion and the selectivity to light olefins, and a decrease in CH4 formation. Moreover, K2O can suppress the disproportionate of C2H4 that occurs during the reaction as a side-reaction Meanwhile, the MnO promoter mainly prohibits the hydrogenation of C2H4 and C3H6, which is favorable to enhancing the selectivity to C2H4 and C3H6 and decreasing the formation of C2H6, and C3H8. It is also of interest that MnO has har
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EFFECTS OF K2O AND MnO PROMOTERS ON THE PRODUCTION OF LIGHT ALKENES VIA SYNGAS OVER Fe/SILICALITE-2 CATALYST I. ACTIVITY OF K-FeMnO/SILICALIT-2 CATALYST |
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| XU Long-Ya WANG Qing-Xia XU Yi-De HUANG Jia-ShengDalian Institute of Chemical Physics,Academia SinicaDalian,Liaoning State Key Laboratory of CatalysisDalian Institute of Chemical Physics. Academia SinicaDalian,Liaoning To whom correspondence should be addressed..EFFECTS OF K_2O AND MnO PROMOTERS ON THE PRODUCTION OF LIGHT ALKENES VIA SYNGAS OVER Fe/SILICALITE-2 CATALYST I.ACTIVITY OF K-Fe-MnO/SILICALIT-2 CATALYST[J].Journal of Natural Gas Chemistry,1995(3). |
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| Authors: | XU Long-Ya WANG Qing-Xia XU Yi-De HUANG Jia-ShengDalian Institute of Chemical Physics Academia SinicaDalian Liaoning State Key Laboratory of CatalysisDalian Institute of Chemical Physics Academia SinicaDalian Liaoning To whom correspondence should be addressed |
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| Institution: | XU Long-Ya WANG Qing-Xia XU Yi-De HUANG Jia-ShengDalian Institute of Chemical Physics,Academia SinicaDalian,Liaoning 116023State Key Laboratory of CatalysisDalian Institute of Chemical Physics. Academia SinicaDalian,Liaoning 116023 To whom correspondence should be addressed. |
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| Abstract: | The activity and the selectivity to light alkenes of silicalite-2 (Si-2) zeolite supported F'e catalyst tor CO hydrogenation can he improved obviously with the addition of K2O and MnO promoters. The results of CO hydrogenation, CO-TPD, CO/H2-TPSR, C2H4/H2-TPSR and C2H4/H2 pulse reaction over K-Fe-MnO/Si-2 catalysts clearly show that the K2O additive into Fe-MnO/Si-2 catalyst leads to a remarkable increase in both the capacity and strength of the strong CO ad-species that will produce much more |Cad| via their disproportionation at higher temperatures. This results in an increase in the CO conversion and the selectivity to light olefins, and a decrease in CH4 formation. Moreover, K2O can suppress the disproportionate of C2H4 that occurs during the reaction as a side-reaction Meanwhile, the MnO promoter mainly prohibits the hydrogenation of C2H4 and C3H6, which is favorable to enhancing the selectivity to C2H4 and C3H6 and decreasing the formation of C2H6, and C3H8. It is also of interest that MnO has hardly effect on the yield of CH4. Generally, both K2O and MnO are vital to the selective production of light alkenes from syngas over Fe/Si-2 catalyst. |
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| Keywords: | Fe-MnO catalyst silicaiite-2 light alkcnes carbon monoxide |
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