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کاتالیزور کاربردی a: عمومی 2012
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • studies on stability and coking resistance of ni/batio3–al2o3 catalysts for lower temperature dry reforming of methane (ltdrm)

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1052
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    • شماره تماس دبیرخانه رویداد: -
     wt.%batio3–al2o3 (wt.%batio3 = 0–100%) composite supports were synthesized through varying the batio3 content by the “sol–(xero)gel” method. ni/wt.%batio3–al2o3 nickel-based catalysts prepared by incipient wetness method were evaluated for dry reforming of methane carried out between 690 °c and 800 °c. characterizations using xrd, ir, n2 adsorption–desorption, h2-tpr, sem, and xps were conducted to investigate the structure or properties of the wt.%batio3–al2o3 composite supports as well as the ni/wt.%batio3–al2o3 catalysts. the results demonstrate that batio3 particles are discontinuously dispersed on the surface of γ-al2o3 in the form of individual isolated particles for the wt.%batio3–al2o3composite supports. meanwhile, it is probably that the coexistence of baal2o4 spinel phase with the batio3phase on the surface of γ-al2o3 inhibits the ni/wt.%batio3–al2o3 catalysts from the formation of nial2o4spinel phase, improving the catalytic performance of the catalysts. the ni/batio3 catalyst showed poor stability and severe coke formation in the dry reforming of methane tested at 690 °c, which was thought to be mainly originated from the excessive strong electronic donor intensity of ni/batio3 catalyst as well as the resulted co disproportionation reaction. compared with the ni/batio3 catalyst, the ni/wt.%batio3–al2o3catalysts with the addition of batio3 had a higher dispersion of active nickel and a weakened electronic donor intensity of the niox species. as a result, the synthesized ni/32.4%batio3–al2o3 catalyst exhibited a high catalytic activity, excellent stability as well as coking resistance for lower temperature dry reforming of methane.

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