本文選題：雙金屬催化劑 + 模型化合物�。� 參考：《化工學(xué)報》2017年10期

【摘要】：以Al_2O_3為載體,Ce、Co和Fe為助劑,采用機械化學(xué)法制備了4種鎳基催化劑,對其進行了XRD、H_2-TPR、BET、NH_3-TPD等表征。當(dāng)載氣流量為50 ml·min~(-1),裂解溫度為750℃時,在固定床反應(yīng)器中考察了各催化劑對煤焦油模型化合物甲苯+芘裂解行為的影響。結(jié)果表明:4種催化劑均為介孔催化劑,且雙金屬催化劑的介孔有序度更高;催化劑中活性組分Ni主要以尖晶石NiAl_2O_4的形式存在;添加Fe助劑后,催化劑的酸強度較Ni/Al_2O_3增加,添加Ce和Co時則相反。評價實驗表明,助劑對重質(zhì)組分芘的裂解率影響較小,約為67%,然而Ce和Co對催化劑的抗積炭性能有利,其析碳分別較無助劑時降低28.8%和18.0%。
[Abstract]:Four kinds of nickel based catalysts were prepared by mechanochemical method using Al_2O_3 as carrier CeCe Co and Fe as auxiliaries. The catalysts were characterized by XRDX H2-TPRB et al. When the carrier gas flow rate was 50ml / min ~ (-1) and the pyrolysis temperature was 750 鈩，

本文編號：1854887