CAJ | 학술논문

研究了焙烧温度对 Ni/γ-Al2 O3还原条件及催化甲苯水蒸气重整反应的影响。结果表明，焙烧温度对催化剂的还原条件及性能具有重要影响。700℃焙烧的催化剂在680℃的反应温度下表现出良好的反应性能，在不进行预还原的情况下仍保持了很高的催化活性及稳定性，其中，甲苯转化率达99%。并使用 BET、XRD、TG-DTG 等表征方法对反应前后的催化剂进行表征，随着焙烧温度的升高，催化剂比表面积降低、总孔容减小、平均孔径增大、镍与载体的结合程度逐渐增强、NiAl2 O4含量逐渐增多，这是焙烧温度影响催化剂还原条件的主要原因。最后通过 TEM、XPS 对700℃焙烧的催化剂的结构进行了进一步的分析。
연구료배소온도대 Ni/γ-Al2 O3환원조건급최화갑분수증기중정반응적영향。결과표명，배소온도대최화제적환원조건급성능구유중요영향。700℃배소적최화제재680℃적반응온도하표현출량호적반응성능，재불진행예환원적정황하잉보지료흔고적최화활성급은정성，기중，갑분전화솔체99%。병사용 BET、XRD、TG-DTG 등표정방법대반응전후적최화제진행표정，수착배소온도적승고，최화제비표면적강저、총공용감소、평균공경증대、얼여재체적결합정도축점증강、NiAl2 O4함량축점증다，저시배소온도영향최화제환원조건적주요원인。최후통과 TEM、XPS 대700℃배소적최화제적결구진행료진일보적분석。
The influence of calcination temperature on Ni/ γ-Al2 O3 reducing conditions and catalytic steamreforming of toluene was studied. The results indicate that the catalyst calcined at 700 ℃ showed good catalytic performance at reaction temperature of 680 ℃ and maintained a high catalytic activity, stability without pre-reduction and 99% of toluene conversion was obtained under optimum conditions. The catalysts were also characterized by BET, XRD, TG-DTG and other techniques before and after reaction. As the calcinationtemperature was raised , the interaction between nickel and carrier was gradually enhanced, surface area and total pore volume decreased, and amount of NiAl2 O4 in the catalyst increased. These are considered the main reasonsfor the effect of calcination temperature on the catalyst reduction conditions. Finally , the structure of the catalyst calcined at 700 ℃ is further analyzed using TEM, XPS.