CAJ | 학술논문

采用旋转真空浸渍法和等体积浸渍法分别制备了NiO/MgO-γ-Al2 O3催化剂RVIC和WIC。N2吸附实验表明，RVIC催化剂具有更大的比表面积。XRD结果表明，RVIC和WIC中的镍物种存在方式均为尖晶石NiAl2 O4；TPR结果表明，两试样均在800℃处出现尖晶石NiAl2 O4的还原峰，且RVIC的还原峰面积比WIC的大13%。还原后的XRD结果表明，RVIC的Ni晶粒尺寸仅为5.8 nm，小于WIC的7.3 nm。H2-TPR结果显示，试样RVIC活性组分Ni 的分散度为0.491，大于WIC（0.116）。活性评价结果显示，RVIC的CH4与CO2最终转化率分别为98%与77%，远远高于WIC（ CH4与CO2最终转化率分别为55%和40%）。240 h寿命实验结果显示，RVIC的CH4转化率高达100%，CO2稳定转化率超过70%。
채용선전진공침지법화등체적침지법분별제비료NiO/MgO-γ-Al2 O3최화제RVIC화WIC。N2흡부실험표명，RVIC최화제구유경대적비표면적。XRD결과표명，RVIC화WIC중적얼물충존재방식균위첨정석NiAl2 O4；TPR결과표명，량시양균재800℃처출현첨정석NiAl2 O4적환원봉，차RVIC적환원봉면적비WIC적대13%。환원후적XRD결과표명，RVIC적Ni정립척촌부위5.8 nm，소우WIC적7.3 nm。H2-TPR결과현시，시양RVIC활성조분Ni 적분산도위0.491，대우WIC（0.116）。활성평개결과현시，RVIC적CH4여CO2최종전화솔분별위98%여77%，원원고우WIC（ CH4여CO2최종전화솔분별위55%화40%）。240 h수명실험결과현시，RVIC적CH4전화솔고체100%，CO2은정전화솔초과70%。
Two NiO/MgO-γ-Al2 O3 eatalysts( RVIC and WIC)were prepared by rotation vaeuum impreg-nation method and natural impregnation method. The N2 adsorption experiment showed that RVIC eatalyst has larger speeifie area. The result showed that the reduetion peak assigned to spinal NiAl2 O4 of RVIC and WIC eatalysts at 800 ℃ eould be got,and the reduetion peak area of RVIC was higher than that of WIC. The size of niekel of RVIC eatalyst was just 5. 8 nm,smaller than that of WIC(7. 3 nm). RVIC and WIC were 0. 491 and 0. 116 respeetively,whieh indieated that niekel dispersed well on RVIC. CO2 Refor-ming of CH4 evaluation experiment showed that the ending eonversions of CH4 and CO2 of RVIC were 98% and 77% respeetively,higher than that of WIC,whieh CH4 and CO2 eonversions were 55% and 40% respeetively. The 240 h life experiment indieated that the eonversion of CH4 of RVIC was about 100%,and the stable eonversion of CO2 was over 70%.