CAJ | 학술논문

以仲钼酸铵（AHM）和硫粉为原料，利用热分解法制备了非负载型钼基催化剂，并考察了添加三种助剂对钼基催化剂耐硫甲烷化性能的影响。结果表明，添加Co助剂抑制了甲烷化反应活性，添加Zr、Al助剂既维持了催化剂原有活性又提高了催化剂的稳定性。进一步考察了不同Al2O3添加量对钼基催化剂反应性能的影响，发现m(Al2O3)/m(AHM)为0.2时所制备的钼基催化剂的稳定性最好。采用BET、XRD、TEM 技术对催化剂进行了表征，发现添加Al2O3可以提高MoS2的分散度，防止MoS2的聚集，这是导致催化剂稳定性提高的主要原因。
이중목산안（AHM）화류분위원료，이용열분해법제비료비부재형목기최화제，병고찰료첨가삼충조제대목기최화제내류갑완화성능적영향。결과표명，첨가Co조제억제료갑완화반응활성，첨가Zr、Al조제기유지료최화제원유활성우제고료최화제적은정성。진일보고찰료불동Al2O3첨가량대목기최화제반응성능적영향，발현m(Al2O3)/m(AHM)위0.2시소제비적목기최화제적은정성최호。채용BET、XRD、TEM 기술대최화제진행료표정，발현첨가Al2O3가이제고MoS2적분산도，방지MoS2적취집，저시도치최화제은정성제고적주요원인。
Unsupported Mo-based catalysts were prepared by thermal decomposition method using ammonium heptamolybdate (AHM) and sulfur powder as raw materials, and the effect of three additives on the performances of the Mo-based catalysts for sulfur-resistant methanation was studied. The results indicated that Co additive reduced the catalytic activity, and both of Zr and Al2O3 could not only keep the catalytic activity but also improve the stability. The investigation on effect of Al2O3 content on the stability of MoS2 catalysts showed that the most stable catalyst was that prepared by a Al2O3/AMH mass ratio of 0.2, and BET, XRD and TEM results revealed that the major reasons for increasing stability were that the addition of appropriate Al2O3 improved Mo dispersion and decreased sintering of MoS2.