CAJ | 학술논문

系统地研究了还原剂(氯化铵)添加到丙烷选择氧化合成丙烯酸催化剂Mo-V-Te-Nb-O混合氧化物中对催化剂性能的影响.实验结果表明,在制备过程中还原剂的存在明显地影响了所得催化剂晶格氧的活动性,而晶格氧的活动性对Mo-V-Te-Nb-O混合氧化物的催化活性有重要的影响.进一步的研究表明,添加还原剂引起了催化剂形貌和相组成的变化,这些对于丙烯酸的形成有着重要作用.具有较多M1相含量的催化剂在低温(<653 K)时表现出了高丙烯酸选择性,而具有较多M2相含量的催化剂则在高温(>653 K)时更有利于丙烯酸的生成.
계통지연구료환원제(록화안)첨가도병완선택양화합성병희산최화제Mo-V-Te-Nb-O혼합양화물중대최화제성능적영향.실험결과표명,재제비과정중환원제적존재명현지영향료소득최화제정격양적활동성,이정격양적활동성대Mo-V-Te-Nb-O혼합양화물적최화활성유중요적영향.진일보적연구표명,첨가환원제인기료최화제형모화상조성적변화,저사대우병희산적형성유착중요작용.구유교다M1상함량적최화제재저온(<653 K)시표현출료고병희산선택성,이구유교다M2상함량적최화제칙재고온(>653 K)시경유리우병희산적생성.
The effects of the addition of the reductant (ammonium chloride) on Mo-V-Te-Nb-O mixed oxide catalysts for propane selective oxidation to acrylic acid were systematically investigated.The presence of the reductant during catalyst preparation had a significant impact on the mobility of lattice oxygen mainly responsible for the catalytic activity of the Mo-V-Te-Nb-O catalysts.Furthermore,the addition of the reductant resulted in clear changes in catalyst morphology and phase composition,which are important fac-tors in the formation of acrylic acid.A high content of the orthorhombic M1 phase led to a high selectivity to acrylic acid at low temperatures (<653 K),while a high content of the hexagonal M2 phase promoted the formation of acrylic acid at high temperatures(>653 K).