工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2015年
6期
419-423
,共5页
催化化学%高比表面积%纳米 MgO%液相沉淀法%模板法
催化化學%高比錶麵積%納米 MgO%液相沉澱法%模闆法
최화화학%고비표면적%납미 MgO%액상침정법%모판법
catalytic chemistry%high specific surface area%nanometer magnesium oxide%liquid phase precipitation method%template method
纳米 MgO 具有较稳定的化学性质，表面碱性较强，在催化领域应用广泛。提高纳米 MgO的比表面积，可以使其催化性能更为优良。常见的制备高比表面积纳米 MgO 的方法有固相法、液相法、气相法和外模板法。对4种方法进行详细介绍和比较，并对高比表面积纳米 MgO 在催化反应中表现出的优势进行评述。液相法工艺简便，生产成本较低，易实现工业化，是较常用的制备高比表面积纳米 MgO 的方法，且制得的样品粒度分布较均匀，晶型结构较为完整。高比表面积纳米MgO 具有较发达的孔道结构和较高的比表面积，在催化反应中可以提供更多的活性位，同时还可促进反应物和产物分子在催化剂内表面的扩散，提高反应活性，因此，在保持纳米 MgO 强碱性的前提下，高比表面积纳米 MgO 应用前景更为广阔。
納米 MgO 具有較穩定的化學性質，錶麵堿性較彊，在催化領域應用廣汎。提高納米 MgO的比錶麵積，可以使其催化性能更為優良。常見的製備高比錶麵積納米 MgO 的方法有固相法、液相法、氣相法和外模闆法。對4種方法進行詳細介紹和比較，併對高比錶麵積納米 MgO 在催化反應中錶現齣的優勢進行評述。液相法工藝簡便，生產成本較低，易實現工業化，是較常用的製備高比錶麵積納米 MgO 的方法，且製得的樣品粒度分佈較均勻，晶型結構較為完整。高比錶麵積納米MgO 具有較髮達的孔道結構和較高的比錶麵積，在催化反應中可以提供更多的活性位，同時還可促進反應物和產物分子在催化劑內錶麵的擴散，提高反應活性，因此，在保持納米 MgO 彊堿性的前提下，高比錶麵積納米 MgO 應用前景更為廣闊。
납미 MgO 구유교은정적화학성질，표면감성교강，재최화영역응용엄범。제고납미 MgO적비표면적，가이사기최화성능경위우량。상견적제비고비표면적납미 MgO 적방법유고상법、액상법、기상법화외모판법。대4충방법진행상세개소화비교，병대고비표면적납미 MgO 재최화반응중표현출적우세진행평술。액상법공예간편，생산성본교저，역실현공업화，시교상용적제비고비표면적납미 MgO 적방법，차제득적양품립도분포교균균，정형결구교위완정。고비표면적납미MgO 구유교발체적공도결구화교고적비표면적，재최화반응중가이제공경다적활성위，동시환가촉진반응물화산물분자재최화제내표면적확산，제고반응활성，인차，재보지납미 MgO 강감성적전제하，고비표면적납미 MgO 응용전경경위엄활。
Nanometer magnesium oxide is widely used in various catalytic reactions because of its strong surface alkaline and stable chemical property. It was found that catalytic activity of nanometer magnesium oxide was improved with the increase of its specific surface area. The preparation methods of MgO with high specific surface area included solid phase method,liquid phase method,vapor phase method and external-template method. The methods were introduced in detail and compared,and the superiority of high specific surface area nano-MgO in catalytic reactions was also reviewed. The liquid phase method was more commonly used to prepare high specific-surface-area nano-MgO,and had the advantages of simple process,low production cost and easy industrialization. In addition,the as-prepared nano-MgO possessed uniform particle size distribution and more complete crystal structure. High-specific-area nanometer MgO had abundant pore structure and higher specific surface area,so it could provide more active sites in catalytic reactions. Meanwhile,high-specific-area MgO could also promote the molecule diffusion of reactants and products within the catalyst internal surface and increase the reaction activity. Therefore,high specific surface area nano-MgO based on the premise of keeping its strong alkaline has wider application prospect.
