工业催化
工業催化
공업최화
INDUSTRIAL CATALYSIS
2015年
5期
344-348
,共5页
马志强%张洪喜%李海涛%武瑞芳%王俊俊%郭江渊%王志鹏%赵永祥
馬誌彊%張洪喜%李海濤%武瑞芳%王俊俊%郭江淵%王誌鵬%趙永祥
마지강%장홍희%리해도%무서방%왕준준%곽강연%왕지붕%조영상
催化化学%CuO-Bi2O3%甲醛乙炔化%1,4-丁炔二醇%核壳结构
催化化學%CuO-Bi2O3%甲醛乙炔化%1,4-丁炔二醇%覈殼結構
최화화학%CuO-Bi2O3%갑철을결화%1,4-정결이순%핵각결구
catalytic chemistry%CuO-Bi2 O3%formaldehyde ethynylation%1,4-butynediol%core-shell structure
为了提高铜铋炔化催化剂的稳定性、抑制活性组分流失造成的活性下降和延长催化剂使用寿命，采用共沉淀法制备 CuO -Bi2 O3粉体，并使用溶胶-凝胶法对其进行包覆制备核壳结构CuO-Bi2 O3@meso-SiO2催化剂，利用XRD、低温N2物理吸附-脱附和TEM对其织构和结构进行表征，考察在甲醛乙炔化反应中的催化活性和稳定性。结果表明，核壳结构催化剂整体外观呈球形，SiO2包覆层为有序介孔结构。与工业催化剂和未包覆的CuO-Bi2 O3粉体相比，核壳结构CuO-Bi2 O3@meso-SiO2催化剂在甲醛乙炔化反应中表现出更优异的稳定性。
為瞭提高銅鉍炔化催化劑的穩定性、抑製活性組分流失造成的活性下降和延長催化劑使用壽命，採用共沉澱法製備 CuO -Bi2 O3粉體，併使用溶膠-凝膠法對其進行包覆製備覈殼結構CuO-Bi2 O3@meso-SiO2催化劑，利用XRD、低溫N2物理吸附-脫附和TEM對其織構和結構進行錶徵，攷察在甲醛乙炔化反應中的催化活性和穩定性。結果錶明，覈殼結構催化劑整體外觀呈毬形，SiO2包覆層為有序介孔結構。與工業催化劑和未包覆的CuO-Bi2 O3粉體相比，覈殼結構CuO-Bi2 O3@meso-SiO2催化劑在甲醛乙炔化反應中錶現齣更優異的穩定性。
위료제고동필결화최화제적은정성、억제활성조분류실조성적활성하강화연장최화제사용수명，채용공침정법제비 CuO -Bi2 O3분체，병사용용효-응효법대기진행포복제비핵각결구CuO-Bi2 O3@meso-SiO2최화제，이용XRD、저온N2물리흡부-탈부화TEM대기직구화결구진행표정，고찰재갑철을결화반응중적최화활성화은정성。결과표명，핵각결구최화제정체외관정구형，SiO2포복층위유서개공결구。여공업최화제화미포복적CuO-Bi2 O3분체상비，핵각결구CuO-Bi2 O3@meso-SiO2최화제재갑철을결화반응중표현출경우이적은정성。
CuO-Bi2 O3 powder was prepared by coprecipitation method. Using CuO-Bi2 O3 powder as the core,core-shell CuO-Bi2 O3@meso-SiO2 catalyst was fabricated by sol-gel technology in order to improve the stability of CuO-Bi2 O3 catalyst employed in the ethynylation of formaldehyde,restrain its activity decrease caused by loss of active components,and prolong its life-span. The obtained catalyst was characterized by BET,XRD and TEM. The stability and activity of CuO-Bi2 O3@meso-SiO2 catalyst for formaldehyde ethynylation was investigated. The results indicated that CuO-Bi2 O3@meso-SiO2 catalyst possessed clear core-shell structure,and the silica shell composed of radially aligned mesoporous. Compared with commercial catalyst and CuO-Bi2 O3 powder,core-shell CuO-Bi2 O3@meso-SiO2 catalyst exhibited excellent stability in the reaction of formaldehyde ethynylation.
