5a CH3CH2OH C 2 H 4 ＋ H 2 O Al 2 O 3 623~ 683 Gas ,soli d Control the Selectivity for different products 5b CH3CH2OH （ C 2 H 5 ） 2 O ＋ H 2 O Al 2 O 3 523 Gas ,soli d 6a CH 4 ＋ O 2 CO ＋H 2 Ni/Al 2 O 3 673~ 1273 0.1013~ 10 5 h －1) Gas ,soli d Control the Selectivity for different products 6b CH 4 ＋ O 2 CO 2 ＋H2O Ni/Al 2 O 3 ＞673 0.1013 气 体时空 速率 ~1000 h－1 Gas ,soli d
5a CH3CH2OH C 2 H 4 ＋ H 2 O Al 2 O 3 623~ 683 Gas ,soli d Control the Selectivity for different products 5b CH3CH2OH （ C 2 H 5 ） 2 O ＋ H 2 O Al 2 O 3 523 Gas ,soli d 6a CH 4 ＋ O 2 CO ＋H 2 Ni/Al 2 O 3 673~ 1273 0.1013~ 10 5 h －1) Gas ,soli d Control the Selectivity for different products 6b CH 4 ＋ O 2 CO 2 ＋H2O Ni/Al 2 O 3 ＞673 0.1013 气 体时空 速率 ~1000 h－1 Gas ,soli d
The application of catalysts to chemical reaction ❖ Accelerate the chemical reaction rate ❖ Accelerate selectively the one of the several thermodynamically possible reactions and yield selectively the special products. ❖ Namely, the use of catalysts can control the selectivity for special products. ❖ Control the enantioselectivity of reaction
The application of catalysts to chemical reaction ❖ Accelerate the chemical reaction rate ❖ Accelerate selectively the one of the several thermodynamically possible reactions and yield selectively the special products. ❖ Namely, the use of catalysts can control the selectivity for special products. ❖ Control the enantioselectivity of reaction
❖ Synthesize the special conformation of chiral isomers ❖ Incorporate with reaction conditions, and control the selectivity of chemical reaction. Catalyst has been called as molecular machine ❖ It is the most important of high selectivity and atom economy in bios-process, and all the reactions in biomass are catalyzed by enzyme. ❖ high specificities, selectivity and atom economy
❖ Synthesize the special conformation of chiral isomers ❖ Incorporate with reaction conditions, and control the selectivity of chemical reaction. Catalyst has been called as molecular machine ❖ It is the most important of high selectivity and atom economy in bios-process, and all the reactions in biomass are catalyzed by enzyme. ❖ high specificities, selectivity and atom economy
Catalyst has been called as molecular machine Hence, those enzyme have been called as Molecular Machine ADP ATP ATP ADP ATP→AD ADP P+Pi ATP ADP A hand-over-hand mechanism for kinesin
Catalyst has been called as molecular machine Hence, those enzyme have been called as Molecular Machine ADP ATP ATP ADP ATP→AD ADP P+Pi ATP ADP A hand-over-hand mechanism for kinesin
❖ Recent investigations have reported that not only enzyme acts as molecular machine but also the common catalysts own the similar functions. ❖ The classical example is the metal cyclopentadiene(环戊二烯) complex which was used as the catalyst in olefin polymerization Catalyst has been called as molecular machine
❖ Recent investigations have reported that not only enzyme acts as molecular machine but also the common catalysts own the similar functions. ❖ The classical example is the metal cyclopentadiene(环戊二烯) complex which was used as the catalyst in olefin polymerization Catalyst has been called as molecular machine