摘要
研究了CrF3基催化剂前驱体的热行为、催化剂的晶相和比表面积、孔容对催化剂活性的影响。结果表明,惰性气氛以及向前驱体中添加微量助剂可以提高其热稳定性;CrF3基催化剂的活性相以非晶态存在;随着比表面积和孔容的增大,催化剂的活性提高。考察了CrF3基催化剂对氟化HCFC 123合成HFC 125反应的催化性能。
The influences of thermal stability of the precursors andcrystal structure, surface area and pore volume of CrF_3-based catalysts on their activity were investigated The results showed that inert atmosphere and doping of small amount of promoter into the precursors promote the thermal stability; active component of CrF_3-based catalysts exists in amorphous phase; activity of the catalysts increases with surface area and pore volume. The catalytic properties of CrF_3-based catalysts for synthesis of HFC-125 by vapor-phase fluorination of HCFC-123 were investigated.
出处
《工业催化》
CAS
2004年第10期34-37,共4页
Industrial Catalysis
关键词
CrF3基催化剂
HFG125
热行为
气相氟化
CrF_3-based catalyst
vapor-phase fluorination of HCFC-123
HFC-125
thermal stability
catalytic activity
