摘要
本文采用Ｆｅ＿３（ＣＯ）＿（１２）制备担载型络合物催化剂。采用程序升温反应技术考察了这类催化剂（ＣＯ＋Ｈ＿２）的反应性能，井使用紫外漫反射光谱和穆斯堡尔谱对催化剂进行了表征。经２５０℃和１５０℃还原的Ｆｅ／γ－Ａｌ＿２Ｏ＿３催化剂不仅活性远远高于４５０℃还原的Ｆｅ／γ－Ａｌ＿２Ｏ＿３，而且前者在反应过程中有乙烯和乙烷生成，后者则只有甲烷生成。经２５０℃还原的Ｆｅ／分子筛催化剂的活性高于４５０℃还原的Ｆｅ／分子筛催化剂，而且前者在反应过程中有乙烯、乙烷和丙烯生成，后者则只有甲烷生成。紫外漫反射谱和穆斯堡尔谱结果表明：较温和条件下活化的催化剂上有金属于属键骨架的存在。
Iron catalysts supported on γ-Al_2O_3 and zeolite were prepared from organicsolution of Fe_3(CO)_(12).Temperature programmed catalytic reaction(TPCR)、Diffuse Re-flectance Spectrum(DRS) and Mossbauer spectra were used to monitor preparation andcharacterize the catalysts, Fe/γ-Al_2O_3 catalysts reduced at 150℃ and 250℃ not only havehigher activity than that reduced at 450℃,but also produce ethane and ethylene during(CO+H_2) reaction. Fe/zeolite catalyst reduced at 250℃ has higher activity than that reduced at450℃,and it also produces ethylene,ethane and propene.DRS and Mossbauer spectral re-sults suggest that Fe-Fe bonds of the complex Fe_3(CO)_(12) still exist on the catalyst activatedunder mild conditions.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1994年第2期151-156,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
