【摘要】 在一个常压固定床流动体系,对甲烷氧化偶联合成乙烯、乙烷反应的催化剂,以 TiO₂为载体进行了深入研究,提出一种稳定性好的复合氧化物催化剂.使用2g 该催化剂,在常压、1073K,CH₄∶O₂∶N₂=15∶6∶15m/min 的反应条件下,反应246h 后,C₂产率和选择率仍分别保持在30.8%和82.5%以上,是目前已见报的最好的催化剂.根据 X 射线物相分析等实验,提出了催化剂的活性中心结构.更多还原

【Abstract】 Promoted TiO₂—supported oxides of the first row transition metals for the Catalytic Oxidative coupling of methane are studied.A more stable catalyst of compound oxides is found.The reaction is carried out at 1073K and a atmos- pheric pressure,catalyst being 2g,the total flow rate being 36 ml/min（CH₄:O₂: N₂=15:6:15）.After the life test of 246 h,the steady ratio of yield and selectivity of C₂-hydrocarbons is 30.8% and 82.5% respectively.It is the best catalyst reported at present. Accordingto the result of experiments（analysis by X-ray,ect.）activation center construction of the catalysis,is presented.更多还原