电场增强催化甲烷合成碳二烃催化剂影响研究

本研究提出了在常温、常压电场增强等离子体条件下甲烷直接转化合成碳二烃的洁净工艺 ,在不同的放电电压、放电功率、甲烷进料流量和不同的催化剂作用下 ,甲烷能够以不同的转化率和选择性转变为碳二烃。对影响甲烷转化率和碳二烃选择性的因素 :放电电压、放电功率、甲烷进料流量和催化剂进行了研究 ,对催化剂性能进行了比较 ,并探讨了反应机理。结果表明 ,适宜的工艺条件 :放电电压 2 0kV～ 4 0kV ;输入功率 :2 0W～ 4 0W ;合适的甲烷进料流量 :30mL/min～ 70mL/min。在该条件下 ,碳二烃的选择性可以达到 95 % ;催化剂对甲烷转化率的影响顺序为MnO2 /Al2 O3 >Ni/Al2 O3 >MoO3 /Al2 O3 >Ni/NaY >Pd/ZSM 5 >Ni/H4Mg2 Si3 O4>Ni/ZSM 5 >Co/ZSM 5 >无催化剂。

EFFECT OF CATALYSTS ON METHANECONVERSION TO C2 HYDROCARBONS IN EFEP REACTION

In this investigation, a clean and direct conversion of methane to C2 hydrocarbons (ethane, ethylene and acetylene) in low-power EFEP(Electric Field Enhanced Plasma) reaction was developed under room temperature and atmospheric pressure. Methane can be converted into ethane, ethylene and acetylene in different selectivity and conversion depending on the discharge voltage, power of plasma, flow rate of methane and nature of catalyst. The effect of catalyst on methane conversion to C2 hydrocarbons was studied under different discharge voltage, power of plasma, flow rate of methane and catalyst. The function of catalyst was tested and compared. The mechanisms of reaction were discussed. The selectivity of C2 hydrocarbons was above 95%. The appropriate condition was voltage of 20?kV～40?kV, power of 20?W～40?W. The appropriate inlet flow rate of methane was 30?mL/min～70?mL/min. The sequence of the conversion of methane was MnO2/Al2O3>Ni/Al2O3>MoO3/Al2O3>Ni/NaY>Pd/ZSM-5>Ni/H4Mg2Si3O4>Ni/ZSM-5>Co/ZSM-5>without catalyst in EFEP reaction.