【摘要】 固定甲苯、催化剂及配体用量,对乙烯在甲苯溶剂中的氢甲酰化反应动力学进行了研究。以反应计量比为1:1:1的乙烯、一氧化碳和氢气为反应混合气,测定了100℃、93℃和81℃下反应压力随时间的变化曲线,通过动力学方程求解获得了3种气体总的反应级数、反应速率常数和活化能,得到反应的活化能为55.0 k J/mol。进一步通过一氧化碳和氢气过量,得到了乙烯的反应级数。然后通过氢气过量,得到了乙烯和一氧化碳的总反应级数,随后即计算得到了一氧化碳和氢气各自的反应级数,表明一氧化碳分压高会抑制反应速率,而增加乙烯和氢气分压对反应速率有促进作用。更多还原

【Abstract】 Kinetics of ethylene hydroformylation using toluene as solvent was investigated by changing the temperature and molar ratio of C2H4, CO and H2 with fixed amounts of toluene, catalyst, and ligand. The reaction pressure changing with time with the reactant gas of C2H4:CO:H2 = 1:1:1 was determined at 100°C, 93°C, and 81°C. The sum reaction order of three gases, constant rate constant and activation energy were calculated. The activation energy of the reaction was 55.0 k J/mol. By overdosing CO and H2, the reaction order of C2H4 was gotten. And by overdosing H2, the sum reaction order of C2H4 and CO was obtained, then the respective reaction order of C2H4 and CO was calculated. The results showed that high partial pressure of CO was not good for the reaction rate, and the reaction rate increased with the partial pressure increasing of C2H4 or H2.更多还原