摘要
通过高压连续微型反应装置 ,对镍 2 ,3,7,8,12 ,13,17,18 八乙基卟啉 (Ni OEP)在氮气和氢气中的反应行为进行了研究。实验结果表明 ,镍卟啉在氮气中的稳定性非常高 ,只有在高温 (5 0 0℃左右 )下才发生分解 ;而在氢气中 ,镍卟啉的稳定性比较低 ,即使不存在催化剂 ,反应条件较为温和 (温度不超过 40 0℃ ,压力小于 10MPa) ,也有相当一部分镍卟啉发生分解 ,脱除所配合的金属 ;镍卟啉的临氢脱金属反应过程分为两步 ,第一步是卟啉分子中一个吡咯环上的外环双键加氢生成镍卟酚 ,第二步镍卟酚分解 。
The reaction characteristics of nickel 2,3,7,8,12,13,17,18 octaethylporphyrin (Ni OEP) in the presence of N 2 and H 2 have been investigated by using a high pressure flow microreactor In the presence of N 2, Ni OEP is very stable, and there is no reaction below 420?℃ and it only decomposes at high temperature (about 500?℃) But in the presence of H 2, even in the absence of a catalyst and under mild reaction conditions, Ni OEP can decompose and nickel is removed The demetalation of Ni OEP in the presence of H 2 consists of two steps The first step is hydrogenation of nickel porphyrin to nickel chlorin, and the second step is decomposition of nickel chlorin and the removal of nickel
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2001年第3期264-268,共5页
Journal of Fuel Chemistry and Technology
