摘要
为降低煤气化时焦油产率、提高煤气产率，利用固定床反应器研究了焦油的两种主要组分苯和甲苯在氧化钙条件下的裂解反应特性，探讨了氧化钙的催化机理。实验结果表明，与石英砂条件下相比，氧化钙在苯和甲苯裂解反应中具有催化作用，改变了反应路径，使苯和甲苯裂解活化能分别下降２８．６６％，４７．８７％，频率因子分别下降３，６个数量级；相同转化率所需温度分别下降约１５０℃，１００℃；碳析出量降低，气态裂解产物总产率提高。
In order to reduce the yield of tar and increase the yield of gas in coal gasification, the cracking reactions of the two main components, benzene and toluene, over CaO in fixed bed reactor are expermentally investigated. And the catalytic mechanism is also discussed. The experimental results show that CaO catalyzes the cracking reactions of benzene and toluene and the paths are changed. The cracking active energy of benzene and toluene can be declined to 28.66% and 47.87% over CaO compared with that over quartz, and frequency factor is decreased by three and six orders of magnitude respectively. While the temperature needed for the same conversion rate is decreased by 100 ℃ and 150 ℃ respectively. The yield of coke reduces while the total yield of gas cracking products increases.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第2期6-10,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家"八五"攻关项目
关键词
氧化钙
焦油
催化裂解
动力学
裂解
CaO
tar components
catalytic cracking
kinetic parameters
