Experimental study on toluene cracking in eutectic salts
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摘要: 固定床内研究了甲苯裂解特性，考察了熔融盐种类、裂解条件对甲苯裂解率、气体产物及苯产率的影响。结果表明,熔融盐对甲苯裂解有明显的催化作用，添加熔融盐时，相同裂解温度下甲苯裂解率明显提高。在71%Na2CO3+29%K2CO3（NK）盐和8.3%Na2CO3+91.7%NaOH（NN）盐中800℃催化裂解时，与热裂解相比，甲苯裂解率分别提高27%和46%,苯产率明显减少。NN盐催化裂解时，750℃后产物中的氢气主要来源于裂解碳与NN盐的反应。Abstract: The toluene cracking experiments were carried out in an eutectic salt reactor. Catalytic effects of NN salt (8.3%Na2CO3+91.7%NaOH) and NK salt (71%Na2CO3+29%K2CO3) on the toluene cracking rate, gas product yield and benzene yield were investigated. The results show that the eutectic salts have obvious catalyses on the toluene cracking. When cracking at 800℃ with NK salt and NN salt, the toluene cracking rates are increased by 27% and 46%, respectively, compared with thermal cracking. And the benzene yield is greatly reduced. When cracking with NN salt at a temperature higher than 750℃, H2 in gas product is mainly from the reaction between NN slat and the cracking tar.
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Key words:
- toluene /
- eutectic salts /
- cracking
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