化工进展 ›› 2022, Vol. 41 ›› Issue (1): 146-152.DOI: 10.16085/j.issn.1000-6613.2021-0181

• 能源加工与技术 • 上一篇    下一篇

贫氧条件下正癸烷在Pt/ZSM-5上的催化燃烧特性

徐露(), 周俊虎, 张兴, 朱晓宇, 姚彦伊, 杨卫娟()   

  1. 浙江大学能源清洁利用国家重点实验室,浙江 杭州 310027
  • 收稿日期:2021-01-26 修回日期:2021-02-24 出版日期:2022-01-05 发布日期:2022-01-24
  • 通讯作者: 杨卫娟
  • 作者简介:徐露(1996—),女,硕士研究生,研究方向为工程热物理。E-mail:21927030@zju.edu.cn
  • 基金资助:
    国家自然科学基金(51876189)

Catalytic combustion characteristics of n-decane on Pt/ZSM-5 under oxygen deficient conditions

XU Lu(), ZHOU Junhu, ZHANG Xing, ZHU Xiaoyu, YAO Yanyi, YANG Weijuan()   

  1. State Key Laboratory of Clean Energy Utilization,Institute for Thermal Power Engineering,Zhejiang University,Hangzhou 310027,Zhejiang, China
  • Received:2021-01-26 Revised:2021-02-24 Online:2022-01-05 Published:2022-01-24
  • Contact: YANG Weijuan

摘要:

航空煤油实际燃烧过程中往往存在高化学当量比(Φ)的贫氧条件,导致航空煤油着火困难、燃烧效率较低。本文以航空煤油一元替代燃料正癸烷为燃料,实验研究了贫氧条件下(Φ=2~4)微圆管内Pt/ZSM-5催化剂和石英砂填充床中正癸烷的贫氧催化/无催化燃烧特性,分析了当量比(Φ=2~4)、温度(300~450℃)和催化剂对正癸烷转化率、燃烧效率以及气相产物分布特性的影响。结果表明:Pt/ZSM-5催化剂对正癸烷燃烧反应的促进作用明显,存在温度激增现象,当量比Φ从2增大到3.5时,动态着火点从196℃上升到271℃,而无催化则没有明显的着火点。贫氧催化条件下正癸烷的转化率始终低于无催化条件,但燃烧效率明显高于无催化。正癸烷催化燃烧的主要气相产物为CO2,无催化的主要气相产物则为CO和烯烃。

关键词: 正癸烷, 催化燃烧, 贫氧, 热裂解, 燃烧效率

Abstract:

The actual combustion process of aviation kerosene often has high stoichiometric ratio (Φ) oxygen-lean conditions. In this paper, n-decane was used as a one-element alternative fuel of aviation kerosene, and the oxygen-depleted catalytic/non-catalytic combustion characteristics of n-decane in micro tube with Pt/ZSM-5 catalyst or quartz sand packed bed were experimentally studied under oxygen-lean conditions (Φ=2—4). The effects of equivalence ratio (Φ=2—4), temperature (300—450℃) and catalyst on the conversion rate of n-decane, combustion efficiency and gas phase product distribution were analyzed. The results showed that the Pt/ZSM-5 catalyst had an obvious promotion effect on the combustion reaction of n-decane, and there was a phenomenon of temperature surge. When the equivalence ratio Φ increased from 2 to 3.5, the dynamic ignition point rised from 196℃ to 271℃; while without catalysis, there was no obvious point of ignition. The conversion rate of n-decane under the oxygen-lean catalysis condition was always lower than that under the no catalysis condition, but the combustion efficiency was significantly higher than that under the no catalysis condition. The main gas-phase product of catalytic combustion of n-decane was CO2, and the main gas-phase product without catalysis was CO and olefins.

Key words: n-decane, catalytic combustion, oxygen-lean, thermal cracking, combustion efficiency

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