石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (1): 160-165.doi: 10.3969/j.issn.1001-8719.2019.01.020

• 研究报道 • 上一篇    下一篇

介孔g-C3N4的制备及其对航空煤油的吸附脱硫性能

张月月,梁元伟,黄现礼,周宁,何建平   

  1. 南京航空航天大学 应用化学系,江苏 南京 211106
  • 收稿日期:2017-11-27 修回日期:2018-04-03 出版日期:2019-01-25 发布日期:2019-01-29
  • 通讯作者: 黄现礼,男,副教授,博士,从事光电催化方面的研究,E-mail:xianlihuang@163.com E-mail:xianlihuang@163.com
  • 作者简介:第一作者:张月月,女,硕士研究生,从事介孔材料方面的研究;E-mail:nuaa_zyy@163.com
  • 基金资助:
    中央高校基本科研业务费课题(NS2016057)和江苏高校优势学科建设工程项目(PAPD)资助

Mesoporous g-C3N4 Preparation and Its Application on Jet Fuel Desulfurization

ZHANG Yueyue, LIANG Yuanwei, HUANG Xianli, ZHOU Ning, HE Jianping   

  1. Department of Applied Chemistry, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • Received:2017-11-27 Revised:2018-04-03 Online:2019-01-25 Published:2019-01-29

摘要: 采用硬模板法制备了介孔类石墨相氮化碳(g-C3N4),在500、550、600 ℃下焙烧分别得到CN-500、CN-550、CN-600。采用XRD、TEM、FT-IR、FPD和N2吸脱附等分析手段对制备的介孔材料进行表征,考察了其对航空煤油(航煤)吸附脱硫的性能。结果表明:该介孔材料对噻吩有较好的吸附能力,550 ℃煅烧的样品 CN-550 吸附容量最大,为24 mgS)/g;其对真实航煤的脱硫吸附容量可达10.46 mgS)/g。g-C3N4介孔材料在用NaOH消除抗氧化剂后的航煤中对硫的吸附容量提升约50%。由于分子尺寸及位阻效应等影响,介孔g-C3N4对噻吩的吸附容量远大于对苯并噻吩吸附的吸附容量,对苯并噻吩及其衍生物的吸附能力较低是介孔g-C3N4对航煤脱硫性能下降的主要原因。

关键词: 介孔类石墨相氮化碳, 航空煤油, 吸附脱硫, 吸附容量(Q)

Abstract: Mesoporous g-C3N4 was prepared by SiO2 by a hard template method. Then the prepared mesoporous g-C3N4 was calcined at 500, 550 or 600 ℃ and its final products are assigned as CN-500, CN-550 and CN-600, respectively. The above calcined mesoporous absorbents were further characterized by XRD, TEM, FT-IR, FPD and N2 absorption-desorption, and their desulfurization performance for simulated fuel and jet fuel were investigated as well. Experimental results indicate that CN-550 has the best absorption capacity for thiophene, i.e, 24 mg(S)/g in simulated fuel. For jet fuels, the absorption capacity of CN-550 can be 10.46 mg(S)/g. After jet fuels were treated by NaOH, which eliminated the effect of antioxidant from fuel, the absorption capacity could increase 50%. The gas chromatogram analytical results for sulfur compounds suggest that the prepared absorbents have better absorption capacity for thiophene than benzothiophene due to size and steric effects. This is the main reason of their poor desulfurization performance for jet fuels.

Key words: mesoporous graphitic carbon nitride, jet fuel, absorption desulfurization, absorption capcity(Q)