Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction

BAI Jing; LIN Guozhen; JIANG Qian; CHEN Wencheng; WANG Chenguang

doi:10.12434/j.issn.2097-2547.20240518

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Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction

更新时间：2025-05-29

- Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction
- Vol. 50, Issue 5, Pages: 83-92(2025)
- 作者机构：
  
  1.郑州大学机械与动力工程学院，河南郑州 450001
  2.中国科学院广州能源研究所，广东广州 510640
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240518
  CLC： TQ426;TK91
- Received：30 December 2024，
  
  Revised：14 February 2025，
  
  Published：25 May 2025
- 稿件说明：
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白净,林国珍,蒋倩等.CO加氢耦合甲苯烷基化制喷气燃料段芳烃[J].低碳化学与化工,2025,50(5):83-92.

BAI Jing,LIN Guozhen,JIANG Qian,et al.Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(5):83-92.
白净,林国珍,蒋倩等.CO加氢耦合甲苯烷基化制喷气燃料段芳烃[J].低碳化学与化工,2025,50(5):83-92. DOI： 10.12434/j.issn.2097-2547.20240518.

BAI Jing,LIN Guozhen,JIANG Qian,et al.Synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(5):83-92. DOI： 10.12434/j.issn.2097-2547.20240518.

摘要

费托合成（FTS）是将合成气转化为液体燃料和高附加值化学品的反应，但是费托合成的产物遵循Anderson-Schulz-Flory（ASF）分布，因此产物选择性的调控极具挑战性。Fe基费托合成催化剂可以高选择性制备烯烃，是费托合成中最常用的催化剂之一。ZSM-5分子筛具有良好的烯烃齐聚、烷基化和芳构化性能，因此常被用于费托合成后端的产物调控。合成气在Fe基催化剂耦合ZSM-5双功能催化剂作用下反应，产物主要是

烃类，喷气燃料段烃类的选择性较低，这限制了其在航空燃料生产中的应用。采用XRD、N

吸/脱附、SEM、Mössbauer、TEM、H

-TPR和NH

-TPD等方法表征了催化剂反应前后的各种性质，提出了CO加氢耦合甲苯烷基化制喷气燃料段芳烃的新策略。结果表明，在反应温度260 ℃、反应压力2 MPa、

(CO) = 1、反应空速1500 mL/(g·h)和甲苯空速0.4 h

-1

的条件下，在Na-Fe + ZSM-5催化剂作用下，合成气经费托合成在Fe基催化剂上选择性生成低碳（C

）烯烃，原位生成的低碳烯烃在ZSM-5上的酸性位点与甲苯发生烷基化反应生成喷气燃料段芳烃。其中，C

烃类产物的主要成分是芳烃，其占比为72%（物质的量分数），证明了CO加氢耦合甲苯烷基化反应在串联催化剂作用下合成喷气燃料段芳烃是可行的。

Abstract

Fischer-Tropsch synthesis (FTS) is a reaction that converts syngas into liquid fuels and high value-added chemicals. The product distribution of Fischer-Tropsch synthesis follows the Anderson-Schulz-Flory (ASF) distribution

so the regulation of product distribution is a challenge. Fe-based Fischer-Tropsch synthesis catalysts could selectively prepare olefins

which is one of the most commonly used catalysts in Fischer-Tropsch synthesis. ZSM-5 molecular sieve presents great performance of olefin oligomerization

alkylation and aromatization

and is therefore often used for product regulation at the downstream end of Fischer-Tropsch synthesis. The reaction products of syngas under the coupling of Fe-based catalyst and ZSM-5 bi-functional catalyst are mainly C

hydrocarbons

with low selectivity of hydrocarbons of jet fuel

which limits its application in aviation fuel production. The catalysts before and after reaction were characterized by XRD

adsorption/desorption

SEM

Mössbauer

TEM

-TPR

-TPD and so on. A new strategy of synthesis of aromatics of jet fuel by coupling of CO hydrogenation and toluene alkylation reaction was proposed. The results show that under the reaction temperature of 260 ℃

pressure of 2.0 MPa

(CO) = 1

reaction space velocity of 1500 mL/(g·h) and toluene space velocity of

0.4 h

-1

with Na-Fe + ZSM-5 catalyst

syngas undergoes the Fischer-Tropsch synthesis reaction on the Fe-based catalyst to generate low-carbon (C

) olefins

and subsequently the in situ formed low-carbon olefins undergo alkylation reactions with toluene on the acidic sites of ZSM-5 to produce aromatics of jet fuel. The main components of C

hydrocarbon products are aromatics

accounting for 72% (mole fraction)

which demonstrates that synthesis of aromatics of jet fuel by the coupling of CO hydrogenation and toluene alkylation reaction with tandem catalyst is feasible.

关键词

Keywords

references

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