化工进展 ›› 2022, Vol. 41 ›› Issue (3): 1298-1308.DOI: 10.16085/j.issn.1000-6613.2021-2028

• 二氧化碳的捕集、封存及利用 • 上一篇    下一篇

基于金属有机骨架和稻谷壳前体构筑ZnZrO x &bio-SAPO-34双功能催化剂及CO2加氢制低碳烯烃

李雯1(), 詹国武2(), 黄加乐3, 李清彪3   

  1. 1.福州大学先进制造学院,福建 晋江 362200
    2.华侨大学化工学院,福建 厦门 361021
    3.厦门大学化学化工学院,福建 厦门 361005
  • 收稿日期:2021-09-27 修回日期:2021-12-17 出版日期:2022-03-23 发布日期:2022-03-28
  • 通讯作者: 詹国武
  • 作者简介:李雯(1988—),女,博士,研究方向为CO2资源化利用。E-mail:liwen@fzu.edu.cn
  • 基金资助:
    福州大学贵重仪器设备开放测试基金(2022T027);国家自然科学基金(21908073)

Synthesis of ZnZrO x &bio-SAPO-34 bifunctional catalysts derived from metal organic frameworks and rice husk template for CO2 hydrogenation to light olefins

LI Wen1(), ZHAN Guowu2(), HUANG Jiale3, LI Qingbiao3   

  1. 1.College of Advanced Manufacturing, Fuzhou University, Jinjiang 362200, Fujian, China
    2.College of Chemical Engineering, Huaqiao University, Xiamen 361021, Fujian, China
    3.College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2021-09-27 Revised:2021-12-17 Online:2022-03-23 Published:2022-03-28
  • Contact: ZHAN Guowu

摘要:

CO2过量排放导致全球气候异常,通过CO2催化加氢将CO2转化为具有高附加值的基础化学品或燃料是实现碳循环的有效方式,同时也有助于实现我国的“碳中和”目标。本文报道了基于稻谷壳前体制备具有多层次、相互贯通的介孔及大孔结构的bio-SAPO-34分子筛,该结构有利于反应过程中反应中间体的传质。本文系统地研究了分子筛前体液浓度、微孔导向剂种类及浓度、生物模板加入量等因素对bio-SAPO-34合成过程中维持生物模板分级结构的影响规律。将bio-SAPO-34与ZnZrO x 固溶体氧化物组装构筑ZnZrO x &bio-SAPO-34双功能催化剂用于催化CO2加氢制备低碳烯烃反应。在380℃、3MPa的反应条件下,双功能催化剂的CO2转化率为11.8%,低碳烯烃的选择性为66.4%(占烃类产物),且经过连续反应60h后未发现催化剂明显失活。

关键词: 二氧化碳, 生物模板, 分子筛, 催化, 还原

Abstract:

The excessive emission of greenhouse gas CO2 has caused global climate change. Catalytic conversion of CO2via hydrogenation is a promising route for the achievement of carbon circular economy and carbon neutralization target. In this study, the bio-SAPO-34 with multiple meso- and macro- structures was synthesized by using rice husk as the bio-template. The hierarchical structure of bio-SAPO-34 facilitated the diffusion of reaction intermediates and improved the catalytic activity. The effect of synthesis parameters such as precursor concentration, structure-directing agent and the amount of rice husks on the replication the architecture of rice husks biotemplate have been systematically studied. Moreover, the ZnZrO x was composited with bio-SAPO-34 to form ZnZrO x &bio-SAPO-34 bifunctional catalyst for CO2 hydrogenation to light olefins. Under reaction conditions of 380℃ and 3MPa, the selectivity of low olefins was 66.4% (in hydrocarbon products) with a CO2 conversion of 11.8%. Furthermore, the obtained ZnZrO x &bio-SAPO-34 bifunctional catalysts showed excellent stability in a 60h long-term test.

Key words: carbon dioxide, biotemplating, molecular sieves, catalysis, reduction

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