High Selectivity CO2 Hydrogenation to Liquid Fuel Over NaFeZnMn Catalyst

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-11-08 DOI:10.1007/s10562-024-04869-7

Tong Zhang, Zhongrui Li, Juan Qiu, Jing Bai, Baowei Cao, Shihang Xu, Hanying Wang, Yunhua Xu, Lei Guo

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Abstract

Direct synthesis of liquid fuel (C₅₊ hydrocarbons) through CO₂ hydrogenation has attracted considerable interest. However, it is plagued by high selectivity of C₁ by-products (CO and CH₄) and low reaction activity. Herein, we report that Na-FeZn catalysts promoted by a combination of metal additives and investigate their synergistic effect in the catalytic CO₂ hydrogenation reaction. The CO₂ conversion is high to 40.6% with the 68.3% C₅₊ selectivity. The characteristic results reveal the specific surface area has a great influence on the catalytic performance. Furthermore, the synergistic effect of Mn in the catalyst enhances CO₂ adsorption while weakening H₂ adsorption, thus remarkably promoting the carbon chain growth and limiting the production of C₁ products. This study offers a promising approach to modulating the metal electronic environment and improving carbon efficiency for CO₂ hydrogenation reactions.

Graphical Abstract

We present a simple NaFeZnMn-S nanocatalyst that can effectively catalyze CO₂ hydrogenation to C₅₊ hydrocarbons. The selectivity towards C₅₊ hydrocarbons is as high as 68.3% at 40.6% CO₂ conversion.

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在 NaFeZnMn 催化剂上将二氧化碳高选择性加氢转化为液体燃料

通过 CO2 加氢直接合成液体燃料（C5+ 碳氢化合物）引起了广泛关注。然而，C1 副产物（CO 和 CH4）的高选择性和低反应活性使其备受困扰。在此，我们报告了由金属添加剂组合促进的 Na-FeZn 催化剂，并研究了它们在催化 CO2 加氢反应中的协同效应。二氧化碳转化率高达 40.6%，C5+ 选择性为 68.3%。特征结果表明，比表面积对催化性能有很大影响。此外，催化剂中 Mn 的协同作用增强了对 CO2 的吸附，同时削弱了对 H2 的吸附，从而显著促进了碳链的生长，限制了 C1 产物的产生。这项研究为调节金属电子环境和提高 CO2 加氢反应的碳效率提供了一种很有前景的方法。在 CO2 转化率为 40.6% 时，对 C5+ 碳氢化合物的选择性高达 68.3%。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.