Diesel Production by Catalytic Cracking of Castor Oil Using Aluminas and Silicas

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2024-12-02 DOI:10.1007/s10562-024-04874-w

Eric B. Ribeiro, Leila O. Daher, Elaine A. Faria, Fernando C. Garcia, Mirian S. C. Pereira, Joel C. Rubim, Alexandre G. S. Prado, Paulo A. Z. Suarez, Romulo D. A. Andrade

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Abstract

The purely thermal cracking of castor oil produces a mixture of compounds with unsatisfactory fuel properties, as high viscosity, high acid value and low cetane index. This low quality is associated with high value of oxygenated products in obtained product composition. The aim of this work was to improve the physical–chemical properties of cracking product (pyrolysis) of castor oil using different catalysts, such as silica and silica doped with titanium (IV) oxide, and alumina and alumina doped with zinc(II), tin(II), titanium(IV) and zirconium(IV) oxides. The study of the physical–chemical properties of the castor oil cracking products showed that all these catalysts have activity in the deoxygenating, being the better results reached using pure and doped alumina. We also studied the catalytic activity of laboratory synthesized alumina (pure and as support for Lewis acid metals), commercial silica (Merck) and titanium (IV) oxide supported on silica, in the cracking of castor oil. It was observed that the aluminas showed better activity in the deoxygenating of the products than silicas. This fact can be explained by higher acidity and mesoporous characteristic of the aluminas.

Graphical Abstract

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用氧化铝和二氧化硅催化蓖麻油裂解生产柴油

蓖麻油的纯热裂解产生的混合物具有令人不满意的燃料性能，如高粘度，高酸值和低十六烷指数。这种低质量与所获得的产品组成中氧化产物的高价值有关。采用不同的催化剂，如掺杂氧化钛（IV）的二氧化硅和二氧化硅，以及掺杂锌（II）、锡（II）、钛（IV）和锆（IV）氧化物的氧化铝和氧化铝，以改善蓖麻油裂解产物（热解）的物理化学性质。对蓖麻油裂解产物的理化性质进行了研究，结果表明，这些催化剂都具有一定的脱氧活性，其中纯氧化铝和掺杂氧化铝的脱氧效果较好。我们还研究了实验室合成的氧化铝（纯的，作为路易斯酸金属的载体），商业二氧化硅（默克）和二氧化硅负载的氧化钛（IV）在蓖麻油裂解中的催化活性。结果表明，氧化铝对产物的脱氧活性优于二氧化硅。这可以用氧化铝的高酸性和介孔特性来解释。图形抽象

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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.