Green synthesis of calcium oxide nanocatalyst and application in transesterification of waste cooking oil.

IF 5.1 3区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Bioresources and Bioprocessing Pub Date : 2025-06-02 DOI:10.1186/s40643-025-00879-4

Rajni Garg, Rishav Garg, Nnabuk Okon Eddy, Mukhtar Iderawumi Abdulraheem, Oluwadamilola Oluwatoyin Hazzan, Gholaremza Abdi

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Abstract

This study aims to synthesize calcium oxide nanoparticles by employing green synthetic methods and explore their potential as nano-catalyst based upon the utilization of waste into a value-based product. Waste orange peel extract has been utilized as a reducing medium. The reaction was optimized by varying the reactants' molar ratio to obtain calcium carbonate microparticles that were calcined to obtain calcium oxide nanoparticles with a particle size ranging from 70 to 100 nm. Various spectrochemical techniques analyzed the composition and morphology of the nano-catalyst. The nano-catalyst was further exploited in the one-pot transesterification of waste cooking oil. The biodiesel was analyzed for the presence of methyl ester groups by FTIR and GCMS analysis. The impact of varying reaction constraints, including temperature, contact time, nano-catalyst concentration, and methanol-oil molar ratio, were critically analyzed to optimize biodiesel yield. The study provided an economical and environmentally benign technique to successfully synthesize calcium oxide nano-catalyst to obtain biodiesel with 93.4% yield and effective waste minimization.

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氧化钙纳米催化剂的绿色合成及其在废食用油酯交换中的应用。

本研究旨在利用绿色合成方法合成氧化钙纳米颗粒，并在废物利用为价值产品的基础上探索其作为纳米催化剂的潜力。利用废橙皮提取物作为还原剂。通过改变反应物的摩尔比来优化反应，得到碳酸钙微粒，煅烧得到粒径在70 ~ 100 nm之间的氧化钙纳米颗粒。各种光谱化学技术分析了纳米催化剂的组成和形态。在废食用油一锅酯交换反应中进一步开发了纳米催化剂。利用红外光谱（FTIR）和气相色谱仪（GCMS）分析生物柴油中是否存在甲酯基团。对温度、接触时间、纳米催化剂浓度和甲醇-油摩尔比等不同反应条件的影响进行了严格分析，以优化生物柴油的产量。该研究为成功合成氧化钙纳米催化剂制备生物柴油提供了一种经济环保的技术，产率达到93.4%，并有效地减少了废物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresources and Bioprocessing BIOTECHNOLOGY & APPLIED MICROBIOLOGY-

CiteScore

7.20

自引率

8.70%

发文量

118

审稿时长

13 weeks

期刊介绍： Bioresources and Bioprocessing (BIOB) is a peer-reviewed open access journal published under the brand SpringerOpen. BIOB aims at providing an international academic platform for exchanging views on and promoting research to support bioresource development, processing and utilization in a sustainable manner. As an application-oriented research journal, BIOB covers not only the application and management of bioresource technology but also the design and development of bioprocesses that will lead to new and sustainable production processes. BIOB publishes original and review articles on most topics relating to bioresource and bioprocess engineering, including: -Biochemical and microbiological engineering -Biocatalysis and biotransformation -Biosynthesis and metabolic engineering -Bioprocess and biosystems engineering -Bioenergy and biorefinery -Cell culture and biomedical engineering -Food, agricultural and marine biotechnology -Bioseparation and biopurification engineering -Bioremediation and environmental biotechnology