Valorization of dairy waste scum oil and rice husk ash-supported CuO nanocatalyst towards cleaner production of biodiesel: A waste-to-energy approach

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-11-05 DOI:10.1016/j.psep.2024.10.124

Basir Maleki , Hossein Esmaeili , Yatish Kalanakoppal Venkatesh , Amruth E

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引用次数: 0

Abstract

This study surveys the valorization of dairy waste scum oils (DWSO) to synthesis biodiesel using a novel rice husk ash-supported CuO nanocatalyst. The rice husk ash-supported CuO nanocatalyst was synthesized through a facile impregnation method and characterized by BET, XRD, FTIR, EDX, CO₂/TPD, TEM, and FESEM to confirm its structural and morphological features. Transesterification of DWSO was conducted under optimized conditions, achieving a maximum biodiesel yield of 97.42 % at temperature of 62.36°C, methanol/DWSO proportion of 11:12, and nanocatalyst loading of 2.76 wt% within 2.85 h. Kinetic studies revealed that the transesterification reaction follows a pseudo-first-order model with an activation energy of 100.34 kJ/mol. Thermodynamic analysis indicated that the reaction is endothermic (ΔH = 100.26 kJ/mol) and non-spontaneous (ΔG = −11043.6 kJ/mol) at the studied temperature range, suggesting the requirement of external heat to drive the process. Reusability tests demonstrated that the rice husk ash-supported CuO nanocatalyst retains over 86 % of its initial activity after seven cycles, highlighting its potential for practical applications. This study highlights the dual benefits of utilizing agro-industrial waste for both feedstock and catalyst support, promoting a cleaner and economically viable approach for biodiesel generation.

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奶制品废渣油和稻壳灰支持的 CuO 纳米催化剂的价值化，以实现生物柴油的清洁生产：废物变能源方法

本研究调查了利用新型稻壳灰支撑的 CuO 纳米催化剂对奶制品废渣油（DWSO）进行增值以合成生物柴油的情况。研究采用简便的浸渍法合成了稻壳灰支撑的 CuO 纳米催化剂，并通过 BET、XRD、FTIR、EDX、CO2/TPD、TEM 和 FESEM 对其结构和形态特征进行了表征。在优化条件下进行了 DWSO 的酯交换反应，在温度为 62.36°C、甲醇/DWSO 比例为 11:12、纳米催化剂负载量为 2.76 wt% 的条件下，2.85 h 内生物柴油的最高产率达到 97.42%。动力学研究表明，酯交换反应遵循伪一阶模型，活化能为 100.34 kJ/mol。热力学分析表明，在所研究的温度范围内，反应是内热的（ΔH = 100.26 kJ/mol），并且是非自发的（ΔG = -11043.6 kJ/mol），这表明需要外部热量来驱动反应过程。可重复使用性测试表明，以稻壳灰为支撑的 CuO 纳米催化剂在七个循环后仍能保持其 86% 以上的初始活性，这突显了其在实际应用中的潜力。这项研究强调了利用农用工业废物作为原料和催化剂支撑的双重好处，促进了一种更清洁、经济可行的生物柴油生成方法。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.