文献类型：期刊文献

英文题名：Species Selection, Scale-Up Cultivation, and Oil Characterization of Microalgae for Sustainable Biolubricant Production

作者：Nguyen, Duong T.[1];Silitonga, A. S.[1];Johir, Md Abu Hasan[1];Cai, Zhengqing[3];Kuzhiumparambil, Unnikrishnan[4];Ralph, Peter[4];Nghiem, Long D.[1,2]

机构：[1]Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;[2]VinUnivers, Smart Green Transformat Ctr, Hanoi 100000, Vietnam;[3]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[4]Univ Technol Sydney, Climate Change Cluster, Ultimo, NSW 2007, Australia

年份：2026

卷号：14

期号：16

起止页码：7963

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20261820603430);WOS:【SCI-EXPANDED(收录号:WOS:001739431300001)】；

基金：D.T.N. acknowledged financial support via an Australian Government Research Training Program Scholarship at the University of Technology Sydney. The authors also gratefully acknowledged financial support from the UTS-VinUniversity Key Partnership Program and the UTS Global Strategic Partnership.

语种：英文

外文关键词：microalgae; biolubricants; fattyacid methylesters (FAMEs); tribological properties; viscosity; oxidative stability; thermal stability

摘要：This study provides new insights into the development of microalgae-derived oil for biolubricant production through integrated species selection, nutrient-based cultivation optimization, and comprehensive oil characterization. Among the investigated species, Chlorella vulgaris exhibited the highest lipid content (15.5%, dry weight basis) along with a favorable fatty acid methyl ester (FAME) profile, predominantly composed of C16:0 (methyl palmitate) and C18:1 (cis-9-oleic acid methyl ester), making it the prime candidate for scale-up cultivation. Cultivation in Cell-Hi HP medium achieved a high growth rate (mu = 0.6 d-1) while simultaneously elevating lipid accumulation (27.2%), overcoming the conventional trade-off between productivity and oil quality. The extracted oil is compatible for lubricant production, being enriched in long-chain fatty acyl groups and ester functionalities that govern film formation, load-carrying capacity, and oxidative stability. Its balanced fatty acid composition, comprising 47.5% saturated fatty acids (SFAs), 34.5% monounsaturated fatty acids (MUFAs), and 18.0% polyunsaturated fatty acids (PUFAs), closely matches the compositional window required for a durable biolubricant. The oil extracted from microalgae meets ISO VG 15-22 viscosity specifications (17.7 mm2 & centerdot;s-1 at 40 degrees C) and demonstrates high thermal stability (236 degrees C), supporting suitability for light- to medium-duty lubrication under elevated temperatures. Further, the microalgae oil exhibits a high calorific value (36.1 MJ kg-1), underscoring its molecular robustness and thermal resilience. Although the acid value exceeded limits for finished lubricants, this represents a routine upgrading step rather than an intrinsic limitation. Tribological assessment via four-ball testing confirmed effective boundary lubrication, with a coefficient of friction of 0.08 and a wear scar diameter of 664 mu m. These results position microalgae oil as a scalable, performance-competitive alternative to petroleum- and plant-derived lubricant base oils, with clear implications for sustainable lubrication technologies.