The economic viability of biodiesel (BD) production is highly dependent on conversion techniques using inexpensive oil feedstocks. In this study, BD was synthesised by the thermally induced (non-catalytic) transesterification of oil extracted from camellia seed (42.23 wt% lipid content). The BD yield from the non-catalytic transesterification of camellia oil was higher than that from the alkali-catalysed process. The BD yield from the alkali-catalysed transesterification of camellia oil for 60 min was 84.1 wt%, whereas that from the non-catalytic process for ≤ 1 min at 360 ˚C was 93.5 wt%. To realise a virtuous circle in the production of BD, this study sought a strategic way to valorise oil-extracted biomass waste (lignocellulose-based). Specifically, this study sought a method for valorising biochar as an effective catalyst, hypothesizing that earth alkaline metals finely dispersed within the porous structure of biochar would effectively enhance catalytic capability. The BD yield in the presence of camellia biochar was 92.4 wt% (saturated at ≥ 240 ˚C). Thus, the reaction kinetics for the transesterification of camellia oil over camellia biochar was catalytically accelerated. Such efforts provide opportunities to enhance economic viability and realise the concept of a sustainable cycle in BD production.

中文翻译：

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使用生物炭作为生物柴油生产的催化剂


生物柴油 (BD) 生产的经济可行性高度依赖于使用廉价石油原料的转化技术。在本研究中，BD 是通过从山茶籽中提取的油（脂质含量为 42.23 wt%）进行热诱导（非催化）酯交换反应合成的。山茶油非催化酯交换法的BD收率高于碱催化法。山茶油碱催化酯交换反应 60 分钟的 BD 产率为 84.1 wt%，而非催化工艺在 360 ℃ ≤ 1 分钟的 BD 产率为 93.5 wt%。为了实现 BD 生产的良性循环，本研究寻求一种战略方法来提高提取油的生物质废物（基于木质纤维素）的价值。具体来说，本研究寻求一种将生物炭作为有效催化剂的方法，假设精细分散在生物炭多孔结构中的碱土金属将有效增强催化能力。存在山茶生物炭时，BD 产率为 92.4 wt%（在 ≥ 240 ℃ 时饱和）。因此，山茶油在山茶生物炭上的酯交换反应动力学被催化加速。这些努力为增强经济可行性和实现 BD 生产可持续循环的概念提供了机会。