Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Bioresour Technol. 2022 Jan;344(Pt B):126188. doi: 10.1016/j.biortech.2021.126188. Epub 2021 Oct 25.
Combusting rice husk (RH) generates energy and rice husk ash (RHA) containing high amount of silica. Recent studies showed RHA can directly react with ethanol for producing tetraethyl orthosilicate (TEOS), an important substance for different industries. Nevertheless, this process requires an intensive energy supply. This study aims to design and evaluate an energy self-supply process producing TEOS using RH for feasibility. A process simulator was used to design the target process. The simulation results revealed that RH combustion can completely meet the RHA and high energy demands of TEOS production. The economic and environmental benefits were thoroughly evaluated and compared with processes using conventional raw materials (i.e., Si and silica). The evaluation results showed that using RH for TEOS production could reduce CO emissions substantially. Large economic benefit was gained when renewable electricity was co-generated and sold to the power grid as a surplus.
燃烧稻壳（RH）可产生能源，稻壳灰（RHA）则含有大量的硅。最近的研究表明，RHA 可以直接与乙醇反应，生成正硅酸乙酯（TEOS），这是许多行业的重要物质。然而，该过程需要大量的能源供应。本研究旨在设计和评估使用 RH 生产 TEOS 的自供能过程的可行性。使用过程模拟器来设计目标过程。模拟结果表明，RH 的燃烧可以完全满足 RHA 和 TEOS 生产所需的高能量需求。还对其经济和环境效益进行了深入评估，并与使用传统原料（即硅和二氧化硅）的工艺进行了比较。评估结果表明，使用 RH 生产 TEOS 可以显著减少 CO 排放。当可再生电力被联合产生并作为剩余电量出售给电网时，还可获得巨大的经济效益。
