Optimizing pyrolysis parameters and product analysis of a fluidized bed pilot plant for Leucaena leucocephala biomass

IF 5.9 3区环境科学与生态学 Q1 Environmental Science

Environmental Sciences Europe Pub Date : 2023-10-31 DOI:10.1186/s12302-023-00800-w

S. Clemente-Castro, A. Palma, M. Ruiz-Montoya, I. Giráldez, M. J. Díaz

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Abstract

This study aimed to optimize the production of bio-oil from Leucaena leucocephala wood using a fluidized bed reactor. Response surface methodology was used to optimize the fast pyrolysis through three operational parameters: pyrolysis temperature, nitrogen flow rate, and temperature of the first condensation stage. The optimum conditions obtained for bio-oil production were 500 °C, 26.4 L min^–1, that is, about 3.3 times the minimum fluidization flow, and 80 °C, respectively. The bio-oil obtained under optimum conditions was of good quality and did not require further treatment. Physical properties of the bio-oil were analysed according to ASTM D7544-12. In addition, the chemical composition of the non-condensed gases and bio-oil were identified using GC–MS. The non-condensed gases were found to contain mainly ketones and lignin derivatives, while the bio-oil contained cyclic ketones, alcohol ethers, aromatic alcohols, and lignin derivatives. The study found that increasing the pyrolysis temperature did not significantly increase the yield of H₂ and CO for syngas production. Regarding the solid obtained, a large amount of unreacted material (66.7 wt.%) is generated at 400 °C, and as the temperature is increased, a high-quality biochar is obtained.

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白头翁生物质流化床中试装置热解参数优化及产物分析

本研究旨在优化利用流化床反应器从银杏木中提取生物油的工艺。采用响应面法，通过热解温度、氮气流量和第一冷凝段温度三个操作参数对快速热解进行优化。所得生物油的最佳产油条件分别为500℃、26.4 L min-1(约为最小流化流量的3.3倍)和80℃。在最佳条件下得到的生物油质量好，无需进一步处理。根据ASTM D7544-12对生物油的物理性质进行了分析。此外，采用气相色谱-质谱法鉴定了非冷凝气体和生物油的化学成分。非冷凝气体主要含酮类和木质素衍生物，生物油主要含环酮类、醇醚类、芳香醇类和木质素衍生物。研究发现，提高热解温度并没有显著提高合成气中H2和CO的产率。所得固体，在400℃时产生大量未反应物质(66.7 wt.%)，随着温度的升高，可得到高质量的生物炭。

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来源期刊

Environmental Sciences Europe Environmental Science-Pollution

CiteScore

9.20

自引率

1.70%

发文量

110

审稿时长

13 weeks

期刊介绍： ESEU is an international journal, focusing primarily on Europe, with a broad scope covering all aspects of environmental sciences, including the main topic regulation. ESEU will discuss the entanglement between environmental sciences and regulation because, in recent years, there have been misunderstandings and even disagreement between stakeholders in these two areas. ESEU will help to improve the comprehension of issues between environmental sciences and regulation. ESEU will be an outlet from the German-speaking (DACH) countries to Europe and an inlet from Europe to the DACH countries regarding environmental sciences and regulation. Moreover, ESEU will facilitate the exchange of ideas and interaction between Europe and the DACH countries regarding environmental regulatory issues. Although Europe is at the center of ESEU, the journal will not exclude the rest of the world, because regulatory issues pertaining to environmental sciences can be fully seen only from a global perspective.