不同氧化物对螺旋藻热解的影响  

Effect of Different Oxides on Pyrolysis of Spirulina

作　　者：刘凯[1] 徐青[2,3] 苏颖辰 LIU Kai;XU Qing;SU Yingchen(Guangdong Techno-economy Research and Development Center,Guangzhou 510070,China;College of Ocean Engineering and Energy,Guangdong Ocean University,Zhanjiang 524088,China;Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]广东省技术经济研究发展中心,广东广州510070 [2]广东海洋大学海洋工程与能源学院,广东湛江524088 [3]广东省南海海洋牧场智能装备重点实验室,广东湛江524088

出　　处：《广东海洋大学学报》2025年第1期118-123,共6页Journal of Guangdong Ocean University

基　　金：国家自然科学基金(52476190);国家自然科学基金(52376171)。

摘　　要：【目的】研究黏土中Al_(2)O_(3)、MgO和SiO_(2)等常见氧化物对螺旋藻(Spirulina)热解行为的影响,为螺旋藻的高值化热解提供理论支持。【方法】采用热重分析仪和快速热解结合气相色谱质谱联用仪,分析螺旋藻的热解过程及产物。通过Flynm-Wall-Ozawa和Kissinger-Akahira-Sunose两种热解动力学模型,评估不同氧化物的催化效果,并对比分析其对热解温度、残留物质量及热解产物的影响。【结果】氧化物的引入使螺旋藻的热解温度范围扩大15~30℃,SiO_(2)促进了焦炭产率的提高。MgO作为碱性催化剂显著抑制了热解油中酸性物质的生成,酸性物质的生成率从23.49%降至10.66%。MgO对螺旋藻热解具有最强的促进作用。催化效果依次为MgO>Al_(2)O_(3)>SiO_(2)。动力学分析结果表明,加入氧化物Al_(2)O_(3)、MgO、SiO_(2)后,螺旋藻热解的平均表观活化能从207.84 kJ/mol分别下降至196.88、188.23和205.77 kJ/mol。【结论】黏土中氧化物对螺旋藻的热解产物分布和能量消耗有显著影响,其中Al_(2)O_(3)和MgO具有明显的催化作用,而SiO_(2)主要起到热量传递介质的作用。【Objective】To investigate the effect of common oxides(Al_(2)O_(3),MgO,and SiO_(2))in clay on the pyrolysis behavior of Spirulina.【Method】Thermogravimetric analysis(TGA)and fast pyrolysis combined with gas chromatography-mass spectrometry(GC-MS)were used to analyze the pyrolysis process and products of Spirulina.The catalytic effects of the oxides were evaluated using the Flynm-Wall-Ozawa(FWO)and Kissinger-Akahira-Sunose(KAS)kinetic models.The differences in pyrolysis temperature,residue mass,and product composition with and without the addition of oxides were compared.【Results】The introduction of oxides expanded the pyrolysis temperature range of Spirulina.SiO_(2)increased the yield of coke.MgO,as an alkaline catalyst,significantly inhibited the formation of acidic compounds in the pyrolysis oil,reducing their yield from 23.49%to 10.66%.MgO exhibited the strongest catalytic effect on Spirulina pyrolysis.The catalytic effectiveness followed the order:MgO>Al_(2)O_(3)>SiO_(2).Kinetic analysis showed that after the addition of oxides,the average activation energy of Spirulina pyrolysis decreased from 207.84 kJ/mol to 196.88 kJ/mol(Al_(2)O_(3)),188.23 kJ/mol(MgO),and 205.77 kJ/mol(SiO_(2)).【Conclusion】This study demonstrates that clay oxides significantly influence the distribution of pyrolysis products and energy consumption in Spirulina pyrolysis.Al_(2)O_(3)and MgO exhibit notable catalytic effects,while SiO_(2)primarily serves as a heat transfer medium.This provides important theoretical support for the high-value pyrolysis of Spirulina.

关 键 词：螺旋藻 催化热解 氧化物 热重分析 表观活化能 

分 类 号：TK6[动力工程及工程热物理—生物能]