摘要
为探究蓝藻生物炭掺和对原料热解特性和释放气体产物的影响,以铜绿微囊藻(MA)为原料,基于热重红外联用技术(TG-FTIR)研究铜绿微囊藻生物炭(MAC)掺和前后混合样的热解特性与气体产物变化。结果表明,混合样品热解主要区间由322~434℃变为242~422℃,不仅温度区间发生偏移且温度范围由112℃拓宽至180℃,增加60.5%。热解过程中混合样的活化能表现为不同程度的升高,CH4、CO_(2)和羰基类化合物等产物的红外吸光度有不同程度的变化。随着MAC制备温度的升高,混合样品的热解结束温度降低,最大失重速率基本不变,活化能由22.77 kJ/mol增至42.17 kJ/mol;掺和MAC400时芳香醛类、CH4的释放量增加,羰基化合物释放量减少,CO_(2)含量在500℃以上出现明显的二次提升;掺和MAC600时芳香醛类、呋喃类、CH4和CO_(2)的释放量减少。随着MAC掺和比例的增加,混合样品的热解结束温度升高,最大失重速率降低,活化能由22.77 kJ/mol增至36.93 kJ/mol。掺和比例为75%时热解释放气体中CO_(2)减少,掺和比例为25%时,含羰基化合物、酸类、呋喃产生量降低。
This study focused on the effects of doping in cyanobacterial biochar on the pyrolysis characteristics and gas products released from the raw material,the mixed samples were investigated by TG-FTIR technique based on Microcystis aeruginosa(MA)as the raw material and the changes of the pyrolysis characteristics and gas products before and after the doping of Microcystis aeruginosa biochar(MAC).The results showed that the main pyrolysis interval of the mixed samples widened from 322-434℃to 242-422℃and shifted,and the activation energy of the mixed samples showed different degrees of increase during the pyrolysis process,the infrared absorbance values of CH4,CO_(2),carbonyl compounds and other products varies in different degrees.With the increase of MAC preparation temperature,the burnout temperature of the mixture decreased,the maximum weight loss rate remained unchanged,and the activation energy increased from 22.77 kJ/mol to 42.17 kJ/mol.The release of aromatic aldehydes and CH4 increases and the release of carbonyl compounds decreases when MAC is blended at 400℃,the CO_(2)content shows a significant secondary increase at temperatures above 500℃.The aromatic aldehydes,furans,CH4 and CO_(2)decreased when MAC was blended at 600℃.As the doping ratio of MAC increased,the burnout temperature of the mixed samples increased,the maximum weight loss rate decreased,and the activation energy increased from 22.77 kJ/mol to 36.93 kJ/mol.The CO_(2)release from the pyrolysis gas decreased when the doping ratio was 75%,and the amount of carbonyl compounds,acids and furans produced decreased when the doping ratio was 25%.
作者
宋卫军
谢妤
陈钱浩
王祎楠
Song Weijun;Xie Yu;Chen Qianhao;Wang Yi’nan(College of Ecological and Resources Engineering,Wuyi University,Wuyishan 354300,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2024年第1期358-365,共8页
Acta Energiae Solaris Sinica
基金
福建省南平市资源化学产业科技创新联合资助项目(N2020Z005)
福建省自然科学基金(2020J01417)
福建省大学生创新性实验项目(S202010397033)。
