不同热解温度下番茄藤蔓生物炭的理化特性分析

任丽花; 邹秀凤; 黄家庆; 叶菁; 王义祥

doi:10.19303/j.issn.1008-0384.2024.02.012

不同热解温度下番茄藤蔓生物炭的理化特性分析

doi: 10.19303/j.issn.1008-0384.2024.02.012

1.
福建省农业科学院农业质量标准与检测技术研究所/福建省农产品质量安全重点实验室，福建福州　350003
2.
福建省农业科学院资源环境与土壤肥料研究所/福建省红壤山地农业生态过程重点实验室，福建福州　350013

基金项目: 福建省红壤山地农业生态过程重点实验室开放课题（Aephrs-202101）；中央引导地方科技发展专项（2021L3021）；福建省农业高质量发展超越“ 5511”协同创新工程项目（XTCXGC2021010）

详细信息

作者简介:
任丽花（1977 —），女，博士，助理研究员，主要从事环境微生物、农业环境与生态修复方面的研究，E-mail：1272547936@qq.com

通讯作者:
王义祥（1978 —），男，博士，研究员，主要从事农业废弃物资源化利用研究，E-mail：sd_wolong@163.com

中图分类号: TS959.2; S641.2
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出版历程
- 收稿日期: 2023-10-09
- 录用日期: 2024-02-05
- 修回日期: 2023-12-11
- 网络出版日期: 2024-03-28
- 刊出日期: 2024-02-28

Physicochemical Properties of Tomato Vine Biochar Prepared by Different Pyrolytic Temperatures

1.
Institute of Agricultural Quality Standards and Testing Technology Research, Fujian Academy of Agricultural Sciences/Fujian Key Laboratory of Agro-products Quality & Safety, Fuzhou, Fujian　350003, China
2.
Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences/Fujian Key Laboratory of Agricultural Ecological Process of Red Soil Mountain, Fuzhou, Fujian 350013　China

摘要

摘要: 目的探究裂解温度对番茄藤蔓生物炭理化特性的影响。方法 300 ℃、500 ℃ 和 700 ℃下热解2 h制备生物炭，运用电镜扫描、元素分析仪和傅里叶变换红外光谱分析仪等手段，对番茄藤蔓生物炭的表面结构特征、元素及其他特性、表面官能团等进行综合分析。结果裂解法制备的番茄藤蔓生物炭呈碱性（pH值9.83～10.67），生物炭产率随裂解温度的升高而降低，灰分则相反。全氮含量以500 ℃时最低，300 ℃时最高，但固定碳含量、碳氮比（C/N比）均在500 ℃时含量相对较高，分别为51.42%和36.63。低温裂解时番茄藤蔓生物炭孔隙结构丰富，高温下裂解其孔隙被灰分及其熔融结构覆盖，孔隙度减小。热解温度的升高同时使生物炭芳香化程度增强，700 ℃高温热解时的傅里叶红外光谱图相较于300 ℃和500 ℃谱图吸收峰减少，尤其在500～800 cm⁻¹的吸收峰明显减弱。结论热裂解改变了番茄藤蔓生物炭的理化特性和微观结构，综合考虑各因素，300～500 ℃下裂解2 h制备的番茄生物炭具有较好的性能和较高的效益。
- 生物炭 /
- 番茄藤蔓 /
- 热解温度 /
- 表面结构
Abstract: Objective Effect of processing temperature in pyrolysis of discarded tomato vines on the physiochemical properties of the resulting biochar was studied. Methods Biochar of waste tomato vines were prepared under the pyrolytic temperatures of 300 ℃, 500 ℃, and 700 ℃ for 2h. Surface characteristics, element, and functional groups of the biochar were examined by means of electron microscope scanning, elemental analysis, and Fourier transform infrared spectrometer. Results The biochar prepared under different pyrolytic temperatures had a pH ranging 9.83-10.67. High process temperature reduced the yield but increased the ash content of the biochar. At 500 ℃, the biochar had the least amount of total nitrogen, but the highest at 300 ℃. At 500 ℃, the fixed carbon content peaked at 51.42%, and the C/N ratio at 36.63. More pores appeared on the biochar made by a lower than a higher temperature, under which ash and/or molten elements tended to cover the surface reducing the porosity. A high pyrolytic temperature, comparing 700 ℃ to 300 ℃ or 500 ℃, also raised the aromatization, as shown by the declined Fourier transform infrared spectroscopy spectrum absorption, especially at 500-800cm⁻¹ region. Conclusion The temperature applied in pyrolysis affected the physics, chemistry, and microstructure of the tomato vine biochar. Overall, a pyrolysis process of 300-500 ℃ for 2 h appeared to deliver desirable results.
- Biochar /
- tomato vine /
- pyrolysis temperature /
- surface structure

HTML全文

图 1 不同热解温度下制备的番茄藤蔓生物炭的形态结构扫描照片

Figure 1. SEM images of biochar prepared under different pyrolytic temperatures

下载: 全尺寸图片幻灯片

图 2 番茄藤蔓生物炭的功能基团分布

Figure 2. Distribution of functional groups on biochar

下载: 全尺寸图片幻灯片

表 1 不同热解温度下番茄藤蔓生物炭的产率和理化性质

Table 1. Productivity and physicochemical properties of tomato vine biochar prepared under different pyrolytic temperatures

产率和理化性质 Productivity and physicochemical properties	热解温度 Pyrolytic temperature
产率和理化性质 Productivity and physicochemical properties	300 ℃	500 ℃	700 ℃
产率 Productivity/%	46.19±0.26 a	34.11±0.95 b	29.00±0.10 c
灰分 Ash content/%	18.37±0.86 c	21.53±0.62 b	27.58±0.61 a
挥发分 Volatile/%	36.68±0.98 a	27.05±2.33 b	27.87±0.57 b
pH值 pH value	9.83±0.07 c	10.67±0.03 a	10.03±0.06 b
电导率 Electrical conductivity/(µS·cm⁻¹)	11.02±0.04 c	11.90±0.06 a	11.48±0.05 b
全氮 Total nitrogen/%	1.91±0.01 a	1.63±0.01 c	1.85±0.01 b
固定碳 Fixed carbon/%	44.94±1.33 b	51.42±2.81 a	44.54±1.03 b
有机碳 Organic carbon/%	59.94±0.34 a	59.71±0.39 a	56.51±0.00 b
C/N	31.38±0.05 b	36.63±0.23 a	30.57±0.19 c
同行数字后不同小写字母表示不同处理之间差异显著（P＜0.05）。 Data with different lowercase letters on the same row indicate significant differences (P＜0.05).

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