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

不同热解温度下番茄藤蔓生物炭的理化特性分析

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

Analysis of physicochemical properties of tomato vine biochar under different pyrolysis 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。方法通过 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表征、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值范围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 Biochar utilization is a new direction of straw resource utilization and one of the ten modes of straw agricultural utilization. In order to explore the effect of pyrolysis temperature on tomato vine biochar. Methods Biochar was prepared by pyrolysis at 300 °C, 500 °C and 700 °C for 2 h. The surface structure, elements characteristics, surface functional groups of tomato vine biochar were comprehensively analyzed by means of electron microscope scanning, elemental analyzer and fourier transform infrared spectrometer. Results The results showed that the tomato vine biochar prepared by pyrolysis method was alkaline ( pH range 9.83-10.67 ). The yield of biochar decreased with the increase of pyrolysis temperature, while the ash content was the opposite. The total nitrogen content was the lowest at 500 °C, and the highest at 300 °C, but the fixed carbon content and C / N ratio were relatively high at 500 °C, which were 51.42 % and 36.63, respectively. The pore structure of tomato vine biochar was rich at low temperature pyrolysis. At high temperature pyrolysis, the pores were covered by ash and its molten structure, and the porosity decreased. With the increase of pyrolysis temperature, the degree of aromatization of biochar increased. Compared with 300 °C and 500 °C, the absorption peak of Fourier transform infrared spectroscopy at 700 °C decreased, especially in 500 ～ 800 cm⁻¹. Conclusion Pyrolysis changed the physical and chemical properties and microstructure of tomato vine biochar. Considering all factors, tomato biochar prepared by pyrolysis at 300-500 °C for 2 h had better performance and higher benefits.
- 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 biochars derived from tomato vine 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. The functional-group distribution of biochars produced by tomato vine

下载: 全尺寸图片幻灯片

表 1 不同热解温度下制备的番茄藤蔓生物炭特征参数

Table 1. Characteristics of biochars from tomato vine under different pyrolytic temperatures

热解温度	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比 C/N ration	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）。 Different lowercase letters after the same line of numbers indicate significant differences between different processing（P＜0.05）.

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