基于水热碳化技术的废弃烟末制备水热炭和碳量子点研究
Preparation of hydrochar and carbon quantum dots from waste tobacco based on hydrothermal carbonization technology
-
摘要:为探索废弃烟末资源化与高值化利用途径,通过水热碳化技术将烟末同时转化为水热炭燃料和碳量子点荧光纳米材料,研究了水热碳化温度和反应时间对水热炭燃烧性能的影响,采用红外光谱、X射线光电子能谱、热重分析等手段表征样品的形貌结构与光学性能。结果表明:随着水热碳化反应强度的加大,水热炭的产率降低,而水热炭的固定碳含量和高位热值呈升高趋势,当反应温度为240℃、时间为2 h时,高位热值达到最高(18.66 MJ/kg);水热炭表面附着有碳微球颗粒,且废弃烟末内纤维素类结构在水热碳化过程中不断被分解破坏;水热炭的燃烧过程可分为三个阶段,其中固定碳燃烧阶段的失重率随水热碳化反应强度加大逐渐增加至31.44%,水热炭的引燃温度和燃烧稳定性均优于烟末原料;所制备的氮掺杂型碳量子点的粒径为2.14~3.02 nm,粒径分布较均匀,贮存稳定性较好;碳量子点在365 nm的紫外激发波长下发射蓝色荧光,且其荧光发射光谱呈现激发光波长依赖性,当水热碳化温度为200℃、反应时间为4 h时,碳量子点的荧光强度最高。Abstract:In order to explore the high-value resource utilization of waste tobacco powder, the hydrothermal carbonization method was employed to simultaneously convert tobacco powder into hydrochar and carbon quantum dot in one-pot manner. The effect of hydrothermal temperature and reaction time on the combustion performance of hydrochar was investigated. The morphology, structure and properties of the samples were characterized by infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis and fluorescence spectroscopy. The results showed that:With the increase of hydrothermal reaction intensity, the yields of hydrochar decreased, while the fixed carbon content and higher heating value increased. When the reaction temperature and time were 240℃ and 2 h respectively, the higher heating value reached to the highest of 18.66 MJ/kg. SEM analysis showed that the degree of fragmentation of hydrochar increased with the increase of reaction intensity, and carbon microsphere particles were attached to its surface. The infrared spectrum confirmed that the cellulose structure in the waste tobacco powder was continuously decomposed and destroyed during the hydrothermal carbonization process. The thermogravimetric analysis of hydrochar indicated that the combustion processes of hydrochar could be divided into three stages. The weight loss during the fixed carbon combustion stage increased to 31.44% with the increase of hydrothermal reaction intensity, and the ignition temperature and combustion stability of the hydrochar were better than that of the raw tobacco powder. The average particle size of the prepared nitrogen-doped carbon quantum dots was around 2.14~3.02 nm. The particle size distribution was relatively uniform. Moreover, the storage stability of carbon dots was relatively good. The carbon quantum dots exibited a blue fluorescence emission under the excitation wavelength of 365 nm. In addition, the fluorescence emission spectrum showed a wavelength dependence of excitation light, and the fluorescence emission intensity of carbon quantum dots produced under hydrothermal temperature of 200℃ for 4 h was the highest.
-
- [1]
王金棒, 刘亚丽, 朱智志, 等.废弃烟叶的非烟草制品专利技术现状分析[J].西南师范大学学报(自然科学版), 2019, 44(12):45-53.
- [2]
王金棒, 邱纪青, 汪志波, 等.烟草源培养基在产品制备领域的研究进展[J].现代化工, 2022, 42(6):30-34
, 39. - [3]
LIANG M, ZHANG K, LEI P, et al.Fuel properties and combustion kinetics of hydrochar derived from co-hydrothermal carbonization of tobacco residues and graphene oxide[J].Biomass Conversion and Biorefinery, 2020, 10(1):189-201.
- [4]
王金棒, 邱纪青, 汪志波, 等.国内外烟蒂资源化利用研究现状与展望[J].轻工学报, 2021, 36(4):63-77.
- [5]
张豪洋, 党炳俊, 金伊楠, 等.烟草废弃物中烟碱生物调控的研究进展[J].环境污染与防治, 2021, 43(6):772-778.
- [6]
LIANG M, LU W J, LEI P, et al.Physical and combustion properties of binder-assisted hydrochar pellets from hydrothermal carbonization of tobacco stem[J].Waste and Biomass Valorization, 2020, 11(11):6369-6382.
- [7]
WU W X, MEI Y F, ZHANG L, et al.Kinetics and reaction chemistry of pyrolysis and combustion of tobacco waste[J].Fuel, 2015, 156:71-80.
- [8]
张文姬, 陈桢禄, 邹明民, 等.烟草资源多元化开发利用潜能[J].广东农业科学, 2021, 48(12):100-110.
- [9]
周国生, 义胜辉, 崔建军, 等.基于生物工程的废次烟叶资源化技术研究[J].中国烟草科学, 2013, 34(1):85-89.
- [10]
CHEN H P, LIN G Y, CHEN Y Q, et al.Biomass pyrolytic polygeneration of tobacco waste:Product characteristics and nitrogen transformation[J].Energy & Fuels, 2016, 30(3):1579-1588.
- [11]
STREZOV V, POPOVIC E, FILKOSKI R V, et al.Assessment of the thermal processing behavior of tobacco waste[J].Energy & Fuels, 2012, 26(9):5930-5935.
- [12]
吴艳姣, 李伟, 吴琼, 等.水热炭的制备、性质及应用[J].化学进展, 2016, 28(1):121-130.
- [13]
SAENGSURIWONG R, ONSREE T, PHROMPHITHAK S, et al. Conversion of tobacco processing waste to biocrude oil via hydrothermal liquefaction in a multiple batch reactor[J].Clean Technologies and Environmental Policy, 2023, 25:397-407.
- [14]
许利娜, 杨小华, 丁海阳, 等.生物基N, S双掺杂荧光碳点的制备及其应用[J].高校化学工程学报, 2019, 33(4):951-956.
- [15]
AI L, YANG Y S, WANG B Y, et al.Insights into photoluminescence mechanisms of carbon dots:Advances and perspectives[J].Science Bulletin, 2021, 66(8):839-856.
- [16]
岳晓月, 李妍, 周子君, 等.荧光传感分析法在抗生素残留检测中的应用研究进展[J].轻工学报, 2022, 37(4):41-48
, 57. - [17]
王士鹏, 董娅慧, 赵浩然, 等.生物质基碳点制备及应用研究进展[J].发光学报, 2022, 43(6):833-850.
- [18]
张美慧, 廖璟, 唐玉莲.稻谷壳合成生物质碳点及其荧光性质研究[J].化学世界, 2021, 62(3):165-170.
- [19]
LIANG Y M, YANG H, ZHOU B, et al.Waste tobacco leaves derived carbon dots for tetracycline detection:Improving quantitative accuracy with the aid of chemometric model[J].Analytica Chimica Acta, 2022, 1191:339269.
- [20]
YANG H, WEI Y L, YAN X F, et al.High-efficiency utilization of waste tobacco stems to synthesize novel biomass-based carbon dots for precise detection of tetracycline antibiotic residues[J].Nanomaterials, 2022, 12(18):3241.
- [21]
GARCÍA R, PIZARRO C, LAVÍN A G, et al.Biomass proximate analysis using thermogravimetry[J].Bioresource Technology, 2013, 139:1-4.
- [22]
PARIKH J, CHANNIWALA S A, GHOSAL G K.A correlation for calculating HHV from proximate analysis of solid fuels[J].Fuel, 2005, 84(5):487-494.
- [23]
王安然, 蔡斌, 付丽丽, 等.典型雪茄烟叶热解/燃烧特性及动力学分析[J].烟草科技, 2021, 54(6):75-82.
- [24]
周思邈, 韩鲁佳, 杨增玲, 等.碳化温度对畜禽粪便水热炭燃烧特性的影响[J].农业工程学报, 2017, 33(23):233-240.
- [25]
WANG C P, WANG F Y, YANG Q R, et al.Thermogravimetric studies of the behavior of wheat straw with added coal during combustion[J].Biomass and Bioenergy, 2009, 33(1):50-56.
- [26]
SEVILLA M, FUERTES A B.The production of carbon materials by hydrothermal carbonization of cellulose[J].Carbon, 2009, 47(9):2281-2289.
- [27]
JING S S, ZHAO Y S, SUN R C, et al.Facile and high-yield synthesis of carbon quantum dots from biomass-derived carbons at mild condition[J].ACS Sustainable Chemistry & Engineering, 2019, 7(8):7833-7843.
- [1]
-

计量
- PDF下载量:12
- 文章访问数:2357
- 引证文献数:0