研究论文
曾淦宁,伍希,艾宁,王家炜,屠美玲,周鸿艳.铜藻基生物炭的水热制备及性能表征[J].环境科学学报,2014,34(2):392-397
铜藻基生物炭的水热制备及性能表征
- Hydrothermal preparation and characterization of biochar from Sargassum Horneri
- 基金项目：浙江省自然科学基金项目（No.LY12D06004）；浙江省科技创新团队项目（No.2011R09012-05）
- 作者
- 单位
- 曾淦宁
- 1. 浙江工业大学海洋学院, 杭州 310014
- 伍希
- 2. 浙江工业大学化学工程学院, 杭州 310014;3. 浙江省生物燃料利用技术研究重点实验室, 杭州 310014
- 艾宁
- 2. 浙江工业大学化学工程学院, 杭州 310014;3. 浙江省生物燃料利用技术研究重点实验室, 杭州 310014
- 王家炜
- 4. 浙江省宁波诺丁汉大学工程学院, 宁波 315100
- 屠美玲
- 2. 浙江工业大学化学工程学院, 杭州 310014
- 周鸿艳
- 2. 浙江工业大学化学工程学院, 杭州 310014;3. 浙江省生物燃料利用技术研究重点实验室, 杭州 310014
- 摘要：以浙江优势大型海藻之一的铜藻为原料，采用水热炭化法制备了生物炭.同时，通过正交法，以碳回收率和得率为指标，考察了反应时间、反应温度及铜藻与去离子水质量比等因素的影响，确定制备水热炭的最佳工艺条件.结果表明，制备铜藻基水热炭的最佳工艺条件为：反应时间2 h，反应温度180 ℃，铜藻与去离子水质量比1/4，在此条件下，水热炭的碳回收率为65.0%，得率为51.4%.元素分析、BET、接触角测定和傅里叶红外表征结果表明，铜藻基水热炭比表面积为26.6 m2·g-1，pH值为4.8，具有较高的O/C和较低的C/N，与干法裂解炭相比，其亲水性更强，且表面具有更为丰富的含氧、含氮官能团，灰分含量更低，得率和碳回收率分别提高了53.4%和33.5%.
- Abstract：Biochars were prepared by hydrothermal carbonization (HTC) of Sargassum Horneri. Orthogonal method was used to determine the optimal preparation conditions, by examining the effect of factors, including the reaction time and temperature, the weight ratio of Sargassum Horneri to deionized water, on the yield of hydrochars and the carbon recovery rate. Results showed that the optimal preparation conditions are reaction time of 2 h, reaction temperature of 180 ℃ and weight ratio of 1/4. Under the optimal conditions, the carbon recovery rate could reach 65.0%, with the yield of 51.4%. The obtained hydrochars were analyzed by element analysis, Brunauer-Emmet-Tller (BET) surface area, pH value, contact angle and FT-IR. The results indicated that the surface area could reach 26.6 m2·g-1, with pH value of 4.8, higher O/C value and lower C/N value. Compared with biochars produced by dry pyrolysis, hydrochars were found to have more hydrophilic surface and oxygen-and nitrogen-containing functional groups, with lower ash content and higher carbon recovery rate. Besides, the yield and the carbon recovery rate of hydrochars increased by 53.4% and 33.5%, respectively.
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