高温重整调控木质成型活性炭性能的研究

doi:10.3969/j.issn.0253-2417.2016.03.002

林产化学与工业 ›› 2016, Vol. 36 ›› Issue (3): 9-15.doi: 10.3969/j.issn.0253-2417.2016.03.002

高温重整调控木质成型活性炭性能的研究

许伟, 刘军利, 孙康, 宋曜光

中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏南京 210042

收稿日期:2015-12-29 出版日期:2016-06-25 发布日期:2016-07-07
通讯作者: 刘军利(1974-),男,博士,研究员,从事生物质能源与炭材料的研究开发工作;E-mail:liujunli1974@126.com。 E-mail:liujunli1974@126.com
作者简介:许伟(1988-),男,山东日照人,硕士生,从事炭质吸附材料的制备与应用研究
基金资助:
十二五国家科技支撑计划资助(2015BAD14B06)

Performance of Wooden Molding Activated Carbon by High-temperature Reforming

XU Wei, LIU Jun-li, SUN Kang, SONG Yao-guang

Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SAF;Key lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China

Received:2015-12-29 Online:2016-06-25 Published:2016-07-07

摘要/Abstract

摘要： 为了研究高温重整方法对活性炭性能的影响,以商品磷酸法木质成型活性炭为原料,考察了不同升温/降温方式、重整温度和重整时间对活性炭强度、孔结构、着火点和官能团的影响。结果表明:快速升温至800℃重整活性炭30~75 min后快速降温的方式(快速升温/快速降温(FH/FC))可使活性炭强度提高5.75%~6.39%,得率保持在83.54%以上,比梯度升温/自然降温(GI/ND)更高效节能。对经800℃重整30和60 min后的活性炭的孔结构和吸附性进行研究,发现活性炭的比表面积和总孔容积分别下降约400 m²/g 和0.3 m³/g,孔径分布在1.2 nm以下的微孔所占的比例增加,对亚甲基蓝的吸附性能略有下降,而对碘的吸附性能略有提高,丁烷工作容量下降15%以内。经高温重整后,活性炭的着火点显著提高,800℃重整60 min后,着火点提高100℃以上,这与高温重整后活性炭表面含氧官能团数量的减少有关。

关键词: 活性炭, 强度, 高温重整, 着火点

Abstract: The effect of high-temperature reforming method on the performance of commercial wooden molding activated carbon materials prepared by phosphoric acid activation was studied. The effects of different heating and cooling modes,reforming temperature and reforming time on the strength of activated carbon materials were investigated. The results showed that when the activated carbon were heated to 800℃ by rapid heating-up and reformed for 30-75 min before rapid cooling (fast heating/fast cooling (FH/FC)),the strength of activated carbon increased by 5.75%-6.39% and the yield of activated carbon maintained more than 83.54% which was higher efficiency than that by the method of gradient increased temperature/natural drop (GI/ND) in temperature. The pore structure and adsorption capacity of activated carbon after reforming at 800℃ for 30 and 60 min were also studied. The results showed that the specific surface area and total pore volume of activated carbon decreased by about 400 m²/g and 0.3 m³/g, respectively. The proportion of pores with pore size distribution smaller than 1.2 nm was increased. The adsorption capacity of methylene blue showed a small decrement. The adsorption capacity of iodine was slightly increased. The butane working capacity was decreased less than 15%. After high-temperature reforming,the ignition point of activated carbon significantly was increased. When activated carbon reformed for 60 min at 800℃,its ignition temperature improved by more than 100℃. It mainly related to the reduction of the amount of oxygen functional groups on the surface of activated carbon after high-temperature reforming.

Key words: activated carbon, strength, high-temperature reforming, ignition point

中图分类号:

TQ35
TQ424

许伟, 刘军利, 孙康, 宋曜光. 高温重整调控木质成型活性炭性能的研究[J]. 林产化学与工业, 2016, 36(3): 9-15.

XU Wei, LIU Jun-li, SUN Kang, SONG Yao-guang. Performance of Wooden Molding Activated Carbon by High-temperature Reforming[J]. Chemistry and Industry of Forest Products, 2016, 36(3): 9-15.

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高温重整调控木质成型活性炭性能的研究

Performance of Wooden Molding Activated Carbon by High-temperature Reforming

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