Activated Carbon from Lignin-based Black Liquor Coagulated by Polyaluminium Chloride
Activated Carbon from Lignin-based Black Liquor Coagulated by Polyaluminium Chloride
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DOI：
10.1016/j.proche.2015.12.041
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
F. Amriani;Vera Barlianti;Muryanto;A. A. Sari-A.
中科院分区：
文献类型：
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作者：
F. Amriani;Vera Barlianti;Muryanto;A. A. Sari-A.
采用聚合氯化铝(PACl)对生物乙醇厂前处理黑液进行混凝。通过不同的PACl投加量对最佳污泥进行评价。在此基础上，采用物理活化法将混凝后的污泥制备成活性碳。制备方法有两种：一步活化法和两步活化法。在一步活化中，黑液干泥直接在575̊C下活化3h，在两步活化中，干泥在575̊C下炭化3h，然后在725̊C升温活化1h，研究了木质素PACl基单步活化和两步活化的性能，包括比表面积和峰成分分析。结果表明，在黑液中加入质量分数为1%(w/v)的PACl，以200转/分的速度恒速搅拌10分钟，然后以50转/分的速度缓慢搅拌2小时，再沉淀24小时，可获得最佳的混凝效果。结果表明，基于LPACl的AC1比基于LPACl的AC2具有更高的比表面积(SBET)。为进一步研究利用黑液生产活性碳以建立可持续的循环利用工艺，对影响工艺参数进行了初步研究，从而支持了环境和实用价值。
Black liquor obtained from the pretreatment process in bioethanol plant was coagulated byPolyaluminium Chloride(PACl). The optimum sludge was evaluated by varying PACl dosage. Further, the sludge from coagulation process was prepared for activated carbon with the physical activation process. The preparation was carried out with two different methods: single step activation and two-step activation. In single step activation, dried sludge of black liquor were activated directly using the furnace at 575̊C for 3 h. In two-step activation, dried sludge was carbonized at 575̊C for 3 h and subsequently activated with raised temperature at 725̊C for 1 h. Investigated properties of lignin PACl-based activated carbon in single (LPACl-based AC 1) and two-step activation (LPACl-based AC 2) in the present study included its surface area and peak component analysis. It was found that PACl 1% (w/v) dosage addition to black liquor in constant speed 200 rpm for 10 minutes followed by slow stirring process 50 rpm for 2 hours and 24 hours settlement served optimum coagulation behaviour to deliver precipitation. Surface area (SBET) of LPACl-based AC 1 was found higher than LPACl-based AC 2. This preliminary study was conducted to evaluate influence process variable for the further study of activated carbon production as utilization of black liquor to establish sustainable recycling process, consequently supported the environmental and practical value.