Microwave-assisted catalytic hydrothermal carbonization of Laminaria japonica for hydrochars catalyzed and activated by potassium compounds.
Microwave-assisted catalytic hydrothermal carbonization of Laminaria japonica for hydrochars catalyzed and activated by potassium compounds.
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DOI：
10.1016/j.biortech.2021.125835
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发表时间：
2021-08
影响因子：
11.4
通讯作者：
Zhuhong Ding;Lianyi Zhang;H. Mo;Yijun Chen;Xin Hu
中科院分区：
文献类型：
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作者：
Zhuhong Ding;Lianyi Zhang;H. Mo;Yijun Chen;Xin Hu
微波辅助催化水热碳化技术(MA-CHTC)制备藻基碳氢化合物及其应用的研究较少。因此，利用MA-CHTC分别以KH_2PO_4、KCl、K_2CO_3和KOH为酸性、中性和碱性催化剂，成功地从海带制备了氢化焦。对氢焦的物化性质进行了综合表征，包括产率、元素和物相组成、比表面积、官能团和形貌，证实了这些催化剂对加氢焦形成的不同催化作用。铅(II)的吸附动力学和吸附等温线表明，由于催化剂的协同化学活化，大大提高了对铅(II)的吸附容量。因此，在MA-CHTC过程中，通过催化剂的选择，具有协同催化效应和化学活化作用，有利于不同性质的工程加氢裂化产物的量身定制设计。
There are limited investigations describing preparation and application of alga-based hydrochars via microwave–assisted catalytic hydrothermal carbonization (MA-CHTC). Therefore, hydrochars were successfully prepared from macroalgae biomassLaminaria japonicaimpregnated with KH2PO4, KCl, K2CO3, and KOH as acidic, neutral salt, and alkaline catalysts, respectively, via the MA-CHTC. Comprehensive characterization of physicochemical properties of the hydrochars, including yields, elemental and phase composition, specific surface areas, functional groups, and morphology, confirmed different catalytic effects of these catalysts on hydrochar formation. Adsorption kinetics and isotherms of Pb(II) revealed significant improvement of adsorption capacities for Pb(II) due to synergetic chemical activation of the spiked catalysts. Therefore, the synergetic catalytic effects and chemical activation is benefic for tailored design of engineered hydrochars with different properties for special application through selection of catalysts during the MA-CHTC process.