PDF(Pubmed)
Abstract：
Every late autumn, fluttering poplar leaves scatter throughout the campus and city streets. In this work, poplar leaves were used as the raw material, while H3PO4 and KOH were used as activators and urea was used as the nitrogen source to prepare biomass based-activated carbons (ACs) to capture CO2. The pore structures, functional groups and morphology, and desorption performance of the prepared ACs were characterized; the CO2 adsorption, regeneration, and kinetics were also evaluated. The results showed that H3PO4 and urea obviously promoted the development of pore structures and pyrrole nitrogen (N-5), while KOH and urea were more conductive to the formation of hydroxyl (-OH) and ether (C-O) functional groups. At optimal operating conditions, the CO2 adsorption capacity of H3PO4- and KOH-activated poplar leaves after urea treatment reached 4.07 and 3.85 mmol/g, respectively, at room temperature; both showed stable regenerative behaviour after ten adsorption-desorption cycles.
摘要：
每到深秋,飘扬的杨树叶子散落在校园和城市街道上。在这项工作中,以杨树叶为原料,而H3PO4和KOH用作活化剂并且尿素用作氮源来制备基于生物质的活性炭(AC)以捕获CO2。孔隙结构,官能团和形态学，和解吸性能的制备ACs进行了表征;CO2吸附,再生,和动力学也进行了评估。结果表明，H3PO4和尿素明显促进孔结构和吡咯氮（N-5）的发育，而KOH和尿素更有利于羟基(-OH)和醚(C-O)官能团的形成。在最佳操作条件下，H3PO4和KOH活化杨树经尿素处理后对CO2的吸附量分别达到4.07和3.85mmol/g,分别,在室温下；经过十个吸附-解吸循环后，两者均显示出稳定的再生行为。
