Derivation of oxygen-containing functional groups on biochar under non-oxygen plasma for mercury removal
Derivation of oxygen-containing functional groups on biochar under non-oxygen plasma for mercury removal
复制标题
非氧等离子体下生物炭上含氧官能团的衍生用于除汞
DOI：
10.1016/j.fuel.2020.117879
复制
发表时间：
2020-09
期刊：
影响因子：
7.4
通讯作者：
Pan Wei-Ping
中科院分区：
文献类型：
--
作者：
Zhang Huicong;Wang Tao;Chen Wei-Yin;Zhang Yongsheng;Sun Baomin;Pan Wei-Ping
生物炭在吸附水或氧后进行N2-等离子体处理。测试了所得样品的除汞效率。H2O-热重和O2-程序升温脱附结果表明，生物炭在储存过程中对水和氧都具有吸附能力。吸附水对汞的去除有抑制作用。而等离子体处理后，水分解成含氧活性基团，与生物炭结合形成含氧官能团。所产生的官能团补偿了对汞捕获的抑制。生物炭吸附氧气后，在等离子体下容易烧结，从而降低了除汞性能。等离子体处理吸附了氧的生物炭形成的含氧官能团也提高了汞的去除效率。Hg-程序升温脱附表明，Hg 0可以被生成的含氧官能团氧化形成HgO。相关性分析表明，生物炭在储存过程中从空气中吸附的氧气是在无氧等离子体环境下生成含氧官能团的主要来源。相关系数达0.999。在正常储存期间，吸附剂从空气中吸附的氧可以在等离子体改性工艺期间转化为含氧官能团，从而氧化Hg 0。
Biochar was subjected to N2-plasma treatment after adsorbing water or oxygen. The mercury removal efficiency of the obtained samples was tested. The results of H2O-thermogravimetric and O2-temperature programmed desorption show that biochar had adsorption capacity for both water and oxygen during storage. The adsorbed water exhibited an inhibitory effect on mercury removal. However, after plasma treatment, water decomposed into oxygen-containing active radicals and combined with biochar to form oxygen-containing functional groups. The generated functional groups compensated for the inhibition of mercury capture. After the biochar adsorbed oxygen, the biochar was easily sintered under plasma, thereby reducing the mercury removal performance. The oxygen-containing functional groups formed by plasma treatment of oxygen adsorbed biochar also improved the mercury removal efficiency. Hg-temperature programmed desorption revealed that Hg0could be oxidised by the generated oxygen-containing functional group to form HgO. Correlation analysis showed that the oxygen adsorbed by the biochar from air during storage was the main source of oxygen-containing functional groups generated under a non-oxygen plasma environment. The correlation coefficient was up to 0.999. During normal storage, the oxygen adsorbed by the adsorbent from the air can be converted into oxygen-containing functional groups during the plasma modification process, thereby oxidising Hg0.
登录
查看更多内容
Co-Ce复合氧化物催化剂催化氧化氯乙烯排放
影响因子：
15.1
作者：
Wang Chao;Guo Yanglong;Giroir-Fendler Anne
通讯作者：
Giroir-Fendler Anne
负载型 LaMnOx 氧化物催化剂催化氧化 1,2-二氯丙烷
影响因子：
22.1
作者：
Zhang Chuanhui;Guo Yanglong;Giroir-Fendler Anne
通讯作者：
Giroir-Fendler Anne
影响因子：
16.5
作者：
Guan Naijia
通讯作者：
Guan Naijia
DOI：
--
发表时间：
2014
期刊：
--
影响因子：
--
作者：
A. Majumdar;Sandhan Chandra Das;B. Ghosh;Rainer;Hippler
通讯作者：
A. Majumdar;Sandhan Chandra Das;B. Ghosh;Rainer;Hippler
影响因子：
6
作者：
T. Šoštarić;M. Petrović;F. Pastor;D. Lončarević;J. Petrović;J. Milojković;M. Stojanović
通讯作者：
T. Šoštarić;M. Petrović;F. Pastor;D. Lončarević;J. Petrović;J. Milojković;M. Stojanović