caa a22 4500 606194878 CHVBK 20210128100916.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10934-015-0035-5 doi (NATIONALLICENCE)springer-10.1007/s10934-015-0035-5 Preparation of high specific surface area activated carbon from walnut shells by microwave-induced KOH activation [Elektronische Daten] [Song cheng, Libo Zhang, Hongying Xia, Jinhui Peng, Shengzhou Zhang, Shixing Wang] We prepared activated carbon with high specific surface area from walnut shells by chemical activation with KOH and microwave heating. To optimize the preparation process, we applied the response surface methodology technique. We then investigated the influences of microwave power, activation time, and KOH/C weight ratio on the yield and iodine adsorption capacity of the activated carbon. The results revealed that the optimum conditions were: microwave power 700W, activation time 20min, and KOH/C weight ratio 4, corresponding to a yield of 40% and an iodine number of 2558mg/g. The pore structure parameters of the activated carbon, i.e., Brunauer-Emmett-Teller surface area, total pore volume, and average pore diameter, were estimated to be 3923m2/g, 2.778ml/g, and 2.32nm, respectively, under optimum conditions. The activated carbon and char were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. FTIR showed that the chemical groups of the activated carbon had changed, and SEM revealed that the activated carbon had lots of small, irregular pores on its surface. The inner structure of the activated carbon under the optimum preparation conditions is viewed by the TEM. Springer Science+Business Media New York, 2015 Activated carbon nationallicence Response surface methodology nationallicence Microwave heating nationallicence High specific surface area nationallicence cheng Song State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Zhang Libo State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Xia Hongying State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Peng Jinhui State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Zhang Shengzhou State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Wang Shixing State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/6(2015-12-01), 1527-1537 1380-2224 22:6<1527 2015 22 10934 https://doi.org/10.1007/s10934-015-0035-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-0035-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- cheng Song State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 700 1- Zhang Libo State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 700 1- Xia Hongying State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 700 1- Peng Jinhui State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 700 1- Zhang Shengzhou State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 700 1- Wang Shixing State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, Kunming, Yunnan, China aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/6(2015-12-01), 1527-1537 1380-2224 22:6<1527 2015 22 10934