Activated carbons from golden shower upon different chemical activation methods: Synthesis and characterizations

Autor: Hai Nguyen Tran, Huan-Ping Chao, Sheng-Jie You
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Adsorption Science & Technology, Vol 36 (2018)
Druh dokumentu: article
ISSN: 0263-6174
2048-4038
02636174
DOI: 10.1177/0263617416684837
Popis: Activated carbons (ACs) were synthesized from golden shower (GS) through chemical activation. Two synthesis processes were used: one-stage and two-stage processes. In the one-stage process, GS that was impregnated with K 2 CO 3 was directly pyrolyzed (GSAC), and the two-stage process consisted of (1) pyrolytic or hydrolytic carbonization to produce biochar or hydrochar and (2) subsequent chemical activation was defined as GSBAC and GSHAC, respectively. The activated carbon’s characteristics—thermal stability and textural, physicochemical, structural, and crystal properties—were thoroughly investigated. Results demonstrated that the characteristics of activated carbons strongly depend on the method used for their synthesis. The Brunauer–Emmett–Teller surface area followed the order GSAC (1413 m 2 /g) > GSHAC (1238 m 2 /g) > GSBAC (812 m 2 /g). The existence of acidic groups was determined through Fourier transform infrared spectroscopy and Boehm titration. The excellent adsorptive capacities of the activated carbons were confirmed from the iodine number (1568–2695 mg/g) and methylene number (143–233 mg/g).
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