Abstract: Carbon nutshells and hydrolytic lignin were used as starting materials for the preparation of microporous active carbons. Optimum parameters for cedar nutshell carbonization have been selected (temperature of carbonization 700–800 8C, rate of heating less than 3 8C/min) for the preparation of microporous carbons (average pore width 0.56 nm). The textural characteristics of microporous carbons made from nutshell are similar to those of a ‘Coconut’ carbon molecular sieve, but the latter has both a higher CO adsorption capacity and a higher coefficient of N /O separation. The influence of 2 2 2 carbonization and steam-activation parameters on the microtexture and molecular-sieve properties of granular carbons made from hydrolytic lignin was also investigated. A low rate of heating (less 3 8C/min) promotes the formation of micropores with average sizes around 0.56–0.58 nm at carbonization temperature 700 8C. At the same carbonization temperature the average sizes of micropores were 0.7–0.78 nm at rates of heating more than 3 8C/min. The activation of lignin-char with 3 21 steam at 800 8C resulted in the formation of active carbons with more developed micropore volume (0.3–0.35 cm g ) and with micropores of widths around 0.6–0.66 nm which are able to separate He from a He–CH mixture. The size of the 4 micropores was varied as a function of burn off value.

Cite: Baklanova O.N. , Plaksin G.V. , Drozdov V.A. , Duplyakin V.K. , Chesnokov N.V. , Kuznetsov B.N.
Preparation of microporous sorbents from cedar nutshells and hydrolytic lignin
Carbon. 2003. V.41. N9. P.1793-1800. DOI: 10.1016/S0008-6223(03)00149-0 WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	Apr 12, 2001
Accepted:	Mar 25, 2003

Identifiers:

Web of science:	WOS:000183818100011
Scopus:	2-s2.0-0037705620
Elibrary:	13444412
OpenAlex:	W2075770422

Citing:

DB	Citing
Web of science	72
Scopus	77
OpenAlex	77

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