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 °C, rate of heating less than 3 °C/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 CO2 adsorption capacity and a higher coefficient of N2/O2 separation. The influence of 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 °C/min) promotes the formation of micropores with average sizes around 0.56–0.58 nm at carbonization temperature 700 °C. At the same carbonization temperature the average sizes of micropores were 0.7–0.78 nm at rates of heating more than 3 °C/min. The activation of lignin-char with steam at 800 °C resulted in the formation of active carbons with more developed micropore volume (0.3–0.35 cm3 g−1) and with micropores of widths around 0.6–0.66 nm which are able to separate He from a He–CH4 mixture. The size of the 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 ANCAN OpenAlex

Dates:

Submitted:	Apr 12, 2001
Published print:	Jan 1, 2003
Accepted:	Mar 25, 2003
Published online:	Jun 14, 2003

Identifiers:

Web of science:	WOS:000183818100011
Scopus:	2-s2.0-0037705620
Elibrary:	13444412
Chemical Abstracts:	2003:462576
Chemical Abstracts (print):	139:293996
OpenAlex:	W2075770422

Citing:

DB	Citing
Web of science	75
Scopus	79
OpenAlex	76

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