TY - JOUR
T1 - Transformation of mesophase pitch into different carbons by heat treatment and KOH etching
AU - Teng, Hsisheng
AU - Weng, To Chi
N1 - Funding Information:
Financial support from the National Science Council of Taiwan is gratefully acknowledged. The project number is NSC 89-2214-E-006-009. The authors also thank China Steel Chemical Co. for supplying the mesophase pitch used in the present work.
PY - 2001/12/15
Y1 - 2001/12/15
N2 - Carbons with different physical structures were prepared from mesophase pitch powders by heat treatment and KOH etching at temperatures up to 900 °C. The crystallite size of the carbons derived from heat treatment of the pitch was found to be small, and little porosity was created in these carbons. However, high-porosity carbons can be prepared from heat treatment of the pitch that has been impregnated with KOH. The present work has demonstrated that this KOH-etching method can produce carbons with surface areas and pore volumes as high as 2900 m2/g and 1.7 cm3/g, respectively, with high yields of ≈ 30 wt.%. The influence of different parameters during the etching process, such as the etching temperature, residence time and KOH/pitch ratio, on the carbon yield and the surface characteristics has been explored. The porosity of the resulting carbons was found to increase with the etching extent to a maximum and then began to decrease upon further etching. The optimum conditions to produce high-porosity carbons were recommended.
AB - Carbons with different physical structures were prepared from mesophase pitch powders by heat treatment and KOH etching at temperatures up to 900 °C. The crystallite size of the carbons derived from heat treatment of the pitch was found to be small, and little porosity was created in these carbons. However, high-porosity carbons can be prepared from heat treatment of the pitch that has been impregnated with KOH. The present work has demonstrated that this KOH-etching method can produce carbons with surface areas and pore volumes as high as 2900 m2/g and 1.7 cm3/g, respectively, with high yields of ≈ 30 wt.%. The influence of different parameters during the etching process, such as the etching temperature, residence time and KOH/pitch ratio, on the carbon yield and the surface characteristics has been explored. The porosity of the resulting carbons was found to increase with the etching extent to a maximum and then began to decrease upon further etching. The optimum conditions to produce high-porosity carbons were recommended.
UR - http://www.scopus.com/inward/record.url?scp=0035894013&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035894013&partnerID=8YFLogxK
U2 - 10.1016/S1387-1811(01)00434-6
DO - 10.1016/S1387-1811(01)00434-6
M3 - Article
AN - SCOPUS:0035894013
SN - 1387-1811
VL - 50
SP - 53
EP - 60
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1
ER -