NDLI: Effects of Coke Calcination Level on Pore Structure in Carbon Anodes

Content Provider	Springer Nature Link
Author	Fang, Ning Xue, Jilai Lang, Guanghui Bao, Chongai Gao, Shoulei
Copyright Year	2015
Abstract	Effects of coke calcination levels on pore structure of carbon anodes have been investigated. Bench anodes were prepared by 3 types of cokes with 4 calcination temperatures (800°C, 900°C, 1000°C and 1100°C). The cokes and anodes were characterized using hydrostatic method, air permeability determination, mercury porosimetry, image analysis and confocal microscopy (CSLM). The cokes with different calcination levels are almost the same in L$_{C}$ values (19–20 Å) and real density (1.967–1.985 g/cm$^{3}$), while the anode containing coke calcined at 900°C has the lowest open porosity and air permeability. Pore size distribution (represented by Anode H sample) can be roughly divided into two ranges: small and medium pores in diameter of 10–400 μm and large pores of 400–580 μm. For the anode containing coke calcined at 800°C, a number of long, narrow pores in the pore size range of 400–580 μm are presented among cokes particles. Formation of these elongated pores may be attributed to coke shrinkages during the anode baking process, which may develop cracking in the anode under cell operations. More small or medium rounded pores with pore size range of 10–400 μm emerge in the anodes with coke calcination temperatures of 900°C, 1000°C and 1100°C, which may be generated due to release of volatiles from the carbon anode during baking. For the anode containing coke calcined at 1100°C, it is found that many rounded pores often closely surround large coke particles, which have potential to form elongated, narrow pores.
Starting Page	635
Ending Page	642
Page Count	8
File Format	PDF
ISSN	10474838
Journal	JOM
Volume Number	68
Issue Number	2
e-ISSN	15431851
Language	English
Publisher	Springer US
Publisher Date	2015-12-15
Publisher Institution	The Minerals, Metals & Materials Society (TMS)
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Chemistry/Food Science Physics Environment Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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