Needle Coke Quality - Effect Of Operating Parameters
IR@IIP: CSIR-Indian Institute of Petroleum, Dehradun
View Archive Info| Field | Value | |
| Creator |
Tandon,Deepak
Mondal,P Dang,G.S Kumar,Sanat Sharma,Y.K Garg,M.O |
|
| Date |
2010-07-21T08:53:56Z
2010-07-21T08:53:56Z 2010-07-21T08:53:56Z |
|
| Identifier |
http://hdl.handle.net/123456789/707
|
|
| Description |
Needle coke is a high value product and is obtained through delayed coking process. In India at
present the; delayed coking units are producing only sponge! fuel coke and all the indigenous
requirement of needle coke is being met through imports. Premium grade needle coke production
technology is a closely guarded secret and not easily available from licensors.
Needle coke, which is an essential precursor for the ultra high power graphite electrodes for
electric arc furnaces, is produced by delayed coking. Characteristics like low coefficient of thermal
expansion, high density, high electrical conductivity and low puffing are essentially required in
quality needle coke. Such qualifying characteristics have been recognized to be strongly
influenced by the natute of feedstock and operating! carbonization conditions. Operating
parameters also play an important role in establishing the crystalline structure of needle coke.
Needle coke manufacture is also considered more an art than a science. Efforts are therefore
being made at liP to develop the technology indigenously.
In this paper an attempt has been made to study the effect of variation of process conditions such
as furnace outlet temperature, coke chamber pressure etc on the quality of coke produced during
the delayed coking of an identified feedstock, derived from imported crude oil. The delayed
coking experiments have been conducted at different furnace outlet temperature and coke.
chamber pressure keeping other operating parameters constant. During the studies it has been
found that as furnace outlet temperature increases the gas and liquid yield increases whereas
coke yield decreases. The raw petcoke produced under each experimental condition has been
subjected to qualitative analysis including XRD technique to observe the crystalline structure of
petcoke. Encouraging results have been obtained with the given feedstock under tried operating
conditions. The quality of needle coke obtained under relatively higher operating pressure as well
as using recycle streams is found to be reasonably good.
|
|
| Language |
en_US
|
|
| Subject |
Delayed coking
Needle coke |
|
| Title |
Needle Coke Quality - Effect Of Operating Parameters
|
|
| Type |
Article
|
|