www.eiribooksandprojectreports.com 1
ENGINEERS INDIA RESEARCH INSTITUTE
4/54, Roop Nagar, Delhi-110007 (India)
Phone: 9289151047, 9811437895, 9811151047
E-mail:
[email protected]
Website: www.eiriindia.org
CALCINED PETROLEUM COKE (CPC)
PRODUCTION RATE – 24,000 TPA
[EIRI/EDPR/4742] J.C.: 2962XL
Coke
Coke is a fuel with few impurities and high carbon content, usually made from
coal. It is the solid carbonaceous material derived from destructive distillation of
low-ash, low-sulphur bituminous coal. Cokes made from coal are grey, hard, and
porous. While coke can be formed naturally, the commonly used form is synthetic.
The form known as petroleum coke, or pet coke, is derived from oil refinery coker
units or other cracking processes.
Coke is used in preparation of producer gas which is a mixture of carbon
monoxide (CO) and nitrogen (N2). Producer gas is produced by passing air over
red-hot coke. Coke is also used to manufacture water gas.
Petroleum Coke
Petroleum coke (often abbreviated pet coke or petcoke) is a carbonaceous solid
delivered from oil refinery coker units or other cracking processes. Coking
processes that can be employed for making petcoke include contact coking, fluid
coking, flexicoking and delayed coking. Other coke has traditionally been delivered
from coal.
This coke can either be fuel grade (high in sulfur and metals) or anode grade (low
in sulfur and metals). The raw coke directly out of the coker is often referred to as
green coke. In this context, “green” means unprocessed. The further processing of
green coke by calcining in a rotary kiln removes residual volatile hydrocarbons
from the coke. The calcined petroleum coke can be further processed in an anode
baking oven in order to produce anode coke of the desired shape and physical
properties. The anodes are mainly used in the aluminium and steel industry.