Production and use of a premium fuel grade petroleum coke
First Claim
1. A process of producing coke, said process comprising the steps:
- (a) obtaining a coke precursor material derived from carbonaceous origin;
(b) subjecting said coke precursor material to a delayed coking process, said delayed coking process performed for sufficient time and at sufficient temperature and under sufficient pressure so as to promote the production of porous sponge coke; and
(c) adding at least one chemical compound of predetermined quality and predetermined quantity to said porous sponge coke in a coke quenching portion of said delayed coking process;
whereby said at least one chemical compound substantially improves the fuel properties, combustion characteristics, ash characteristics, or environmental impacts of said coke when used in a combustion process.
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Abstract
A premium “fuel-grade” petroleum coke is produced by modifying petroleum coking technology. Coking process parameters are controlled to consistently produce petroleum coke within a predetermined range for volatile combustible material (VCM) content. The invention includes a process of producing a coke fuel, the method comprising steps: (a) obtaining a coke precursor material derived from crude oil and having a volatile organic component; and (b) subjecting the coke precursor material to a thermal cracking process for sufficient time and at sufficient temperature and under sufficient pressure so as to produce a coke product having volatile combustible materials (VCMs) present in an amount in the range of from about 13% to about 50% by weight. Most preferably, the volatile combustible materials in the coke product typically may be in the range of from about 15% to about 30% by weight. The present invention also provides methods for (1) altering the coke crystalline structure, (2) improving the quality of the coke VCM, and (3) reducing the concentration of coke contaminants. Fuels made from the inventive coke product and methods of producing energy through the combustion of such fuels are also included. Finally, novel environmental control techniques are developed to take optimal advantage of the unique characteristics of this upgraded petroleum coke.
165 Citations
20 Claims
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1. A process of producing coke, said process comprising the steps:
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(a) obtaining a coke precursor material derived from carbonaceous origin;
(b) subjecting said coke precursor material to a delayed coking process, said delayed coking process performed for sufficient time and at sufficient temperature and under sufficient pressure so as to promote the production of porous sponge coke; and
(c) adding at least one chemical compound of predetermined quality and predetermined quantity to said porous sponge coke in a coke quenching portion of said delayed coking process;
whereby said at least one chemical compound substantially improves the fuel properties, combustion characteristics, ash characteristics, or environmental impacts of said coke when used in a combustion process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process of making coke, said process comprising:
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(a) providing a coke feed comprising a material derived from carbonaceous origin;
(b) subjecting said coke feed to a delayed coking process, said delayed coking process incorporating a process means to promote the production of coke having increased porosity and improved adsorption characteristics; and
(c) adding at least one chemical compound of predetermined quality and predetermined quantity to said coke in a coke quenching portion of said delayed coking process wherein the increased porosity and improved adsorption characteristics aid in the addition of said at least one chemical compound. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification