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2 edition of Coking pressure and coke structure found in the catalog.

Coking pressure and coke structure

Eleni Psomiadou

Coking pressure and coke structure

by Eleni Psomiadou

  • 80 Want to read
  • 26 Currently reading

Published .
Written in English


Edition Notes

Thesis (M.Phil.) - Loughborough University of Technology, 1993.

Statementby Eleni Psomiadou.
ID Numbers
Open LibraryOL21516458M

Metallurgical coke sounds like a soda beverage, but it's not. It is a refined carbon product made from a special kind of coal. Using extremely high temperatures, coal can purified into coke -- which is then used in the iron and steel making processes. One of the most important steps in the coke-making process is.   The state of the coke ovens at PAO Zaporozhkoks is analyzed. The coking pressure of coal concentrates is classified, and their interaction in binary mixtures is discussed. Prediction and simulation of the coking pressure in coal batch permits extension of battery life.

coking processes: delayed, fluid and flexicoking, the he delayed coke is mostly used. Coke products from a delayed coker are classified as shot, sponge or needle coke depending on their chemical and physical characteristics. Shot coke, almost always solid as fuel is hard, having spherical form and physically produced through. Influence of coking time on expansion pressure and coke quality. Urbana, Ill.: State of Illinois, Dept. of Registration and Education, Division of the State Geological Survey, (OCoLC) Material Type: Government publication, State or province government publication: Document Type: Book: All Authors / Contributors.

Proposed is a method of producing coke for use in the manufacture of iron and steel, in particular foundry coke, by mixing charge coal and about to 10 %, relative to the coal in the water-free and ash-free state, of a binder, and then coking the mixture. The aim is to produce coke with a relatively low reactivity, the highest possible unit density, the highest possible carbon content and. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Pilot-plant coking'tests on coal blends have shown that ex-pansion pressure of coke against the oven wall varies with coking time, but not always in a predictable manner. We concluded that when coals are t o he judged on the basis of these t e s t s, they should be made a t the rate of coking to be used commercially.


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Coking pressure and coke structure by Eleni Psomiadou Download PDF EPUB FB2

J.A. Pajares, M.A. DiezDíez, in Encyclopedia of Analytical Science (Second Edition), Movable Wall Oven. Direct measurement of coking pressure can be obtained in a movable wall oven, which is widely used to estimate coking pressure of a coal and a coking blend.

A characteristic feature of these ovens is that one wall is mounted on Coking pressure and coke structure book such that it can move, or tend to move, away from. James G. Speight PhD, DSc, in High Acid Crudes, Effect of Naphthenic Acids. A coking process is one of several options for resid, heavy oil, and tsar sand bitumen processing.

The function of the coking unit function is to upgrade the heavy feedstock(s) into more valuable liquid products, and heavy sour crudes have significantly higher amounts of vacuum resid in the feed, the coking.

The coke layer is pressed against the oven wall by high coking pressure and the coke cake is prevented from lowering which would result in wider fissures between coke. Goal: The Coking Process: Coking coal evaluation, optimization of blends, coke structure (porous and carbon matrix), coke properties (porosity, mechanical strength, CO2 reactivity), by-products.

8 Wall Pressure in Coke Oven Chambers Outline of the Main Studies on Coking Pressure The Movable-wall Oven at the Centre de Pyrolyse de Marienau Measurements Relating to Coking Pressure Phenomena Analysis of the Coking Pressure Phenomenon Influence of Carbonizing Conditions on Coking Pressure Influence of Nature of ChargeBook Edition: 2.

times of 15 and 17 hours, and the pressure decreased during longer coking times. It was noted also that at the extremely fast coking time of 14 hours a lower pressure was exerted, probably because of the greater shrinkage and cracking of the coke structure taking place at this rapid rate of heating.

provides consulting, technical support, field services, training, and industry conferences to oil refineries around the services include safe unit operation, process optimization, P&ID and HAZOP review, preventive maintenance programs, start-up & commissioning, turnaround support, design, troubleshooting, and best practices.

Coking coals are defined as those coals that on carbonization pass through softening, swelling, and resolidification to coke. One important consideration in selecting a coal blend is that it should not exert a high coke oven wall pressure and should contract sufficiently to allow the coke to be pushed from the oven.

The properties of coke and. coke rate by high levels of injection of carbon via the tuyeres, in particular pulverized coal injection (PCI), the role of coke as a permeable support became greater in importance and so further improvements in coke quality are required.

In such conditions, a decrease in coke rate. By Norm Lieberman, Chemical Engineer Dealing With Shot Coke Shot coke is produced when the ratio of asphaltines in coker feed divided by total coke production exceeds a specific value.

This value depends on factors favoring shot coke production such as: Agitation in coke drum. Salt content of coker feed. Exposure of hot coker feed to oxygen.

The main difficulty in handling a drum of shot coke. Delayed Coking Control Variables Variable Fuel Coke Anode Coke Needle Coke Temperature, °F - - - Pressure, psig 15 typical 18 – 60+ 50 – 90+ Recycle Ratio 0 - 5% typical 0 – 50%+ 60 – %+ Coking Time, hours 9 24 36 •Higher Temp lower coke VCM content •Low Pressure higher liquid yields / lower coke yield.

coke. When demand for coke is low, coking times can be extended to 24 hours for blast furnace coke and to 48 hours for foundry coke. Coking temperatures generally range from ° to °C (° to °F) and are kept on the higher side of the range to produce blast furnace coke.

Air is prevented from. Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.

The unqualified term "coke" usually refers to the product derived from low. Nov. 8, - Women who drink lots of coffee can relax. But those who drink lots of cola may have a problem: high blood pressure. High blood pressure isn't good. It's linked to. Three different coking processes are used in the refineries: delayed coking, fluid coking, and flexi-coking (a variation of fluid coking).

The common objective of the three coking processes is to maximize the yield of distillate products in a refinery by rejecting large quantities of carbon in the residue as solid coke, known as petroleum coke.

the coke quality is determined by the granular structure of the coal, the coking velocity and the dimensions of the furnace chamber. These factors must be taken into consideration in coking practice in order to obtain coke of the desired quality. In the past this was done more or.

GieselerFluidity PlasticRange °C. 58 77 37 75 65 3, 1, 92 10 61 EXPANSIONPRESSUREANDCOKEQUALITY TableContinued PlasticProperties. Coking is the heating of coal in the absence of oxygen to a temperature above °C, to drive off the volatile components of the raw coal, leaving a hard, strong, porous material of high carbon content, called consists almost entirely of porosity gives it a high surface area, which makes it burn faster (as does a sheet of paper versus a wooden log).

Coke Petrography. The carbonization/coking of coals produces cokes that exhibit a variety of microscopic textures whose optical behavior in polarized light aids in their characterization. The word texture relates to the carbons' optical properties, while structure relates to the amount and size of coke.

coking[′kokiŋ] (chemical engineering) Destructive distillation of coal to make coke A process for thermally converting the heavy residual bottoms of crude oil entirely to lower-boiling petroleum products and by-product petroleum coke. Coking an industrial method of processing natural fuels (mainly pit coal) by heating to °–°C in the.

Coke drum bottom head auto unheading operation, two separate incidents, July and Octobertwo injured Front-end operator at the coke pad while drum being cut,one injured Live drum drain line opened up to coke pad, summerfire with no injury. Dead man switch wiring required on all structure actuators.Two Kinds of Coke.

There are two kinds of coke produced by delayed coking of VDR: high-density shot coke, and porous sponge coke. Figure shows the appearances of shot coke consisting of aggregates of ~5 mm diameter spherical particles (resembling buckshots) and sponge coke (with a porous structure resembling a sponge).A coker or coker unit is an oil refinery processing unit that converts the residual oil from the vacuum distillation column into low molecular weight hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum process thermally cracks the long chain hydrocarbon molecules in the residual oil feed into shorter chain molecules leaving behind the excess carbon in the form of.