01811 Gasification of coal

01811 Gasification of coal

03 Gaseous fuels (derived gaseous fuels) realized, the substitution of the conventional wet quenching method with a coke dry cooling is the most techn...

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03 Gaseous fuels (derived gaseous fuels) realized, the substitution of the conventional wet quenching method with a coke dry cooling is the most technically and economically convenient. The aim of this paper is mainly a review of the main types of coke dry cooling plants and a detailed examination of the influence of some parameters, particularly of temperature and pressure of the produced steam, and on the exergy efficiency of these plants.

Evaluation of the coking characteristics of lean coals 00101810 D’yachenko, Y. V. Koks K/rim., 1998. (I l-12) 1 l-13. (In Russian) The coking characteristics of lean coals are evaluated with the Roga method without the addition of anthracite. 00/01811

Gasification of coal

Davey, W. L. E. PCT Int. Appl. WO 99 25,792 (Cl. ClOJ3/46), 27 May 1999, ZA Appl. 98/1,385, 19 Feb 1998. 35. The gasification of coal is presented. The initial step in the process involves pneumatically conveying pulverized coal along a coal feed line, and feeding the pneumatically conveyed pulverized coal into a gasification chamber through a burner connected to the coal feed line. Simultaneously, a oxygencontaining gasification agent, is fed into the gasification chamber via the burner. The pulverized coal is gasified by allowing it to burn with a less than stoichiometric amount of oxygen inside the gasification chamber at substantially atmospheric pressure to form a hot gaseous component consisting of carbon monoxide and hydrogen. The gaseous component is withdrawn from the gasification chamber as a gaseous product comprising carbon monoxide and hydrogen. From the bottom of the gasification chamber, slag can be withdrawn.

00101812 Hydrogen recovery from coke oven gas using a layered-column PSA process Yang, J. Ft~mltun. Athwpt., [Confl]. 61/r. 199X. 897-902. Experimental and theoretical investigations were carried out on two-bed PSA processes using two single or double layered beds, in order to recover Ha from coke oven gas. A comparison was made between the two processes with and without a backfill step. In a layered bed PSA, the seven-step PSA process with a backfill step improved the purity of the product. These PSA processes were simulated with a dynamic model incorporating mass, energy and momentum balances. Simulation was used to predict the concentration profiles and they showed that CO and N2 played a significant role in obtaining high product purity. The temperature profiles were measured experimentally and agreed well with simulated results. 00/01813 Improvement in coke quality - some approaches Mitra, P. K. Fuel Sri. Techno/.. 1997. 16. (2). 63-69. This paper presents three different approaches used in improving the quality of coke. First, modern sole heated non-recovery ovens, second, solvent refined coal in the coking blend as an additive, and third, low volatile coals of Jharia coalfield.

00/01814 Influence of some geological and technical conditions on coal-bed methane production in Poland

A hydrogen sulfide-containing gas generated by desulfurization of a gas produced by coal gasification is burned while using an oxygenated gas. An apparatus for burning the HzS-containing gas comprises a pipe for supplying air for burning and a pipe connected with the former pipe for diluting a gas containing oxygen at lower concentration. Alternatively. the apparatus comprises a pipe for supplying the H&containing gas and a pipe connected with the former for supplying the diluting gas. H2S is burned to SOz, which can easily be removed by a limestone-gypsum desulfurization apparatus, while unburned H$ and SO7 generation is suppressed.

00/01818 Method and apparatus for gasification of carbonaceous compounds Yanome, S. and Tanaka, E. Jpn. Kokai Tokkyo Koho JP I I 106,759 (99 106,759 (Cl. ClOJ3146). 20 Apr 1999, Appl. 97/266,608, 30 Sep 1997. 7. (In Japanese) The focus of this paper is on a method and apparatus for the gasification of carbonaceous compounds such as coal: for an integrated coal gasification combined cycle (IGCC) power generation system. The apparatus comprises of a burner, a gasifier. a mixing tank for mixing an oxidizing agent (O? gas) and water, a heating device for heating the water inside the mixing tank and a supply pipe that feeds the mixed gas of the oxidizing agent and steam generated in the mixing tank to the burner.

00/01819

Method for charging dry coal into coke oven

Konda, T. and Kunimasa, H. Jpn. Kokai Tokkyo Koho JP I I 116,969 [9Y 116.9691 (Cl. ClOB57/04), 27 Apr 1999, Appl. 971285636, I7 Ott 1997. 5. (In Japanese) The method for charging dry coal into coke ovens is presented. The procedure involves the drying of pulverized raw material coal and then separating that into fine coal powder and coarse coal powder, mixing the separated fine coal powder with the pulverized raw material coal. adding binder and further mixing to produce a mixture containing lumps and combining the ‘lumpy’ mixture with the formerly separated coarse coal powder and charging mto coke oven. It is suitable to manufacture coke that can be used in blast furnaces with this method.

00/01820 ovens

Method for pre-reduction of iron ore with coal in coke

Greul, A. R. Ger. Offen. DE 19,753.142 (Cl. C2lBl3/00), 6 May I9YY, DE Appl. 19,748,403, 3 Nov 1997. 2. (In German) There are three steps involved in the method for pre-reduction of iron ore with coal in coke ovens. First, a mixture of coal. iron ore fines and additives is fed into an inclined or vertical coke oven chamber. Second, the mixture is heated in the absence of air at ~IlOtlC, and third the resulting iron sponge-coke mixture is discharged into an intermediate hunker in the absence of air and then discharged directly into a converter-like vessel which is bottom-blown with oxygen-enriched air.

OOIO1821 Method of processing of gas liquor generated from coke oven gas in manufacture of coke

Rychlicki, S. Prot. Int. Gas Rcs. Cottf., 1998. I. 298-308. This paper presents information on possible ideas of coal-bed methane production in Poland, especially in the Upper Silesian Coal Basin (USCB). As the depth of the USCB increases, the methane content changes, the factors that influence this are discussed. Details about project plans for microfracturing, minifracturing and methane flow simulation through hydraulic fracturing are also provided.

Akai, K. Jpn, Kokai Tokkyo Koho JP I I 104,615 (99 104,6lS] (Cl. CO2FlI 24). 20 Apr 1999, Appl. 97/270,865, 3 Ott 1997. 3. (In Japanese) A method for tar removal from the remaining gas liquor generated from coke-oven gas during coke manufacturing is presented. The procedure involves the passing of the gas liquor to a tar-removal tank. with a supply of inert gas, such as nitrogen into the enclosed tank, the tar fraction is allowed to float in the gas liquor with accompanying gas huhhles. The gas from the upper part of the tank is finally fed to a coke-oven gas treatment system.

00101815 Interrelation between coke reactivity and basic ferrosllicon smelting indexes

00/01822

Strakhov, V. M. Koks Khim., 1998, (11-12). 17-21. (In Russian) In electric arc furnaces. the gasification of coke using carbon dioxide is a good indicator of reactivity in the industrial smelting of 75% Si ferrosilicon. The coke batches with increased gasification reactivity resulted in the smelting with decreased consumption of electric energy as well as an increase in furnace productivity.

00/01823 Methane conversion to syngas over Pt-based electrode in a solid oxide fuel cell reactor

00/01818

Semin, G. L. Appl Cofal.. A. 1999. 181. (I). 131-137. A study of electrocatalytix oxidation of methane over Platinum-based electrode-catalyst in a solid oxide fuel cell reactor CH4. Pt ]0.9ZrOz+O.lYzOs]Pt, air at 800°C and atmospheric pressure. In order to characterize the electrode-catalyst, electron spectroscopy for chemical analysis and scanning electron microscopy techniques were used. The experimental results demonstrate that the platinum-based electrode is an active electrode-catalyst for partial oxidation of methane (in a diluent absence) to syngas, concentration ratio being [Ha]/[CO]w2. Methane conversion and carbon monoxide selectivity attained 97% and 95%, respectively. Under these conditions, the reactor is operated in a similar way to fuel cells and the electrode-catalyst is also stable.

Method and apparatus for burning hydrogen sulfidecontaining gas

00/01817

Takeda, M. Jpn, Kokai Tokkyo Koho JP 11 147,023 [99 147.0231 (Cl. BOlD53/52), 2 Jun 1999, Appl. 1997/317,124, 18 Nov 1997. 7. (In Japanese)

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Fuel and Energy Abstracts July 2000

Methods for evaluation of coking properties of coals

Stuchlik, V. Hum. Li.vrj,. 1999. 54. (I ). 3-Y. (In Czech) Tha coking properties of coal are reviewed. The different types of dilatometers and their application in plants, devices for evaluating the coking properties of coals, problems with old designs of dilatometers and their retrofitting are discussed.

Modeling pyrolysis behavior for international coals

Serio, M. A. Pwpr. S~wp. - Am. Chrm. Ser.. Div. FM,/ C/wm.. 1999. 44. (I ). 153-l 56. The historical development of the FG-DVC (functional group-depolymerization. vapourization, crosslinking) network model for coal devolatilization is reviewed. The FG-DVC model can predict, in addition to the tar and total yield of volatiles. the yields of individual gas species, the distribution of tar molecular weights and the semicoke fluidity. The model can be coupled with a semicoke reactivity model, which can then incorporate the effects of thermally induced annealing on semicoke reactivity. This model is being extended to a range of international coals, instead of simply being used for North American coals.

OOlO1824 Optimization of coking of rammed coal charges Lobov, A. A. K&r Kliirrr.. 1999. I, 1X-23. (In Russian) Presented is the development of a model of coking of rammed charges. Keeping the grain (particle) size and moisture content of the charge consistent, the effects of the content of volatiles. caking propensity, and temperature in heating channels of coke ovens on coke strength characteristics were considered.