Optimization of hydrodynamic operating conditions of alkaline adsorbers of carbon dioxide in fine purification of coke oven gas

PurposeThe purpose of this paper is to investigate the performance of coke oven gas (COG)-combined cooling, heating and power (CCHP) system and to mainly focus on studying the influence of the environmental conditions, operating conditions and gas conditions on the performance of the system and on quantifying the distribution of useful energy loss and the saving potential of the integrated system changing with different parameters.Design/methodology/approachThe working process of COG-CCHP was simulated through the establishment of system flow and thermal analysis mathematical model. Using exergy analysis method, the COG-CCHP system’s energy consumption status and the performance changing rules were analyzed.FindingsThe results showed that the combustion chamber has the largest exergy loss among the thermal equipments. Reducing the environmental temperature and pressure can improve the entire system’s reasonable degree of energy. Higher temperature and pressure improved the system’s perfection degree of energy use. Relatively high level of hydrogen and low content of water in COG and an optimal range of CH4volume fraction between 35 per cent and 46 per cent are required to ensure high exergy efficiency of this integration system.Originality/valueThis paper proposed a CCHP system with the utilization of coke oven gas (COG) and quantified the distribution of useful energy loss and the saving potential of the integrated system under different environmental, operating and gas conditions. The weak links of energy consumption within the system were analyzed, and the characteristics of COG in this way of using were illustrated. This study can provide certain guiding basis for further research and development of the CCHP system performance.

Download Full-text

Experimental Study of the Reforming of Methane with Carbon Dioxide over Coal Char

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1629 ◽

2008 ◽

Vol 6 (1) ◽

Author(s):

Yanbing Li ◽

Rui Xiao ◽

Baosheng Jin ◽

Huiyan Zhang

Keyword(s):

Carbon Dioxide ◽

Flow Rate ◽

Fixed Bed ◽

Coke Oven ◽

Fixed Bed Reactor ◽

Internal Diameter ◽

Generation System ◽

Coke Oven Gas ◽

Surface Areas ◽

Conversion Of Methane

As one of the fundamental issues of the new poly-generation system on the basis of gasification gas and coke oven gas, carbon dioxide reforming of methane experiments have been performed over coal chars derived from different parent coals in a lab-scale fixed-bed reactor (internal diameter 12 mm, length 700 mm). The char derived from TongChuan coal exhibited higher activity than other samples employed under the same conditions. After the reforming reaction, the char samples were covered with different amounts of carbon deposition which resulted in the surface areas decrease. As the flow rate of feed gas increased from 200 ml/min to 600 ml/min over the Xuzhou char sample at 1050 degrees Celsius, the conversion of methane decreased from 52.7% to 17.5% and the H2 /CO dropped from 0.75 to 0.55. While maintaining the flow rate of CO2 at 20ml/min at 1050 degrees Celsius, the mole ratio of reactants CH4/CO2 was varied from 1 to 1.75 which led to the H2/CO ratio increase from 0.75 to 1.2.

Download Full-text

Use of Four-Electrode Conductometry for the Automatic Determination of Carbon Dioxide and Ammonia in Concentrated Scrubbing Water of Coke Oven Gas

Analytical Chemistry ◽

10.1021/ac60170a010 ◽

1961 ◽

Vol 33 (2) ◽

pp. 199-203 ◽

Cited By ~ 6

Author(s):

Embrecht. Barendrecht ◽

N. G. L. M. Janssen

Keyword(s):

Carbon Dioxide ◽

Coke Oven ◽

Coke Oven Gas ◽

Automatic Determination

Download Full-text

Effect of support materials and Ni loading on catalytic performance for carbon dioxide reforming of coke oven gas

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2019.01.269 ◽

2019 ◽

Vol 44 (16) ◽

pp. 8233-8242 ◽

Cited By ~ 4

Author(s):

Hak-Min Kim ◽

Beom-Jun Kim ◽

Won-Jun Jang ◽

Jae-Oh Shim ◽

Kyung-Won Jeon ◽

...

Keyword(s):

Carbon Dioxide ◽

Coke Oven ◽

Catalytic Performance ◽

Coke Oven Gas ◽

Carbon Dioxide Reforming ◽

Support Materials ◽

Effect Of Support

Download Full-text

Operating Experience of Ansaldo V94.2 K Gas Turbine Fed by Steelworks Gas

Volume 1: Turbo Expo 2002 ◽

10.1115/gt2002-30014 ◽

2002 ◽

Cited By ~ 3

Author(s):

Federico Bonzani ◽

Giacomo Pollarolo ◽

Franco Rocca

Keyword(s):

Blast Furnace ◽

Natural Gas ◽

Gas Turbine ◽

Operating Experience ◽

Coke Oven ◽

Operating Conditions ◽

Total Power ◽

Dual Fuel ◽

Coke Oven Gas ◽

Blast Furnace Gas

ANSALDO ENERGIA S.p.A. has been commissioned by ELETTRA GLT S.p.A, a company located in Trieste, Italy for the realisation of a combined cycle plant where all the main components (gas turbine, steam turbine, generator and heat recovery steam generator) are provided by ANSALDO ENERGIA. The total power output of the plant is 180 MW. The gas turbine is a V94.2 K model gas turbine dual fuel (natural gas and steelworks process gas), where the fuel used as main fuel is composed by a mixture of natural gas, blast furnace gas and coke oven gas in variable proportions according to the different working conditions of the steel work plant. The main features adopted to burn such a kind of variability of fuels are reported below: • fuel as by product of steel making factory gas (coke oven gas “COG”, blast furnace gas “BFG”) with natural gas integration; • modified compressor from standard V94.2, since no air extraction is foreseen; • dual fuel burner realised based on Siemens design. This paper describes the operating experience achieved on the gas turbine, focusing on the main critical aspect to be overcome and on to the test results during the commissioning and the early operating phase. The successful performances carried out have been showing a high flexibility in burning with stable combustion a very different fuel compositions with low emissions measured all operating conditions.

Download Full-text

Techno-Economic and Carbon Footprint Analyses of a Coke Oven Gas Reuse Process for Methanol Production

Processes ◽

10.3390/pr9061042 ◽

2021 ◽

Vol 9 (6) ◽

pp. 1042

Author(s):

Jean-François Portha ◽

Wilmar Uribe-Soto ◽

Jean-Marc Commenge ◽

Solène Valentin ◽

Laurent Falk

Keyword(s):

Carbon Dioxide ◽

Carbon Footprint ◽

Environmental Sustainability ◽

Computer Aided Design ◽

Carbon Dioxide Capture ◽

Coke Oven ◽

Production Costs ◽

Flue Gases ◽

Coke Oven Gas ◽

Methanol Production

This paper focuses on the best way to produce methanol by Coke Oven Gas (COG) conversion and by carbon dioxide capture. The COG, produced in steelworks and coking plants, is an interesting source of hydrogen that can be used to hydrogenate carbon dioxide, recovered from flue gases, into methanol. The architecture of the reuse process is developed and the different process units are compared by considering a hierarchical decomposition. Two case studies are selected, process units are modelled, and flowsheets are simulated using computer-aided design software. A factorial techno-economic analysis is performed together with a preliminary carbon balance to evaluate the economic reliability and the environmental sustainability of the proposed solutions. The production costs of methanol are equal to 228 and 268 €/ton for process configurations involving, respectively, a combined methane reforming of COG and a direct COG separation to recover hydrogen. This cost is slightly higher than the current price of methanol on the market (about 204 €/ton for a process located in the USA in 2013). Besides, the second case study shows an interesting reduction of the carbon footprint with respect to reference scenarios. The carbon dioxide capture from flue gases together with COG utilization can lead to a competitive and sustainable methanol production process depending partly on a carbon tax.

Download Full-text