Enriching blast furnace gas by removing carbon dioxide

Limits to Paris compatibility of CO2 capture and utilization

Characteristics of the large-scale circulation during episodes with high and low concentrations of carbon dioxide and air pollutants at an arctic monitoring site in winter

Supersonic separator for cleaner offshore processing of natural gas with high carbon dioxide content: Environmental and economic assessments

In this paper, the origin of carbon dioxide and nitrogen in natural gases produced from the Erawan gas field is discussed on the basis of carbon isotopic data and several geological evidences. Maximum contents of carbon dioxide and nitrogen in natural gases recovered from three wells at the northwestern flank of this field, are 59.72% and 21.38%, respectively.As a result of carbon isotopic studies of methane, ethane and carbon dioxide in 11 gas samples of those wells, natural gases are divided into two groups, such as group A and group B.The group A is characterized by heavy methane (-30 to 33‰ PDB) on carbon isotopic compositon, and by high contents of carbon dioxide and nitrogen. Gases of this group are a mixture of magmatic gases and organic-origin gases. The magmatic gases consisting of mainly carbon dioxide, nitrogen and heavy methane have migrated into the present reservoirs from the pre-Tertiary basement through the east-dipping faults cutting the basement.The group B is characterized by normal contents of carbon dioxide and nitrogen, and by lighter methane (-38 to -41‰ PDB) on carbon isotopic composition. Gases of this group have been generated from the organic matters in the Tertiary sediments by thermal maturation.

The potential of direct air capture using adsorbents in cold climates.

Comparative analysis of separation technologies for processing carbon dioxide rich natural gas in ultra-deepwater oil fields

The article presents modern burner devices for power and industrial boilers that provide NOx emissions (when burning natural gas — 125 mg/m3, when burning fuel oil — 250 mg/m3). The burners are equipped with modern ignition safety devices and injectors. There are also new burners for combustion of blast furnace, coke oven and natural gas. Combustion of gases with diff erent properties causes certain diffi culties associated with providing operational parameters of power plants. Diff erences in the characteristics of combustible fuels also determine the diff erences in the course of combustion processes, emission characteristics of the fl are, and volumes of combustion products. The article gives successful examples of the operation of combined burners. Also considered in the article are the peculiarities of the organization of the furnace process for co-incineration of blast furnace gas, coke oven gas and natural gas in boiler furnaces from 100 to 500 t/h. The article provides guidelines on combustion of low-calorifi c by-products of industrial enterprises (blast furnace gas, coke oven gas, etc.). An important factor for solving environmental problems is the need to recycle liquid and gaseous wastes of powerful industrial enterprises. We have developed special ovens for neutralizing industrial effl uents and various gases. The main technical solutions for the organization of combustion of gaseous and liquid wastes are given in the article. Two variants of furnace arrangements (vertical and horizontal) are presented. A furnace with a burner for burning water-coal suspension is also of considerable interest. Materials are presented on new developments of various types of heat generators: with internal refractory and fi reproof lining and those completely made of metal (air-cooled, internal fl ame tube made of steel Х18Н9Т, outer housing — steel 20). Special combustion chambers can be used to neutralize gaseous and liquid wastes.

Techno-economic analysis of coke oven gas and blast furnace gas to methanol process with carbon dioxide capture and utilization

ASSIMILATION AND RESPIRATION OF EXCISED LEAVES AT HIGH CONCENTRATIONS OF CARBON DIOXIDE

Modeling of radiative properties of an Oxyfuel atmosphere with a weighted sum of gray gases for variable carbon dioxide and water vapor concentrations

Upgrading of natural gas ultra-rich in carbon dioxide: Optimal arrangement of membrane skids and polishing with chemical absorption

Model predictions of PCDD and PCDF emissions on the iron ore sintering process based on alternative gaseous fuels

Exergoeconomic analysis of the power generation system using blast furnace and coke oven gas in a Brazilian steel mill

Landfill gas as one of the promising artificial gaseous fuels is analyzed for use in heating system of regenerative air heaters for blast furnaces. Increasing the temperature of blast is one of the most effective ways for metallurgical coke saving and increase the productivity of blast furnaces. To increase this temperature, a mixture of blast-furnace and coke oven gases is used as fuel for regenerative heat exchangers. Considering the current shortage of coke oven gas, landfill gas, the main combustible element of which is methane, is proposed as a high-calorie additive to the main fuel. Calculations were made for the combustion of a mixture of gaseous fuels in three combinations: blast-furnace gas, blast-furnace and coke gases mixture, blast-furnace and landfill gases mixture. The possibility of increasing the temperature of the hot blast to 1250 °C for the air supply system of a blast furnace with a volume of 1033 m³ was considered. Calculations showed that in order to achieve such a temperature, the adiabatic combustion temperature should be 1423 °C, and the flue gas temperature in the crown should be 1300 °C. Such temperatures cannot be reached using only blast-furnace gas, so two possible options were considered. The first option is the use of a coke and blast furnace gases mixture with a coke gas content of 6.3 % and combustion air heating to 180 °C by exhaust gases from blast furnace air heaters. The second option is combustion of a mixture of blast-furnace and landfill gas with combustion air heating to 180 °C (the content of landfill gas is 7.6 %). The flow rate of the fuel mixture for the second option is 68,523 m³ /h, and the required amount of landfill gas is 5208 m³ /h. The volumes of gas output from landfills in large cities are reported to be 5–10 MCM a year, which is less than the amount of biogas required to heat an air heater. Therefore, to achieve the required temperature it makes sense to consider a tree gas mixture that is blast-furnace, coke and landfill gases an appropriate proportions. The use of landfill gas contributes to the solution of an important environmental problem of land and atmosphere pollution during the accumulation of municipal solid waste.

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