Search results for: “NOx”
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Selective catalytic reduction: costs of NOx removal?
This data-file captures selective catalytic reduction costs to remove NOx from the exhaust gas of combustion boilers and burners. Our base case estimate is 0.25 c/kWh at a combined cycle gas plant, which equates to $4,000/ton of NOx removed. Capex costs, operating costs, coal plants and marine fuels can be stress-tested in the model.
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Vehicle emissions of CO, NOx and HCs?
There has been a remarkable reduction in the negative air quality impacts of combustion vehicles since 1970, as quantified in this data-file and over time. Vehicle emissions of CO, NOx and HCs have all fallen by 20-60x over the past 50-years, to 5 grams/mile, 0.2 grams/mile and 0.3 grams per mile, respectively. This data-file quantifies…
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Air quality: sulphur, NOx and particulate emissions?
The flue gas of a typical combustion facility contains c7% CO2, 60ppm of NOx, 40ppm of SOx and 2ppm of particulate dusts. This is our conclusion from tabulating data across 75 large combustion facilities, mainly power generation facilities in Europe. However, the range is broad. As a rule of thumb, gas is cleanest, biomass and…
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Cummins: diesel engine and generator technology?
Cummins is a power technology company, listed in the US, specializing in diesel engines, underlying components, exhaust gas after-treatment, diesel power generation and pivoting towards hydrogen. We reviewed 80 patents from 2023-24. What outlook for Cummins technology and verticals in the energy transition?
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Gas turbines: operating parameters?
A typical simple-cycle gas turbine is sized at 200MW, and achieves 38% efficiency, as super-heated gases at 1,250ºC temperature and 100-bar pressure expand to drive a turbine. The exhaust gas is still at about 600ºC. In a combined cycle gas plant, this heat can be used to produce steam that drives an additional turbine, adding…
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Thermal power plant: loss attribution?
This data-file is a simple loss attribution for a thermal power plant. For example, a typical coal-fired power plant might achieve a primary efficiency of 38%, converting thermal energy in coal into electrical energy. Our loss attribution covers the other 62% using simple physics and industry average data-points.
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Dreaming of Electric Frac Fleets?
In 2019, the virtues of switching diesel-powered frac fleets to gas-powered electric have been extolled by companies such as EOG, Shell, Baker Hughes, Halliburton, Evolution and US Well Services. The chief benefit is a material cost saving, quantified per well in this data-model, as a function of the frac fleet size, its upgrade costs, its…
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US Refinery Database: CO2 intensity by facility?
This US refinery database covers 125 US refining facilities, with an average capacity of 150kbpd, and an average CO2 intensity of 33 kg/bbl. Upper quartile performers emitted less than 20 kg/bbl, while lower quartile performers emitted over 40 kg/bbl. The goal of this refinery database is to disaggregate US refining CO2 intensity by company and…
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Costs of CCS with the amine process?
This data-file models the economics of capturing CO2 from exhaust flues using the amine process. Our base case estimate is informed by five tabs of cost data and technical papers, but all of the input assumptions can be flexed to stress-test costs. Total costs rise exponentially if it is necessary to capture CO2 from more…
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Cable installation vessels: costs and operating parameters?
This is a database of cable installation vessels for offshore wind and power transmission; tabulating costs (in $M), contract awards (in $/km), capacity (in tons), installation speeds (in meters per hour), power ratings (in MW), crew sizes and positioning systems. There is a paradox over costs.
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