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Search results for: โ€œNOXโ€

  • Selective catalytic reduction: costs of NOx removal?

    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?

    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?

    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: 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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  • Thermal power plant: loss attribution?

    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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  • Diesel power generation: levelized costs?

    Diesel power generation: levelized costs?

    A multi-MW scale diesel generator requires an effective power price of 20c/kWh, in order to earn a 10% IRR, on c$700/kW capex, assuming $70 oil prices and c150km trucking of oil products to the facility. Economics can be stress-tested in the Model-Base tab.

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  • Shanghai Electric: gas turbine technology competition?

    Shanghai Electric: gas turbine technology competition?

    Shanghai Electric gas turbine technology is contrasted against the Western gas turbine leaders in this data-file, based on reviewing 20 patents from 2021-24. Shanghai Electric is clearly trying to compete in this space, and the patent review uncovered interesting details into turbine temperatures, efficiencies, reliability, AI+sensing and manufacturing costs.

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  • Mainspring Energy: linear generator breakthrough?

    Mainspring Energy: linear generator breakthrough?

    Linear generator technology can convert any gaseous fuel into electricity, with c45% electrical efficiency, and >80% efficiency in CHP mode. This data-file reviews Mainspring Energy’s patents. We conclude that the company has locked up the IP for piston-seal assemblies in a linear generator with air bearings, but longevity/maintenance could be a key challenge to explore.

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  • CCS: what CO2 purity for transport and disposal?

    CCS: what CO2 purity for transport and disposal?

    The minimum CO2 purity for CCS starts at 90%, while a typical CO2 disposal site requires 95%, CO2-EOR requires 96%, CO2 pipelines require 97% and CO2 liquefaction or shipping requires >99%. This data-file aggregates numbers from technical papers and seeks to explain CO2 purity for transport and disposal.

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  • MHI CCS technology: performance, costs and emissions?

    MHI CCS technology: performance, costs and emissions?

    MHI has deployed an amine-based CO2 capture technology, in 15 plants globally, going back to 1999. Reboiler duties are around 2.6 GJ/ton on a 10% CO2 feed. Capture rates and capture purity are high. Degradation and amine emissions are controlled, and c80-90% below MEA. CCS costs and complexities remain high. In our view, this is…

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