Search results for: “fertilizer ammonia”
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Density of gases: by pressure and temperature?
The density of gases matters in turbines, compressors, for energy transport and energy storage. Hence this data-file models the density of gases from first principles, using the Ideal Gas Equations and the Clausius-Clapeyron Equation. High energy density is shown for methane, less so for hydrogen and ammonia. CO2, nitrogen, argon and water are also captured.
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Combustion fuels: density, ignition temperature and flame speed?
The quality of a combustion fuel comes down to its physical and chemical properties. Hence the purpose of this data-file is to aggregate data into different fuels’ energy content (kg/m3), energy density (kWh/kg, kWh/gal), flash point (ºC), auto-ignition point (ºC) and flame speed (m/s, cm/s). Conclusions about high quality fuels follow.
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Restoring soil carbon: the economics?
We model the economics for conservation agriculture to restore soil carbon. 5-30T of CO2 can be sequestered per acre per year, while deflating farm costs by 36-73% and raising yields 10-20%. This would transform crop-growing economics from marginal to material.
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Sulphur recovery units: Claus process economics?
This data-file captures the economics of producing sulphur from H2S via the Claus process, yielding an important input for phosphate fertilizers and metals. Cash costs are $40-60/ton and marginal costs are $100/ton. CO2 intensity is low at 0.1 tons/ton. Data-file explores shortages in energy transition?
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Absorption chillers: the economics?
Absorption chillers perform the thermodynamic alchemy of converting waste heat into coolness. Capex costs of absorption chillers average $600/kW-th and all-in absorption chiller costs run to 6-7 cents/ton-hour, depending on the price of incoming waste heat. This data-file captures the economics of absorption chillers from first principles.
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Urea production: the economics
This data-file captures the economics of producing urea, an important fertilizer and intermediate material. We estimate a marginal cost of $325/ton, based on $2/mcf-e energy inputs. CO2 intensity is 1.5 tons/ton. But costs will increase well above $800/ton during times of energy shortages.
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Nitric acid: production costs?
Global production of nitric acid is 60MTpa, in a $25bn pa market, spanning c500 production facilities. This data-file estimates a marginal cost of $350/ton HNO3 and a CO2 intensity averaging 1.8 tons/ton. There are feedback loops where gas shortages could result in fertilizer and metal shortages.
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Global hydrogen supply-demand: by region, by use & over time?
Global production of hydrogen is around 110MTpa in 2023, of which c30% is for ammonia, 25% is for refining, c20% for methanol and c25% for other metals and materials. This data-file estimates global hydrogen supply and demand, by use, by region, and over time, with projections through 2050.
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Topsoe: autothermal reforming technology?
Topsoe autothermal reforming technology aims to maximize the uptime and reliability of blue hydrogen production, despite ultra-high combustion temperatures from the partial oxidation reaction, while achieving high energy efficiency, 90-97% CO2 capture and
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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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