High Pressure Water Power Recovery Turbine

In the CO2 removal process, a large quantity of absorbent liquid is supplied under pressure (about 30 kg/cm2) to the top of the absorbing column. This absorbent liquid removes about 15 vol.% of CO2 that is contained in the gas coming from the reforming process and shift conversion process. Instead of using a pressure-reducing valve to reduce the pressure to 1 kg/cm2 before liquid is sent to the regenerating column, a high pressure water power recovery turbine can be installed that uses the pressure to drive the feed pump for the absorbent liquid (NEDO, 2008. p.137; ECCJ, 1999. p.155). 

Development Status Products

High Pressure Water Power Recovery Turbine Costs & Benefits

Parent Process: Gas Refining
Energy Savings Potential
CO2 Emission Reduction Potential

Investment costs are reported to be 150 million Yen for a 330,000 t ammonia/year plant, providing annual revenues of 36 million Yen and resulting in a payback time of 4.1 years (199 values) (ECCJ, 1999. p.155).

High Pressure Water Power Recovery Turbine Schematic

High Pressure Water Power Recovery Turbine Publications

Global Warming Countermeasures: Japanese Technologies for Energy Savings / GHG Emissions Reduction

This revised 2008 version of the publication from New Energy and Industrial Technology Development of Japan includes information on innovative Japanese technologies for energy efficiency and for the reduction of COemissions.  

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Directory of Energy Conservation Technology in Japan - Section 3: Chemical Industry

Prepared by New Energy and Industrial Technology Development Organization and the Energy Conservation Center, Japan, this extensive directory covers an extensive list of energy saving measures applicable to diverse range of industries. Section 3 concentrates on measures applicable to chemical industry, including ammonia production.

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