摘要:
Systems and methods are provided for combined cycle power generation while reducing or mitigating emissions during power generation. Recycled exhaust gas from a power generation combustion reaction can be separated using a swing adsorption process so as to generate a high purity CO2 stream while reducing/minimizing the energy required for the separation and without having to reduce the temperature of the exhaust gas. This can allow for improved energy recovery while also generating high purity streams of carbon dioxide and nitrogen.
摘要:
Hydrogen can be recovered in a refinery network using a combination of a cycling adsorber unit and a membrane separation unit. A membrane separation unit can be used to generate at least a portion of the purge hydrogen stream for the cycling adsorber unit. This can reduce the portion of the hydrogen product stream from the cycling adsorber unit required for regeneration of the adsorbent.
摘要:
Improved hydroprocessing processes for upgrading refinery streams via the use of rapid cycle pressure swing absorption having a cycle time of less than 30 s for increasing the concentration of hydrogen in the vapor phase product recycled to the hydroprocessing zone.
摘要:
A cryogenic air separation unit (ASU) (12) is integrated into a lube oil dehazing process whereby waste nitrogen (16) from 'the ASU is used to cool a lube oil base stock to promote the agglomeration (17) and separation (21) of haze-forming constituents in the base stock. Advantageously, the ASU may be part of a gas-to-liquid plant.
摘要:
The present invention is a method for operating a rapid cycling pressure swing adsorption (RCPSA) having a cycle time, T, to separate a feed gas into a non-adsorbed gas and tail gas. The method includes the steps of passing the feed gas having a purity of F % at high pressure into a first end of a bed which selectively adsorbs the tail gas and passes the product gas out a second end of the bed for a time, F. The product gas has a purity, P %, and a rate of recovery of R %. Then the bed is cocurrently depressurized for a time, t co , followed by countercurrently depressurizing the bed for a time, tCN. The bed is then purged for a time, tP, wherein desorbate (tail gas) is released at the first end of the bed at a pressure greater than 30 psig. Subsequently the bed is repressurized for a duration, tRP
摘要:
Systems and methods are provided for combined cycle power generation while reducing or mitigating emissions during power generation. Recycled exhaust gas from a power generation combustion reaction can be separated using a swing adsorption process so as to generate a high purity CO2 stream while reducing/minimizing the energy required for the separation and without having to reduce the temperature of the exhaust gas. This can allow for improved energy recovery while also generating high purity streams of carbon dioxide and nitrogen.
摘要:
An improved hydrotreating process for removing sulfur from distillate boiling range feedstreams. This improved process utilizes a two stage hydrotreating process scheme, each stage associated with an acid gas removal zone wherein one of the stages utilizes a rapid cycle pressure swing adsorption zone to increase the concentration of hydrogen in the process.