PDF Publication Title:
Text from PDF Page: 154
(1) CO2 absorption. The biogas is pressurized to 0.8 MPa with the multistage-compressor (blocks COMP1 and COMP2) and injected into the bottom of the scrubber (block ABSORBER), while water is sprayed from the top of the scrubber. The gas leaving at the top of the scrubber is dried to get 97 % (vole) CH4. As the process of biogas compression is exothermic, two heat exchangers are used (blocks H1 and H2) to maintain the temperature of raw biogas entered to the absorber. (2) Flash. The CO2-enriched solvent (leaving from the bottom of the absorber) enters a flash tank (block FLASH) where the pressure is decreased in order to improve the recovery of methane (CH4). The vapor phase (stream GAS-REC) released from the flash tank is mixed with the raw biogas and recirculated to the second stage of the multistage-compressor (block COMP2). (3) Solvent regeneration. The liquid phase leaving from the flash tank is sent to the desorption column (block DESORBER) and regenerated by decreasing the pressure to 0.1 MPa with an aeration of air using a blower. In process simulation, the absorber and desorber were modeled with the Radfrac model without condenser and reboiler. There are two main approaches to modeling absorber and desorber in Aspen Plus: equilibrium and rate-based approaches. In this work, the equilibrium approach was used. 3.2. Validation of process simulation based on HPWS. Before conducting the process simulation with aqueous ChCl/Urea (1:2) as the absorbent, the HPWS was simulated in order to validate the simulation conducted in this work and provide part of the simulation parameters. The verification was performed by comparing with the simulation results from others. HPWS process has been simulated with Aspen Plus9, 49-51. Gotz et al.51 was the first to simulate this process, while Cozma et al.49 provided the most detail information about this simulation. Therefore, the simulation results from both of them were used to validate the results of this work based on equilibrium-stage model. In simulation, the number of theoretical stages for absorber was set to be 11 on the basis of the previous work49. The number of theoretical stages for desorber was set to be 2 in this work. The composition of raw biogas and the operational conditions were set as those used by Gotz et al.51 (listed in Table 5). It should be mentioned that in the simulation of HPWS, the raw biogas entering for upgrading is with impurities of N2, O2, H2 and H2S as listed in Table 5. Based on the above mentioned conditions, the simulation result showed that the gas leaving the scrubber contains: 96.73 % CH4, 0.218 % CO2, 0.00000496 ppm H2S, 2.10 % N2, 0.56 % O2, 0.0917 % H2, and 0.30 % H2O, which was almost the same as those from literature (96.5-96.8 % CH4, 0.397-0.47 % CO2, 0.000094 ppm H2S, 2.09-2.10 % N2, 0.56-0.563 % O2, 0.0902 % H2, and 0.319-0.32 % H2O)49, 51. Meanwhile, the gas leaving the desorber contains: 0.0654 % CH4, 17.1 % CO2, 38.6 ppm H2S, 63.6 % N2, 16.9 % O2, 0.175 ppm H2, and 2.39 % H2O, which was also almost the same as those from literature (0.0677-0.07 % CH4, 17.1-17.5 % CO2, 38-39.5 ppm H2S, 63.5-65.2 % N2, 16.8-17.3 % O2, 0.193 ppm H2, and 2.31-2.34 % H2O) 49, 51. Therefore, we can conclude that the simulation in this work is reliable. Table 5. The parameter of process simulation Parameter CH4/CO2* N2/O2/H2S/H2* Units mol % mol % Raw biogas 53.7/45.2 0.93/0.19/0.0108/0.0508 Operational conditions 14PDF Image | CO2 Separation with Ionic Liquids
PDF Search Title:
CO2 Separation with Ionic LiquidsOriginal File Name Searched:
co2-separation-ionic-liquids.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)