Scan Science and Technology
Contact Leading Edge Experts & Companies
Absorber Tower
The Experts below are selected from a list of 129 Experts worldwide ranked by ideXlab platform
B H Salman – 1st expert on this subject based on the ideXlab platform
-
performance of cnt water nanofluid as coolant fluid in shell and tube intercooler of a lpg Absorber Tower
International Journal of Heat and Mass Transfer, 2016Co-Authors: Masoud S Hosseini, B H Salman, Leila VafajooAbstract:This study presents the performance of CNT-water nanofluid in low concentrations (0.0055%, 0.055%, 0.111% and 0.278%) as a cooling fluid which is utilized in a shell and tube intercooler of a LPG Absorber Tower. Heat exchanger was simulated by ASPEN HTFS+ 7.3 software and its thermal performance was evaluated. Then the results were analyzed and compared with cooling water performance. It was observed that for maximum CNT volume fraction which is 0.278%, the overall heat transfer coefficient and heat transfer rate increased about 14.5% and 10.3% respectively, compared to water. This advantage can decrease the heat transfer area of the heat exchanger which will leads to decrease the manufacturing cost for the heat exchanger. The outlet temperature of the hot fluid decreased with increasing the CNT volume fraction whereas the pressure drop due to the solid nanoparticles suspended in water was too low. Also, increasing both the nanofluid and the hot fluid mass flow rates, it leads to increase the heat transfer rate. Moreover, when increasing either the coolant or the hot fluid inlet temperatures, the outlet temperature of the hot fluid increases. But when using the nanofluid, increasing intensity of the outlet temperature of the hot fluid was less.
Sima Sabzalipour – 2nd expert on this subject based on the ideXlab platform
-
CO_2 chemical absorption from fluid catalytic cracking unit flue gases of Abadan Oil Refinery in Iran, using diethanolamine solvent
Environmental Science and Pollution Research, 2020Co-Authors: Nader Nikeghbali Sisakht, Maryam Mohammadi Rouzbahani, Abdolreza Karbasi, Sorosh Zarinabadi, Sima SabzalipourAbstract:The Fluid Catalytic Cracking Unit process converts heavy vacuum gas oil into more valuable products in the presence of zeolite catalyst at 520 °C and 2.5 bar. The coke is burned off with air in the regenerator Tower at 700 °C and 230 ton / h of flue gases are produced. The flue gases consist of CO_2 (12.7% mole), N_2 (66.2% mole), H_2O (19.2% mole), O_2 (1.7% mole), and SO_2 (0.2% mole). In this study, the chemical absorption of CO_2 in an absorption and desorption pilot plant was investigated and this process was simulated by Aspen Hysys. The pilot plant used has an Absorber Tower of 15 cm in diameter and a stripper Tower of 10 cm. The Towers were filled up to 1.5 m with 3-mm Raschig ring packing. A concentration of 30 wt% diethanolamine (DEA) solvent is used for CO_2 absorption. Absorption was carried out at 1.1 bar, solvent temperature of 40 °C, flue gas temperature of 60 °C, and liquid to gas ratio ( L / G = 3.7). Amine regeneration was carried out at 125 °C and 1.9 bar. The CO_2 absorption efficiency in the pilot plant was obtained 96% and in Aspen Hysys simulation its 95%. The CO_2 recovery efficiency in the stripper Tower obtained 95% and CO_2 purity is 94.6%. The overall efficiency of the chemical absorption with this process is 92%, and the regeneration energy in the stripper Tower is 2.52 GJ/ton-co_2. With this method, 1003 ton/day CO_2 is captured from the FCCU flue gases and preventing emission to the atmosphere.
-
CO2 chemical absorption from fluid catalytic cracking unit flue gases of Abadan Oil Refinery in Iran, using diethanolamine solvent.
Environmental Science and Pollution Research, 2020Co-Authors: Nader Nikeghbali Sisakht, Maryam Mohammadi Rouzbahani, Abdolreza Karbasi, Sorosh Zarinabadi, Sima SabzalipourAbstract:The Fluid Catalytic Cracking Unit process converts heavy vacuum gas oil into more valuable products in the presence of zeolite catalyst at 520 °C and 2.5 bar. The coke is burned off with air in the regenerator Tower at 700 °C and 230 ton / h of flue gases are produced. The flue gases consist of CO2 (12.7% mole), N2 (66.2% mole), H2O (19.2% mole), O2 (1.7% mole), and SO2 (0.2% mole). In this study, the chemical absorption of CO2 in an absorption and desorption pilot plant was investigated and this process was simulated by Aspen Hysys. The pilot plant used has an Absorber Tower of 15 cm in diameter and a stripper Tower of 10 cm. The Towers were filled up to 1.5 m with 3-mm Raschig ring packing. A concentration of 30 wt% diethanolamine (DEA) solvent is used for CO2 absorption. Absorption was carried out at 1.1 bar, solvent temperature of 40 °C, flue gas temperature of 60 °C, and liquid to gas ratio (L/G = 3.7). Amine regeneration was carried out at 125 °C and 1.9 bar. The CO2 absorption efficiency in the pilot plant was obtained 96% and in Aspen Hysys simulation its 95%. The CO2 recovery efficiency in the stripper Tower obtained 95% and CO2 purity is 94.6%. The overall efficiency of the chemical absorption with this process is 92%, and the regeneration energy in the stripper Tower is 2.52 GJ/ton-co2. With this method, 1003 ton/day CO2 is captured from the FCCU flue gases and preventing emission to the atmosphere.
P. Estellé – 3rd expert on this subject based on the ideXlab platform
-
Comment on “Performance of CNT-water nanofluid as coolant fluid in shell and tube intercooler of a LPG Absorber Tower”
International Journal of Heat and Mass Transfer, 2016Co-Authors: P. EstelléAbstract:International audienceRecently, Hosseini et al. [1] investigated from simulations the potential of CNT-water based nanofluids as coolants in an industrial shell and tube heat exchanger. This study is of interest as the main goal is to demonstrate efficiency of nanofluids in real industrial application. The simulations were performed considering thermophysical properties of CNT-water-based nanofluids we reported earlier in [2,3], except for viscosity and this latter point requires clarifications…
-
Comment on “Performance of CNT-water nanofluid as coolant fluid in shell and tube intercooler of a LPG Absorber Tower”
International Journal of Heat and Mass Transfer, 2016Co-Authors: P. EstelléAbstract:Recently, Hosseini et al. [1] investigated from simulations the potential of CNT-water based nanofluids as coolants in an industrial shell and tube heat exchanger. This study is of interest as the main goal is to demonstrate efficiency of nanofluids in real industrial application. The simulations were performed considering thermophysical properties of CNT-water-based nanofluids we reported earlier in [2,3], except for viscosity and this latter point requires clarifications….