The Experts below are selected from a list of 90555 Experts worldwide ranked by ideXlab platform
Yincheng Guo - One of the best experts on this subject based on the ideXlab platform.
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Reaction sensitivity analysis of Regeneration Process of CO2 capture using aqueous ammonia
Chemical Engineering Journal, 2015Co-Authors: Minkai Zhang, Yincheng GuoAbstract:Abstract In order to improve the Regeneration efficiency of CO 2 capture using aqueous ammonia, it is important to recognize the characteristics of the kinetic reactions in the Regeneration Process. At first, the reaction sensitivity analysis method was determined to identify which kinetic reactions playing important roles in the Regeneration Process. Then, the reaction sensitivity analysis of this Process was performed at different operating conditions of the rich solvent flowing into the stripper. The formation and decomposition reactions of bicarbonate both play important roles on the CO 2 output, and the sensitivity of the CO 2 output to the decomposition reaction of bicarbonate is mostly a bit larger than that to the formation reaction of bicarbonate. Based on the results of the reaction sensitivity analysis, a novel concept that is changing the reaction rates of the kinetic reactions that play important roles in the CO 2 capture Process was proposed for reducing the Regeneration energy. For the tested Process, this novel concept can reduce the Regeneration energy by 30.31%.
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A comprehensive model for Regeneration Process of CO2 capture using aqueous ammonia solution
International Journal of Greenhouse Gas Control, 2014Co-Authors: Minkai Zhang, Yincheng GuoAbstract:Abstract A comprehensive model, which simultaneously considered the hydrodynamics, non-ideal thermodynamic behaviors, rate-based heat/mass transfer, and finite reaction rates, was developed for simulating the Regeneration Process of the NH 3 based CO 2 capture. The kinetic reaction model is adopted for describing the chemical reactions in the condenser, packing section, and reboiler of the stripper. The predicted vapor partial pressures, liquid species concentrations, and Regeneration Process parameters by the comprehensive model agree well with the experimental results. The predictive abilities of the chemistry model and kinetic reaction model for the condenser and reboiler on the Regeneration Process were compared. The chemistry model for the condenser has little effects on the predictions of most parameters of the Regeneration Process, and it only significantly underestimates the NH 3 volume concentration in the gas product. The chemistry model for the reboiler predicts lower CO 2 output, higher reboiler heat duty, and thus higher Regeneration energy.
Suzanne Hirst - One of the best experts on this subject based on the ideXlab platform.
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the financing of urban Regeneration
Land Use Policy, 2000Co-Authors: Alastair Adair, Jim Berry, Stanley Mcgreal, Bill Deddis, Suzanne HirstAbstract:Abstract Private sector involvement through partnership, PFI or other mechanisms is a critical component of the urban Regeneration Process. To date there has been little research into the perceptions of the private sector, reasons for involvement in urban Regeneration and relationships between private and public sector actors. This paper is based on focus group discussions with actors involved in the Regeneration Process. Interpretation, which is from a qualitative perspective, investigates four main themes namely the rationale for private sector investment in urban Regeneration; policy mechanisms to lever private sector investment; the financing of urban Regeneration; and the alleviation of risk.
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The "nancing of urban Regeneration
2000Co-Authors: Alastair Adair, Jim Berry, Stanley Mcgreal, Bill Deddis, Suzanne HirstAbstract:Private sector involvement through partnership, PFI or other mechanisms is a critical component of the urban Regeneration Process. To date there has been little research into the perceptions of the private sector, reasons for involvement in urban Regeneration and relationships between private and public sector actors. This paper is based on focus group discussions with actors involved in the Regeneration Process. Interpretation, which is from a qualitative perspective, investigates four main themes namely the rationale for private sector investment in urban Regeneration; policy mechanisms to lever private sector investment; the "nancing of urban Regeneration; and the alleviation of risk. ( 2000 Elsevier Science Ltd. All rights reserved.
Minkai Zhang - One of the best experts on this subject based on the ideXlab platform.
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Reaction sensitivity analysis of Regeneration Process of CO2 capture using aqueous ammonia
Chemical Engineering Journal, 2015Co-Authors: Minkai Zhang, Yincheng GuoAbstract:Abstract In order to improve the Regeneration efficiency of CO 2 capture using aqueous ammonia, it is important to recognize the characteristics of the kinetic reactions in the Regeneration Process. At first, the reaction sensitivity analysis method was determined to identify which kinetic reactions playing important roles in the Regeneration Process. Then, the reaction sensitivity analysis of this Process was performed at different operating conditions of the rich solvent flowing into the stripper. The formation and decomposition reactions of bicarbonate both play important roles on the CO 2 output, and the sensitivity of the CO 2 output to the decomposition reaction of bicarbonate is mostly a bit larger than that to the formation reaction of bicarbonate. Based on the results of the reaction sensitivity analysis, a novel concept that is changing the reaction rates of the kinetic reactions that play important roles in the CO 2 capture Process was proposed for reducing the Regeneration energy. For the tested Process, this novel concept can reduce the Regeneration energy by 30.31%.
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A comprehensive model for Regeneration Process of CO2 capture using aqueous ammonia solution
International Journal of Greenhouse Gas Control, 2014Co-Authors: Minkai Zhang, Yincheng GuoAbstract:Abstract A comprehensive model, which simultaneously considered the hydrodynamics, non-ideal thermodynamic behaviors, rate-based heat/mass transfer, and finite reaction rates, was developed for simulating the Regeneration Process of the NH 3 based CO 2 capture. The kinetic reaction model is adopted for describing the chemical reactions in the condenser, packing section, and reboiler of the stripper. The predicted vapor partial pressures, liquid species concentrations, and Regeneration Process parameters by the comprehensive model agree well with the experimental results. The predictive abilities of the chemistry model and kinetic reaction model for the condenser and reboiler on the Regeneration Process were compared. The chemistry model for the condenser has little effects on the predictions of most parameters of the Regeneration Process, and it only significantly underestimates the NH 3 volume concentration in the gas product. The chemistry model for the reboiler predicts lower CO 2 output, higher reboiler heat duty, and thus higher Regeneration energy.
Zhongyang Luo - One of the best experts on this subject based on the ideXlab platform.
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Novel Solvent Regeneration Process through Direct Steam Stripping
Energy Procedia, 2014Co-Authors: Qunyang Xiang, Yann Le Moullec, Mengxiang Fang, Jose-carlos Valle-marcos, Wenmin Jiang, Xuping Zhou, Guofei Chen, Zhongyang LuoAbstract:Abstract High energy consumption during solvent Regeneration is a crucial issue for the CO 2 post-combustion capture by chemical absorption. In order to save the latent heat in the Regeneration Process, it is possible to regenerate the solvent through direct steam stripping. This work aims to validate the direct steam stripping Process by experimental study on a lab-scale stripper column. The novel direct steam stripping Process showed potential to reduce Regeneration energy in comparison to the conventional Regeneration Process. The minimum energy consumption of direct steam stripping mode was 2.98 MJ/kg CO 2 , 23% lower than that of the conventional Regeneration mode which is 3.88 MJ/kg CO 2 . Water balance was also investigated. Based on the experimental results, a high feeding solvent temperature close to solvent boiling point and superheated carrier steam was preferred for direct steam stripping Process.
Ken Ikeuchi - One of the best experts on this subject based on the ideXlab platform.
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Quantitative ultrasound can assess the Regeneration Process of tissue-engineered cartilage using a complex between adherent bone marrow cells and a three-dimensional scaffold
Arthritis Research & Therapy, 2005Co-Authors: Koji Hattori, Yoshinori Takakura, Hajime Ohgushi, Takashi Habata, Kota Uematsu, Jun Yamauchi, Kenji Yamashita, Takashi Fukuchi, Masao Sato, Ken IkeuchiAbstract:Articular cartilage (hyaline cartilage) defects resulting from traumatic injury or degenerative joint disease do not repair themselves spontaneously. Therefore, such defects may require novel regenerative strategies to restore biologically and biomechanically functional tissue. Recently, tissue engineering using a complex of cells and scaffold has emerged as a new approach for repairing cartilage defects and restoring cartilage function. With the advent of this new technology, accurate methods for evaluating articular cartilage have become important. In particular, in vivo evaluation is essential for determining the best treatment. However, without a biopsy, which causes damage, articular cartilage cannot be accurately evaluated in a clinical context. We have developed a novel system for evaluating articular cartilage, in which the acoustic properties of the cartilage are measured by introducing an ultrasonic probe during arthroscopy of the knee joint. The purpose of the current study was to determine the efficacy of this ultrasound system for evaluating tissue-engineered cartilage in an experimental model involving implantation of a cell/scaffold complex into rabbit knee joint defects. Ultrasonic echoes from the articular cartilage were converted into a wavelet map by wavelet transformation. On the wavelet map, the percentage maximum magnitude (the maximum magnitude of the measurement area of the operated knee divided by that of the intact cartilage of the opposite, nonoperated knee; %MM) was used as a quantitative index of cartilage Regeneration. Using this index, the tissue-engineered cartilage was examined to elucidate the relations between ultrasonic analysis and biochemical and histological analyses. The %MM increased over the time course of the implant and all the hyaline-like cartilage samples from the histological findings had a high %MM. Correlations were observed between the %MM and the semiquantitative histologic grading scale scores from the histological findings. In the biochemical findings, the chondroitin sulfate content increased over the time course of the implant, whereas the hydroxyproline content remained constant. The chondroitin sulfate content showed a similarity to the results of the %MM values. Ultrasonic measurements were found to predict the Regeneration Process of the tissue-engineered cartilage as a minimally invasive method. Therefore, ultrasonic evaluation using a wavelet map can support the evaluation of tissue-engineered cartilage using cell/scaffold complexes.