Synergy Pinch Analysis of CO₂ Desorption Process

Abstract

To reduce the regeneration costs of capturing CO2 with absorbents, a two-dimensional desorption model for two-phase flow has been proposed. The temperature and pressure predicted by the model were found to agree well with the experiment data. A new synergy pinch concept was proposed to determine the interactive synergy impacts on mass and heat transfer. According to the proposed synergy pinch principle, the carbon surplus (SAC) and energy surplus (SAE) were defined to quantify the synergy effects for mass and heat transfer, respectively. The proposed synergy pinch principle is that the lower the values of SAC and SAE, the more effective the CO2 desorption. In addition, the synergy pinch point can be identified at the ideal value of zero SAC and SAE. Based on this analysis, a stripper with fin internals was introduced that could contribute energy savings of about 10–14% by synergizing the fluid flow between mass and heat transfer. Thus, it was verified that the synergy pinch method can be effectively applied in CO2 emissions control.

Pinch analysis, as a technique for optimising resource utilisation and promoting environmental sustainability: A review of recent case studies from the developing world and transition economies

“…CEPA was also used in an earlier Chinese case study by Jia XP, et al [74] to show that vis--vis the thenexisting energy planning for a chemical industry park, a further reduction of 10% in GHG emissions could be achieved. In yet another paper dealing with CO 2 emissions control in the Chinese chemical industry, Yu YS et al [75] determined the so-called synergy pinch point with zero CO 2 surplus and zero energy surplus, and recommended the introduction of an energy-efficient gas stripper with fins.…”

Multiscale Velocity Unified Theory To Characterize Microscale Structure of Electrodes and Transfer Mechanism in CO2 Capture

“…When the velocity triangle structure is established, the energy dissipations E 21 and E 23 are deduced using the field synergy theory 10,13 as follows:…”

“…The body force and drag force are cited from the literature. 10,12 The initial state of v is the velocity of the molecule. Additionally, the chemical and electrochemical reaction rates are usually scalar quantities and out of order, which can be transformed into a unified state due to matter movements and molecular motions.…”

“…Moreover, by analogy, the interior angle of the velocity triangle can be considered as the synergy angle developed in the field synergy theory. 10 It is possible to use the interior angle of the velocity triangle to determine energy dissipation because the synergy angle has clearly quantified the energy dissipation in the field synergy theory. Based on these considerations, the multiscale velocity unified theory can be schematically shown in Figure 1.…”

Optimizing Waste Heat Utilization in Vehicle Bio-Methane Plants

“…The region above the pinch point can be used to represent the relationship between external heating energy and the average temperature, whilst the region below the pinch point represents the relationship between external cooling energy and the average temperature [20]. The pinch point of 50 • C is the temperature where the balance of heating/cooling energy required to maintain an optimal process is zero, with the total load curve providing a tool to guide optimization of the heat exchange network [21].…”