Design of a bench scale unit for continuous CO2 capture via temperature swing adsorption—Fluid-dynamic feasibility study

Schöny, Gerhard; Zehetner, Egon; Fuchs, Johannes; Pröll, Tobias; Sprachmann, Gerald; Hofbauer, Hermann

doi:10.1016/j.cherd.2015.12.018

Cited by 33 publications

(25 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors of this work most recently proposed and developed a novel reactor design for a continuous TSA CO 2 capture process [14,15]. The system applies multi-stage fluidized bed columns in the adsorber and desorber that allow for effective heat integration and efficient process operation, through establishment of counter-current contact of gas and sorbent streams (Fig.…”

Section: Introductionmentioning

confidence: 99%

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Sonnleitner

Schöny

Hofbauer

2017

Biomass Conv. Bioref.

Self Cite

View full text Add to dashboard Cite

Two commercially available CO 2 -adsorbent materials (i.e., zeolite 13X (13X) and Lewatit® VP OC 1065 (Lewatit)) were evaluated for their applicability in a continuous temperature swing adsorption (TSA) process for biogas upgrading. The equilibrium adsorption characteristics of carbon dioxide and methane were determined by fixed bed and TGA tests. While relatively high CO 2 capacities were measured for both materials (3.6 and 2.5 mol kg), neither of them was found to adsorb significant amounts of CH 4 . Lewatit showed to be fully regenerable at 95°C, whereas for 13X, the regeneration was not complete at this temperature. However, 13X showed no degradation up to 190°C, whereas Lewatit started to degrade at 110 and 90°C when exposed to N 2 and air, respectively. Fluidization tests showed that Lewatit provides a high mechanical stability, while on the contrary, the tested 13X showed considerable attrition. An equilibrium adsorption model was fitted to the measured CO 2 adsorption data. The adsorption model was then integrated into an existing simulation tool for the proposed TSA process to roughly estimate the expectable regeneration energy demand for both materials. It was found that depending on the operating conditions, the regeneration energy demand lies between 0.32-0.54 kWh th /m 3 prodgas for 13X and 0.71-1.10 kWh th /m 3 prodgas for Lewatit. Since heat integration measures were not considered in the simulations, it was concluded that the proposed TSA process has a great potential to reduce the overall energy demand for biogas upgrading and that both tested adsorbent materials may be suitable for application in the proposed TSA process.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Sonnleitner

Schöny

Hofbauer

2017

Biomass Conv. Bioref.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Geometric structure of the three adsorption capture scales. [36,[40][41][42][43][44][45][46][47][48][49][50][51] www.advancedsciencenews.com www.entechnol.de…”

Section: Calculation Methodsmentioning

confidence: 99%

“…[40] However, benchmarking analysis does not attempt to obtain general results in different situations, but the most accurate results in specific situations. According to previous literature, [36,[40][41][42][43][44][45][46][47][48][49][50][51] current research on carbon capture is still focused on the laboratory scale. Therefore, the geometric structure of the adsorption bed and adsorbent performance are shown in Table 4 and the operating parameters of TSA system are shown in Table 5.…”

Section: Design Parametersmentioning

confidence: 99%

The Thermodynamics‐Based Benchmarking Analysis on Energy‐Efficiency Performance of CO₂ Capture Technology: Temperature Swing Adsorption as Case Study

et al. 2020

View full text Add to dashboard Cite

Climate issues, especially linked to the greenhouse effect and global warming, are receiving increasing attention. The most direct cause is the overproduction of anthropogenic carbon dioxide. Carbon capture and storage (CCS) is one of the main strategies for mitigating and controlling CO 2 emissions from large emission sources, as well as achieving large-scale CO 2 emission reductions. [1] In October 2018, the Intergovernmental Panel on Climate Change (IPCC) released the 1.5 C Special Report in Incheon, which found that global CO 2 emissions would need to fall by %45% from 2010 levels by 2030, and that the world should aim to be carbon neutral by %2050 by removing CO 2 from the air to stabilize remaining emissions. [2] In June 2019, China released The Third Information Bulletin and The Second Biennial Update, which highlighted CO 2 as the main greenhouse gas emitted by China. However, compared with 2005, China's energy-related CO 2 emissions per unit of GDP decreased by 40.7% in 2016. Nevertheless, the rapid and widespread reduction in carbon emissions is required from all sectors to limit the global temperature rise to 1.5 C or even 2 C. [3] The desire for a shared future for mankind has prompted China to establish increasingly severe emission-control scenarios that call for accelerated development of practical carbon capture technology. [4] However, a lack of generalized methods and reasonable benchmarking analysis of the energy efficiency of typical carbon capture technologies may lead to low reliability, poor generalization, and even contrasting research conclusions regarding their energy efficiency and energy consumption. Thus, an adequate benchmarking analysis framework is urgently required for carbon capture technology. CCS is widely regarded as a new solution to the common challenges currently faced by human society. [5] However, in recent years, CCS research has been inhibited by the "old" problem of excess specific-heat consumption. Thus, it is difficult to promote technological development with sustainable cost control. Moreover, according to the first law of thermodynamics, current carbon capture technology typically requires heat consumption of 3-4 GJ to capture 1 ton of CO 2. [6] Furthermore, its theoretical exergy efficiency is generally below 20% and it exhibits low technology maturity, despite substantial potential for energy conservation and consumption reduction. [7] For post-combustion CO 2 capture, the feasibility of several technologies (such as absorption, adsorption, membrane, and cryogenic methods) has previously been demonstrated. [8] Adsorption is considered to be a

show abstract

“…However, heat transfer between a fluidized bed and an immersed object depends on a number of process-factors [5][6][7][8][9][10][11][12], including particle (i.e., type of Geldart) and gas properties, in-bed object geometry (i.e., heat exchanger layout) and of course fluidization rate. The TSA-process considers particles of Geldart type B [13] in terms of solids well-mixed behaviors [13] for acceptable CO 2 capture performance [14].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations on Heat Transfer of Bare Tubes in a Bubbling Fluidized Bed with Respect to Better Heat Integration in Temperature Swing Adsorption Systems

2019

View full text Add to dashboard Cite

In this paper experimental and numerical investigations on heat transfer within a bubbling fluidized bed will be presented with respect to better heat integration in continuous temperature swing adsorption (TSA) processes for biogas upgrading. In the literature, mainly heat transfer measurements with glass or sand particles are carried out, thus special reference measurements with adsorbent material in a fluidized bed are missing. Therefore firstly, a series of experiments were carried out in the fluidized bed test facility to obtain heat transfer coefficients between tube surface and bed which were then compared to calculated heat transfer coefficients to determine whether suitable models were available. Horizontal bare tubes with different arrangements (i.e., single tubes and especially tube bundles) are immersed in fluidized amine layered particles with a mean diameter of 650 μ m which are used in the adsorption industry as adsorbent. The test facility enables a cross-current flow of the solids and gas phase as it prevails in a multi-stage fluidized bed reactor for TSA-applications. The heat transfer measurements with different arrangements and adsorbent material show very similar values in the range of 200 W/m 2 K. The mathematical model for single tubes multiplied by a tube diameter factor shows approximate agreement with the experimental results. However, the mathematical models for tube bundles were not able to predict the measured heat transfer coefficients with the required accuracy. Secondly, a computer fluid dynamics (CFD) program was used to perform a numerical investigation of the test facility using the Euler–Euler method in order to describe the required two-phase characteristic of a fluidized bed. The results of the numerical simulation were compared and validated with the experimental results. Bubbling fluidized bed flow regimes could be reproduced well but the heat transfer coefficients between tube and bed were clearly underestimated. However, a numerical study for a bubbling fluidized bed with external circulation, as used in novel continuous TSA systems, could be carried out and thus a tool for better heat integration measures was developed.

show abstract

Design of a bench scale unit for continuous CO2 capture via temperature swing adsorption—Fluid-dynamic feasibility study

Cited by 33 publications

References 24 publications

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

The Thermodynamics‐Based Benchmarking Analysis on Energy‐Efficiency Performance of CO₂ Capture Technology: Temperature Swing Adsorption as Case Study

Experimental and Numerical Investigations on Heat Transfer of Bare Tubes in a Bubbling Fluidized Bed with Respect to Better Heat Integration in Temperature Swing Adsorption Systems

Contact Info

Product

Resources

About

Design of a bench scale unit for continuous CO2 capture via temperature swing adsorption—Fluid-dynamic feasibility study

Cited by 33 publications

References 24 publications

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

Assessment of zeolite 13X and Lewatit® VP OC 1065 for application in a continuous temperature swing adsorption process for biogas upgrading

The Thermodynamics‐Based Benchmarking Analysis on Energy‐Efficiency Performance of CO2 Capture Technology: Temperature Swing Adsorption as Case Study

Experimental and Numerical Investigations on Heat Transfer of Bare Tubes in a Bubbling Fluidized Bed with Respect to Better Heat Integration in Temperature Swing Adsorption Systems

Contact Info

Product

Resources

About

The Thermodynamics‐Based Benchmarking Analysis on Energy‐Efficiency Performance of CO₂ Capture Technology: Temperature Swing Adsorption as Case Study