Elevated temperature pressure swing adsorption process for reactive separation of CO/CO2 in H2-rich gas

Zhu, Xuancan; Shi, Yixiang; Li, Shuang; Cai, Ningsheng

doi:10.1016/j.ijhydene.2018.05.030

Cited by 35 publications

(9 citation statements)

References 57 publications

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“…Moreover, it could reduce CO concentration in the H 2 /CO/CO 2 gas mixture from 4000 to 1.4 ppm, and the CO 2 concentration from 5% to 7 ppm, yielding H 2 with a purity of 99.999%. Zhu et al [54] proposed a seven-step two-bed elevated-temperature PSA (ET-PSA) system to separate the feed gas CO/CO 2 /H 2 O/H 2 under proper conditions. In this way, H 2 with a purity of 99.9991% and a recovery rate of 99.6% was obtained.…”

Section: Psa Methodsmentioning

confidence: 99%

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

et al. 2021

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Nowadays, we face a series of global challenges, including the growing depletion of fossil energy, environmental pollution, and global warming. The replacement of coal, petroleum, and natural gas by secondary energy resources is vital for sustainable development. Hydrogen (H2) energy is considered the ultimate energy in the 21st century because of its diverse sources, cleanliness, low carbon emission, flexibility, and high efficiency. H2 fuel cell vehicles are commonly the end-point application of H2 energy. Owing to their zero carbon emission, they are gradually replacing traditional vehicles powered by fossil fuel. As the H2 fuel cell vehicle industry rapidly develops, H2 fuel supply, especially H2 quality, attracts increasing attention. Compared with H2 for industrial use, the H2 purity requirements for fuel cells are not high. Still, the impurity content is strictly controlled since even a low amount of some impurities may irreversibly damage fuel cells’ performance and running life. This paper reviews different versions of current standards concerning H2 for fuel cell vehicles in China and abroad. Furthermore, we analyze the causes and developing trends for the changes in these standards in detail. On the other hand, according to characteristics of H2 for fuel cell vehicles, standard H2 purification technologies, such as pressure swing adsorption (PSA), membrane separation and metal hydride separation, were analyzed, and the latest research progress was reviewed.

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Section: Psa Methodsmentioning

confidence: 99%

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

et al. 2021

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“…Additionally, in order to show the trade-off between system throughput and energy consumption, the system is re-parametrized in terms of S/C variations. Instead of the conventional study of system performance in terms of S/Cr and S/Cp [12,24,[35][36][37]54], a new variable is introduced to systematically track rinse and purge steam distribution at a fix total steam consumption. This is called the rinse-to-purge ratio (R/P), and it is defined according to Equation (8).…”

Section: Parametric Approachmentioning

confidence: 99%

Steam and Pressure Management for the Conversion of Steelworks Arising Gases to H2 with CO2 Capture by Stepwise Technology

et al. 2022

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Steel production is a main source of CO2 emissions globally. These emissions must be drastically reduced to meet climate change mitigation goals. STEPWISE is a Sorption Enhanced Reactive Process (SERP) technology that converts steel works arising gases to H2 with simultaneous CO2 capture. The main energy requirements of the process are the high- and low-pressure steam quantities that are needed to rinse and regenerate the adsorbent. In this simulation study, the separation performance of STEPWISE is evaluated over a range of steam and feed pressure inputs by searching those design points where CO2 recovery and purity percentages are equalized. This method is used to facilitate the comparison of different operating regimes. Results highlight the importance of the rinse to purge ratio (R/P) as a design variable. A higher R/P ratio is demonstrated to maintain CO2 recovery and purity of ~95.5%, while total steam consumption and feed carbon loading are reduced by 27% and 20%, respectively. This is achieved without changing other parameters, like cycle time. Additionally, it is demonstrated that the CO2 capture performance can be maintained for varying feed pressure values by tuning the feed carbon loading. Future studies are recommended to focus on the expected role of the feed gas steam content on these findings.

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“…Furthermore, due to the high requirements of hydrogen quality in different steps of the supply chain, purification is also considered. The most widely used purification options are pressure swing adsorption and TSA, both of which can achieve comparably high hydrogen purity levels and sufficiently high hydrogen recovery rates [114][115][116]. In this study, due to its higher efficiency at low absorbent concentrations, TSA will be used for hydrogen drying at cavern storage [117].…”

Section: Conversion and Conditioning Equipmentmentioning

confidence: 99%

Future Hydrogen Markets for Transportation and Industry: The Impact of CO2 Taxes

et al. 2019

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The technological lock-in of the transportation and industrial sector can be largely attributed to the limited availability of alternative fuel infrastructures. Herein, a countrywide supply chain analysis of Germany, spanning until 2050, is applied to investigate promising infrastructure development pathways and associated hydrogen distribution costs for each analyzed hydrogen market. Analyzed supply chain pathways include seasonal storage to balance fluctuating renewable power generation with necessary purification, as well as trailer- and pipeline-based hydrogen delivery. The analysis encompasses green hydrogen feedstock in the chemical industry and fuel cell-based mobility applications, such as local buses, non-electrified regional trains, material handling vehicles, and trucks, as well as passenger cars. Our results indicate that the utilization of low-cost, long-term storage and improved refueling station utilization have the highest impact during the market introduction phase. We find that public transport and captive fleets offer a cost-efficient countrywide renewable hydrogen supply roll-out option. Furthermore, we show that, at comparable effective carbon tax resulting from the current energy tax rates in Germany, hydrogen is cost-competitive in the transportation sector by the year 2025. Moreover, we show that sector-specific CO2 taxes are required to provide a cost-competitive green hydrogen supply in both the transportation and industrial sectors.

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Elevated temperature pressure swing adsorption process for reactive separation of CO/CO2 in H2-rich gas

Cited by 35 publications

References 57 publications

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

A Review of Hydrogen Purification Technologies for Fuel Cell Vehicles

Steam and Pressure Management for the Conversion of Steelworks Arising Gases to H2 with CO2 Capture by Stepwise Technology

Future Hydrogen Markets for Transportation and Industry: The Impact of CO2 Taxes

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