Intensification of Adsorption Process in Porous Media

Luo, Lingai

doi:10.1007/978-1-4471-4742-8_2

Cited by 4 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the cold half cycle, gas mixture which is to be separated is passed through the adsorbent bed where the waste gas is get adsorbed and then we get pure gas. Meanwhile, in the hot half cycle, once the adsorption capacity (saturated) of bed is exhausted, then the hot half cycle starts regeneration of adsorbent bed [32]. That is how the regeneration cycle continues, which accomplishes the separation of mixture.…”

Section: Temperature Swing Adsorption (Tsa)mentioning

confidence: 99%

See 1 more Smart Citation

Intensification of Temperature Swing Adsorption

Parkar¹,

Mulukh²,

Narhari³

et al. 2022

JSMPM

View full text Add to dashboard Cite

Temperature swing adsorption (TSA) is an energy intensive process as it needs heat for regenerating the adsorbent bed. Beds are regenerated and saturated simultaneously and are used cyclically. While one bed is undergoing adsorption, other is regenerated and vice versa. Regeneration of bed can be carried out by changing pressure or temperature. Former is called pressure swing adsorption (PSA) and later TSA. Heat is supplied for regeneration to desorb the impurities. Temperature required to regenerate the gas is high. Cycle time can be reduced and the process can be intensified by facilitating faster heat transfer in the bed. Normally the heat transfer coefficient of the adsorbent material is low which affects the cycle time. Better heat transfer can be obtained by increasing the heat transfer through packing by adding metal wires, strips or composite materials. Thus, metal fillings with good conductivity can be used in the bed. Technologies like TEPSA (Thermally Enhanced Pressure Swing Absorption) and TPSA (Temperature Pressure Swing Absorption) are developed for air pre-purification. TEPSA is a PSA process and TPSA is a TSA process. TEPSA is improved by addition of heat while in TPSA, adsorbate is removed by unheated regeneration gas. It is possible to make 20-60% power savings by moving to a TPSA cycle compared to TSA system. TPSA reduces not only cost of vessel but also pipe work involved in process. TPSA has a major advantage which is, without decreasing cycle time, thermal energy can be saved. This article explores various methods for intensification of Temperature swing adsorption. By combining advantages of pressure and temperature swing adsorption, solution to the problem of high energy demand and cycle time can be obtained. Proper selection of adsorbent material can be helpful in building economic process. Selection of adsorbent materials is based on various factors like cross-sectional area, strength, chemical inertness, etc. of the adsorbents. For TSA, thermal properties of adsorbent materials become significantly important while selecting the adsorbent.

show abstract

Section: Temperature Swing Adsorption (Tsa)mentioning

confidence: 99%

“…First is increasing overall heat transfer in particle bed by using thermal conductivity promoters for example compacted natural graphite (its thermal conductivity is high). Second is use of thermoelectric elements (Peltier effect) for the acceleration of temperature changes [32].…”

Section: Temperature Swing Adsorption (Tsa)mentioning

confidence: 99%

Intensification of Temperature Swing Adsorption

Parkar¹,

Mulukh²,

Narhari³

et al. 2022

JSMPM

View full text Add to dashboard Cite

show abstract

“…[11] It allows for resource maximization and does more with less. [12] As shown in Table 1, the more and the less were summarized. [13] Mass transfer between gas and liquid is widely used in chemical engineering.…”

mentioning

confidence: 99%

Process Intensification in Gas–Liquid Mass Transfer by Modification of Reactor Design: A Review

Zhang

Song

et al. 2023

Energy Tech

View full text Add to dashboard Cite

Increasing greenhouse gas (GHG) emissions is a major issue facing the global environment and the public. This increase is due to accelerating industrial development and rising emissions of gases, including carbon dioxide (CO 2 ), methane (CH 4 ), and nitrogen oxides (NO x ). These gases are believed to be the source of global warming. [1] According to the Intergovernmental Panel on Climate Change (IPCC), total GHGs need to be reduced by 50-80% by 2050 to avoid extreme consequences. [2] Therefore, gas removal needs to be improved. In the late 1970s, a new method was developed, namely, carbon capture and storage (CCS), as an effective way to avoid CO 2 emissions into the atmosphere. In addition, H 2 absorption is required for microbial conversion to CH 4 . H 2 -liquid mass transfer limits the rate of biomethanation reactions due to the low H 2 distribution in solution that limits its solubility and, thus, its availability to methanogens. The development of biomethanation technology needs to focus on H 2 -liquid mass transfer to develop large biomethanation capacity. Therefore, an in-depth understanding of process design and operating conditions that affect H 2liquid mass transfer is necessary. In addition to, methane is the main component of natural gas and shale gas, accounting for 90% of the total abundance. [3,4] Thus, as one of the most widely used high-energy resources on earth, methane is considered as the next generation of carbon feedstock. Nevertheless, methane is a nonpolar gas, and its low solubility in solution hinders efficient mass transfer. Therefore, it is necessary to overcome these limitations to achieve high methane conversion. [5][6][7] To the best of our knowledge, as low-cost green oxidant, oxygen is widely used in microbial growth and product synthesis. [8] However, oxygen is less soluble in aqueous solution. At 294.15 K and 1 bar, the dissolved oxygen content of pure water is only 9.2 mg L À1 . [9] Therefore, it is a great challenge for reactor engineering to improve the oxygen transfer capacity of the equipment to meet the needs of the reaction.Ozonation is one of the most widely used advanced oxidation processes (AOPs), which has been applied to treat various types of organic wastewater. However, the equilibrium concentration and mass transfer efficiency of ozone in water are limited, leading to the poor ozone utilization. [10] Therefore, it is necessary to find effective methods to enhance ozone-liquid mass transfer.As deduced in the above finding, new approaches are needed to deal with the pointed out these limitations.Process reinforcement is an important part of the varied aspects of chemical science and engineering. [11] It allows for resource maximization and does more with less. [12] As shown in Table 1, the more and the less were summarized. [13] Mass transfer between gas and liquid is widely used in chemical engineering. It is closely correlated with reaction engineering, separation engineering, and many branches of chemical engineering. The rate and efficiency of mass transfer de...

show abstract

Process Intensification

Tonkovich¹,

Daymo²

2018

Handbook of Thermal Science and Engineering

View full text Add to dashboard Cite

Intensification of Adsorption Process in Porous Media

Cited by 4 publications

References 25 publications

Intensification of Temperature Swing Adsorption

Intensification of Temperature Swing Adsorption

Process Intensification in Gas–Liquid Mass Transfer by Modification of Reactor Design: A Review

Process Intensification

Contact Info

Product

Resources

About