Enhancing CO 2 Adsorption Capacity and Cycling Stability of Mg-MOF-74
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RESEARCH ARTICLE-CHEMICAL ENGINEERING
Enhancing CO2 Adsorption Capacity and Cycling Stability of Mg-MOF-74 Naef A. A. Qasem1
· Ahmed Abuelyamen2,3 · Rached Ben-Mansour2,3
Received: 19 November 2019 / Accepted: 17 September 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract Mitigation of carbon dioxide emitted from burning fossil fuels is essential to overcome climate change issues. Adsorption technology could significantly help in capturing CO2 and, thereby minimizing global warming with low-cost penalties. MgMOF-74 was reported as a distinguished adsorbent that has high adsorption capacity at flue gas conditions. In the present study, an improvement of crystallinity, porosity, and capacity of Mg-MOF-74 was investigated through controlling the heat surface area of the sample solution during the synthesis process. The results showed that the increase in the heat surface area during the synthesis process increased BET surface area and pore volume of the adsorbent by 38% and 44%, respectively, over those obtained by the reported method in the literature. For additional improvement in the cyclic CO2 uptake, multiwalled carbon nanotubes (MWCNT) were incorporated with Mg-MOF-74. The adsorption cycling stability was performed using three techniques: temperature swing adsorption (TSA), vapor swing adsorption (VSA), and temperature vacuum swing adsorption (TVSA). It was observed that the incorporation of MWCNT with Mg-MOF-74 resulted in higher CO2 recycling capacity (14.4%) using thermal-based regeneration processes (i.e., TSA and TVSA) due to the enhancement in the thermal transport properties of the new composite (MWCNT/Mg-MOF-74). Keywords Carbon capture · Heat transfer area · Mg-MOF-74 · MWCNT · Recycling stability · Swing adsorption
Abbreviations BET CAS CCS CNT ESA GHG LAHT MAHT
B
Brunauer–Emmett–Teller Chemical abstracts service Carbon capture and consequence Carbon nanotubes Electric swing adsorption Greenhouse gases Large area for heat transfer Medium area for heat transfer
Naef A. A. Qasem [email protected]
1
Department of Aerospace Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia
2
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia
3
King Abdulaziz City for Science and Technology – Technology Innovation Center on Carbon Capture and Sequestration (KACST-TIC on CCS), KFUPM, Dhahran 31261, Saudi Arabia
MWCNT MOF SAHT TSA TVSA VSA ZIF
Multi-walled carbon nanotube Metal–organic framework Small area for heat transfer Temperature swing adsorption Temperature vacuum swing adsorption Vacuum swing adsorption Zeolitic imidazolate framework
1 Introduction Recently, energy consumption has tremendously increased due to the growth of the human population and industrial activities. Most of this energy was generated by burning fuels such as oil, coal, wood, and natural gas [1]. Combustion using such kind of fuels produces greenhouse gases (GHG), which are considered to be responsi
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