Browsing by Author "Cho, Kyung Ho"
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- Developing pressure swing adsorption process for biogas upgrading using shaped MIL-160(Al)Publication . Karimi, Mohsen; Rodrigues, Alírio; Ferreira, Alexandre; Nouar, Farid; Cho, Kyung Ho; Lee, Hwang; Serre, Christian; Silva, José A.C.In this study, regarding the increasing interest on renewable sources of energy as well as considering the challenges of climate changes, the potential of shaped MOF MIL-160 (Al) for biogas upgrading has been evaluated. Accordingly, firstly the breakthrough assessments of CO2 and CH4 adsorption onto this sorbents were studied. Afterwards, a pressure swing adsorption (PSA) process to this end was designed and developed. The results showed MIL-160(Al) has an excellent potential for biogas upgrading concerning CO2 and CH4 separation.
- Separation of branched alkanes feeds by a synergistic action of zeolite and metal-organic frameworkPublication . Brântuas, Pedro; Henrique, Adriano; Wahiduzzaman, Mohammad; Wedelstedt, Alexander von; Maity, Tanmoy; Rodrigues, Alírio; Nouar, Farid; Lee, U-Hwang; Cho, Kyung Ho; Silva, José A.C.; Serre, Christian; Maurin, GuillaumeZeolites and metal-organic frameworks (MOFs) are considered as “competitors” for new separation processes. The production of high-quality gasoline is currently achieved through the total isomerization process that separates pentane and hexane isomers while not reaching the ultimate goal of a research octane number (RON) higher than 92. This work demonstrates how a synergistic action of the zeolite 5A and the MIL-160(Al) MOF leads to a novel adsorptive process for octane upgrading of gasoline through an efficient separation of isomers. This innovative mixed-bed adsorbent strategy encompasses a thermodynamically driven separation of hexane isomers according to the degree of branching by MIL-160(Al) coupled to a steric rejection of linear isomers by the molecular sieve zeolite 5A. Their adsorptive separation ability is further evaluated under real conditions by sorption breakthrough and continuous cyclic experiments with a mixed bed of shaped adsorbents. Remarkably, at the industrially relevant temperature of 423 K, an ideal sorption hierarchy of low RON over high RON alkanes is achieved, i.e., n-hexane ≫n-pentane ≫2-methylpentane > 3-methylpentane⋙ 2,3-dimethylbutane > isopentane ≈ 2,2-dimethylbutane, together with a productivity of 1.14 mol dm−3 and a high RON of 92, which is a leap-forward compared with existing processes.
- Separation of CO2/N2 mixture by pressure swing adsorption process using shaped MI-160(Al) for CO2 post-combustion capturePublication . Karimi, Mohsen; Rodrigues, Alírio; Ferreira, Alexandre; Nouar, Farid; Cho, Kyung Ho; Lee, Hwang; Serre, Christian; Silva, José A.C.Breakthrough experiments were properly simulated with ASPEN ADSIM. Cyclic steady state were developed after 10 cycles. Shaped MOF MIL-160(Al) showed and excellent capacity for Post-combustion CO2 Capture. Life cycle assessment (LCA) of MIL-160 for Postcombustion CO2 Capture can be considered as a future direction.
- Separation performance of shaped MOF MIL-160(AL) for double applications of pre and post combustion carbon capturePublication . Karimi, Mohsen; Ferreira, Alexandre; Rodrigues, Alírio; Nouar, Farid; Cho, Kyung Ho; Lee, Hwang; Serre, Christian; Silva, José A.C.The world currently faces the dual challenges: climate changes caused by global warming and a high energy demand regarding the exponential population expansion and industrial development [1, 2]. Carbon dioxide, methane, nitrogen oxide and halogenated components are the main anthropogenic greenhouse gases (GHGs) [1]. The challenge of reducing GHGs emission can be overcome by successful developing post-combustion CO2 capture also advancing the green and renewable sources of energy including biogas [3]. Nevertheless, the main drawback concerning the biogas is its high content on carbon dioxide (it might be as high as 40% or more), which significantly reduces its heating capacity. Therefore, for biogas applications, a previous separation step is required to reduce the CO2 content [2,3]. Among the different methodologies for biogas upgrading and postcombustion CO2 capture, adsorption is among the most attractive ones