scholarly journals A novel approach for the determination of sorption equilibria and sorption enthalpy used for MOF aluminium fumarate with water

2020 ◽  
Author(s):  
Eric Laurenz ◽  
Gerrit Füldner ◽  
Lena Schnabel ◽  
Gerhard Schmitz
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Response Measurement ◽  
Adsorption Enthalpy ◽  
Suitable Material ◽  
Enthalpy Of Adsorption ◽  
Heat Exchanger Design ◽  
Adsorption Equilibria ◽  
Novel Approach ◽  
Differential Enthalpy

Adsorption chillers offer an environmentally friendly solution for the valorisation of waste or solar heat for cooling demands. A recent application is high efficiency data centre cooling, where heat from CPUs is used to drive the process, providing cooling for auxiliary loads. The metal organic framework aluminium fumarate with water is potentially a suitable material pair for this low temperature driven application. A targeted heat exchanger design is a prerequisite for competitiveness, requiring, amongst other things, a sound understanding of adsorption equilibria and adsorption enthalpy. A novel method is employed for their determination based on small isothermal and isochoric state changes, applied with an apparatus developed initially for volume swing frequency response measurement, to samples with a binder-based adsorbent coating. The adsorption enthalpy is calculated through the Clausius–Clapeyron equation from the obtained slopes of the isotherm and isobar, while the absolute uptake is determined volumetrically. The isotherm confirms the step-like form known for aluminium fumarate, with a temperature dependent inflection point at prel ≈ 0.25, 0.28 and 0.33 for 30 °C, 40 °C and 60 °C. The calculated differential enthalpy of adsorption is 2.90 ± 0.05 MJ/kg (52.2 ± 1.0 kJ/mol) on average, which is about 10–15% higher than expected by a simple Dubinin approximation.

scholarly journals A Novel Approach for the Determination of Sorption Equilibria and Sorption Enthalpy Used for MOF Aluminium Fumarate with Water

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 3003
Author(s):  
Eric Laurenz ◽  
Gerrit Füldner ◽  
Lena Schnabel ◽  
Gerhard Schmitz
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Response Measurement ◽  
Adsorption Enthalpy ◽  
Suitable Material ◽  
Enthalpy Of Adsorption ◽  
Heat Exchanger Design ◽  
Adsorption Equilibria ◽  
Novel Approach ◽  
Differential Enthalpy

Adsorption chillers offer an environmentally friendly solution for the valorisation of waste or solar heat for cooling demands. A recent application is high efficiency data centre cooling, where heat from CPUs is used to drive the process, providing cooling for auxiliary loads. The metal organic framework aluminium fumarate with water is potentially a suitable material pair for this low temperature driven application. A targeted heat exchanger design is a prerequisite for competitiveness, requiring, amongst other things, a sound understanding of adsorption equilibria and adsorption enthalpy. A novel method is employed for their determination based on small isothermal and isochoric state changes, applied with an apparatus developed initially for volume swing frequency response measurement, to samples with a binder-based adsorbent coating. The adsorption enthalpy is calculated through the Clausius–Clapeyron equation from the obtained slopes of the isotherm and isobar, while the absolute uptake is determined volumetrically. The isotherm confirms the step-like form known for aluminium fumarate, with a temperature dependent inflection point at p rel ≈ 0.25, 0.28 and 0.33 for 30 °C, 40 °C and 60 °C. The calculated differential enthalpy of adsorption is 2.90 ± 0.05 MJ/kg (52.2 ± 1.0 kJ/mol) on average, which is about 10–15% higher than expected by a simple Dubinin approximation.

Low Temperature Calorimetry Coupled with Molecular Simulations for an In-Depth Characterization of the Guest-Dependent Compliant Behaviour of MOFs

2020 ◽  
Author(s):  
Paul Iacomi ◽  
Bin Zheng ◽  
Simon Krause ◽  
Stefan Kaskel ◽  
Guillaume Maurin ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Metal Organic Framework ◽  
Nitrogen Adsorption ◽  
Enthalpy Of Adsorption ◽  
University Of Technology ◽  
Differential Enthalpy ◽  
Metal Organic ◽  
Complex Structural ◽  
Mesoporous Metal

In this study adsorption microcalorimetry is employed to monitor the adsorption of four probes (argon, oxygen, nitrogen and carbon monoxide) on a highly flexible mesoporous metal-organic framework (DUT-49, DUT = Dresden University of Technology), precisely measuring the differential enthalpy of adsorption alongside high-resolution isotherms. This experimental approach combined with force field Monte Carlo simulations reveals distinct pore filling adsorption behaviours for the selected probes, with argon and oxygen showing abrupt adsorption in the open pore form of DUT-49, in contrast with the gradual filling for nitrogen and carbon monoxide. A complex structural transition behaviour of DUT-49 observed upon nitrogen adsorption is elucidated through an isotherm deconvolution in order to quantify the fraction of the open pore, contracted pore and intermediate pore forms that coexists at a given gas pressure. Finally, the heat flow measured during the guest-induced structural contraction of DUT-49 allowed an exploration of complex open-contracted pore transition energetics, leading to a first assessment of the energy required to induce this spectacular structural change.

Low Temperature Calorimetry Coupled with Molecular Simulations for an In-Depth Characterization of the Guest-Dependent Compliant Behaviour of MOFs

2020 ◽  
Author(s):  
Paul Iacomi ◽  
Bin Zheng ◽  
Simon Krause ◽  
Stefan Kaskel ◽  
Guillaume Maurin ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Metal Organic Framework ◽  
Nitrogen Adsorption ◽  
Enthalpy Of Adsorption ◽  
University Of Technology ◽  
Differential Enthalpy ◽  
Metal Organic ◽  
Complex Structural ◽  
Mesoporous Metal

In this study adsorption microcalorimetry is employed to monitor the adsorption of four probes (argon, oxygen, nitrogen and carbon monoxide) on a highly flexible mesoporous metal-organic framework (DUT-49, DUT = Dresden University of Technology), precisely measuring the differential enthalpy of adsorption alongside high-resolution isotherms. This experimental approach combined with force field Monte Carlo simulations reveals distinct pore filling adsorption behaviours for the selected probes, with argon and oxygen showing abrupt adsorption in the open pore form of DUT-49, in contrast with the gradual filling for nitrogen and carbon monoxide. A complex structural transition behaviour of DUT-49 observed upon nitrogen adsorption is elucidated through an isotherm deconvolution in order to quantify the fraction of the open pore, contracted pore and intermediate pore forms that coexists at a given gas pressure. Finally, the heat flow measured during the guest-induced structural contraction of DUT-49 allowed an exploration of complex open-contracted pore transition energetics, leading to a first assessment of the energy required to induce this spectacular structural change.

scholarly journals Novel Approach Through the Harmonized Sulfur in Disordered Carbon Structure for High-Efficiency Sodium-Ion Exchange

2020 ◽  
Vol 12 (39) ◽  
pp. 43750-43760 ◽  
Author(s):  
Hanvin Kim ◽  
Dae-Yeong Kim ◽  
Shungo Zen ◽  
Jun Kang ◽  
Nozomi Takeuchi
Keyword(s):  
Ion Exchange ◽  
High Efficiency ◽  
Sodium Ion ◽  
Carbon Structure ◽  
Novel Approach ◽  
Disordered Carbon

Shaggy-like Ru-clusters decorated core-shell metal-organic framework-derived CoOx@NPC as high-efficiency catalyst for NaBH4 hydrolysis

2021 ◽  
Vol 46 (11) ◽  
pp. 7772-7781 ◽  
Author(s):  
Shasha Dou ◽  
Wanyu Zhang ◽  
Yuting Yang ◽  
Shuqing Zhou ◽  
Xianfa Rao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Core Shell ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Metal–Organic Framework-Based Solid Acid Materials for Biomass Upgrade

2021 ◽  
Author(s):  
Yutian Qin ◽  
Jun Guo ◽  
Meiting Zhao
Keyword(s):  
High Efficiency ◽  
Solid Acid ◽  
Metal Organic Framework ◽  
Acid Sites ◽  
Solid Acid Catalysts ◽  
Future Research ◽  
Acid Catalysts ◽  
Metal Organic ◽  
Biomass Transformation ◽  
Organic Framework

AbstractBiomass is a green and producible source of energy and chemicals. Hence, developing high-efficiency catalysts for biomass utilization and transformation is urgently demanded. Metal–organic framework (MOF)-based solid acid materials have been considered as promising catalysts in biomass transformation. In this review, we first introduce the genre of Lewis acid and Brønsted acid sites commonly generated in MOFs or MOF-based composites. Then, the methods for the generation and adjustment of corresponding acid sites are overviewed. Next, the catalytic applications of MOF-based solid acid materials in various biomass transformation reactions are summarized and discussed. Furthermore, based on our personal insights, the challenges and outlook on the future development of MOF-based solid acid catalysts are provided. We hope that this review will provide an instructive roadmap for future research on MOFs and MOF-based composites for biomass transformation.

scholarly journals Metal-organic framework-derived Nickel Cobalt oxysulfide nanocages as trifunctional electrocatalysts for high efficiency power to hydrogen

Nano Energy ◽  
2019 ◽  
Vol 58 ◽  
pp. 680-686 ◽  
Author(s):  
Zhengyu Bai ◽  
Shanshan Li ◽  
Jing Fu ◽  
Qing Zhang ◽  
Fangfang Chang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Nickel Cobalt ◽  
Metal Organic ◽  
Organic Framework
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