A review on the solid sorption mechanism and kinetic models of metal halide-ammonia working pairs

An, Gi-Hong; Wang, L.W.; Gao, Jiao; Wang, R.Z.

doi:10.1016/j.rser.2018.04.032

Cited by 19 publications

(8 citation statements)

References 71 publications

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“…Few kinetic models have been developed with absorption/desorption for heat storage [ 43,44 ] and there is still much debate about how to best model the mechanism. [ 45 ] Nevertheless, the model developed herein incorporates the main terms for i). accumulation of ammonia and ii) the driving force (i.e., pressure relative to equilibrium) of each step, while approximating the temperature dependence of kinetic constants as being relatively insignificant over the range of temperatures studied.…”

Section: Methodsmentioning

confidence: 99%

Exceeding Single‐Pass Equilibrium with Integrated Absorption Separation for Ammonia Synthesis Using Renewable Energy—Redefining the Haber‐Bosch Loop

Smith

Torrente‐Murciano

2021

Advanced Energy Materials

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The synthesis of ammonia through the Haber‐Bosch process has been at the foundation of the chemical industry for over 100 years, but when the energy and feedstock sources switch from fossil fuels to renewable electricity, the process needs to be reimagined. Herein, the successful integration of ammonia synthesis and separation is demonstrated in a recycle‐less process setting the foundations of green ammonia technology. The ruthenium‐based catalyst uses a nanostructured CeO2 support and Cs electronic promotion to remove hydrogen and ammonia inhibition, respectively, creating a catalyst with low‐temperature (<300 °C) activity that quickly approaches equilibrium. The absorbent uses MnCl2 to avoid the acid releasing decomposition of conventional absorbents like MgCl2, and a support of SiO2 to simultaneously enhance MnCl2 dispersion and improve stabilization. This integrated catalyst‐absorbent system reproducibly exceeds single‐pass ammonia synthesis equilibrium. Kinetic models of the catalyst and absorbent successfully predict the experimental long‐term behavior and facilitate the design of an integrated system. These results present a framework for aligning intermittent and isolated renewable energy with ammonia synthesis by decreasing capital complexity and increasing process agility—adapting to a shifting energy landscape to continue providing fertilizers with minimum CO2 penalty and pioneer energy storage.

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Section: Methodsmentioning

confidence: 99%

Exceeding Single‐Pass Equilibrium with Integrated Absorption Separation for Ammonia Synthesis Using Renewable Energy—Redefining the Haber‐Bosch Loop

Smith

Torrente‐Murciano

2021

Advanced Energy Materials

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“…The following classic chemisorption kinetic equations are used for ammonia adsorption and desorption respectively in the current study [18]:…”

Section: Chemisorption Model and Simulationmentioning

confidence: 99%

Seasonal solar thermal energy storage using thermochemical sorption in domestic dwellings in the UK

Bao

Roskilly

2019

Energy

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.

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“…Both Dubinin-Polanyi potential energy theory and Dubinin-Radushkevish theory are based on analysis of Gibbs free energy and adsorption potential, which are essential to study physical adsorption with various materials and bore diameter. However, for chemisorption such as reaction between halide and ammonia, analysing Gibbs free energy can only obtain the reaction direction but not the specific sorption property, as the sorption performance is led by the complexation reaction 32 . The principle of single-stage solid sorption cycle, taking MnCl 2 as example, can be divided into two phases, i.e.…”

Section: Solid Sorption and Resorption Processesmentioning

confidence: 99%

Mechanism of hysteresis for composite multi-halide and its superior performance for low grade energy recovery

Wang

Gao

et al. 2019

Sci Rep

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Sorption hysteresis commonly exists for different sorbents and has a great impact on the performance, and recently it was found that the multi-halide sorbents could reduce the hysteresis phenomena. Here we report the mechanism of the sorption hysteresis for multi-halide under equilibrium/non-equilibrium conditions and its superior performance for low grade energy recovery. We find that the inner reaction among different halides does not happen and contribute to sorption hysteresis in sorption/desorption phases under equilibrium conditions. While under non-equilibrium conditions, multi-halide sorbents reduce the hysteresis significantly (the average hysteresis temperature difference decreases from 23.4 °C to 7.8 °C at 4.41 bar). The phenomena is studied, and results show that the continuous reaction within different halides under heterothermic condition leads to an operable multi-stage reaction property, which corresponds to better flexibility and faster response to heat source. The utilization of solar energy as heat source for a cloudy day is analyzed, and multi-halide sorbent has much larger average refrigeration power (improved by 43%) and could work efficiently most of the time. Such characteristics are also prospective for other thermochemical reaction technologies, such as de-NOx and energy storage because of lower energy input and higher energy output features.

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A review on the solid sorption mechanism and kinetic models of metal halide-ammonia working pairs

Cited by 19 publications

References 71 publications

Exceeding Single‐Pass Equilibrium with Integrated Absorption Separation for Ammonia Synthesis Using Renewable Energy—Redefining the Haber‐Bosch Loop

Exceeding Single‐Pass Equilibrium with Integrated Absorption Separation for Ammonia Synthesis Using Renewable Energy—Redefining the Haber‐Bosch Loop

Seasonal solar thermal energy storage using thermochemical sorption in domestic dwellings in the UK

Mechanism of hysteresis for composite multi-halide and its superior performance for low grade energy recovery

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