Kinetics of Ca(OH)2 decomposition in pure Ca(OH)2 and Ca(OH)2-CaTiO3 composite pellets for application in thermochemical energy storage system

Gupta, Aman; Armatis, Paul D.; Sabharwall, Piyush; Fronk, Brian M.; Utgikar, Vivek

doi:10.1016/j.ces.2021.116986

Cited by 28 publications

(10 citation statements)

References 38 publications

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“…The XRD pattern reveals the absence of CaO and CaCO 3 peaks, while only the Ca(OH) 2 characteristic peaks are observed. Additionally, TGA analysis using nitrogen as the carrier gas demonstrates a weight loss of approximately 13% within the temperature range of 400–500 °C, indicating the decomposition of Ca(OH) 2 to CaO. , For spent CaO-Ni/CeO 2 after gas-phase BRM at a higher temperature (700 °C), the characteristic peaks of CaO are in presence, meanwhile with the absence of Ca(OH) 2 , indicating that formation of Ca(OH) 2 was inhibited at high temperature. Similarly, no significant weight loss was observed in the TGA analysis, further proving the absence of the Ca(OH) 2 species.…”

Section: Resultsmentioning

confidence: 96%

Exploring the Challenges of Calcium Looping Integrated with Methane Bireforming for Enhanced Carbon Capture and Utilization

Law,

Tsai

2023

Langmuir

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The urgent need to mitigate greenhouse gas emissions and combat climate change has driven research in carbon capture and utilization (CCU) technologies. Among these, calcium looping (CaL) has emerged as a prominent candidate for CO 2 capture. This study aimed to explore the novel integration of CaL with methane bireforming (BRM) using CaO-Ni/CeO 2 as dual-function material (DFM) and investigated the challenges and opportunities associated with the process. Implementing a calcium looping-bireforming (CaL-BRM) process revealed distinct differences compared to methane dry reforming (DRM). Notably, methane conversion occurred at higher temperatures, likely due to competition with the formation of Ca(OH) 2 . Meanwhile, the conversion of CO 2 was delayed, possibly because hydroxide species on the CaO surfaces hindered the availability of CO 2 for methane reforming. To address these challenges, Ni/CeO 2 and CaO-Ni/ CeO 2 catalysts were employed in conventional catalytic gas-phase BRM and methane steam reforming (SRM) reactions. The results demonstrated that the presence of CaO significantly influenced BRM efficiency due to the Ca(OH) 2 formation, as was evident by the results of the characterization on the postreaction catalysts and the parallel study of SRM. This study contributes valuable insights into the feasibility and potential of CaL-BRM, advancing the development of sustainable CCU technologies.

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Section: Resultsmentioning

confidence: 96%

Exploring the Challenges of Calcium Looping Integrated with Methane Bireforming for Enhanced Carbon Capture and Utilization

Law,

Tsai

2023

Langmuir

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“…Therefore, the SO 2 capture process reaction rate can be parameterized by variables, including temperature, conversion rate, and mechanism function [ 30 ]. The reaction conversion rate during the SO 2 capture process can be described by Eq.…”

Section: Resultsmentioning

confidence: 99%

Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission

Li¹,

Huhe²,

Zeng³

et al. 2022

Heliyon

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“…Adding a minimal amount of nano-SiO2 to CaO particles prevented agglomeration and stabilized the bulk characteristics of CaO particles, but had little effect on lowering the dehydration temperature, according to Roßkopf et al [24,25]. Gupta et al [26] investigated the effect of addition of CaTiO3 with Ca(OH)2 pellets and the results showed increase in rate of reaction with 55% increase in mechanical strength of the pellet.…”

Section: Chemical Heat Pumpmentioning

confidence: 99%

Preliminary Pilot-scale Study and Techno-economic Analysis of Chemical Heat Pump with Conventional Nuclear Reactors

Gupta

Sabharwall

Utgikar

2022

Self Cite

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The energy economy is continually evolving, particularly in terms of primary energy sources, their conversions to useful forms such as electricity and heat, and their utilization in different sectors, in response to socio-political factors. Because nuclear source is clean and non-carbon-emitting energy source, it is crucial to consider its role in the evolution of the energy economy. A pilot-scale study was conducted for Chemical Heat Pump (ChHP) system at three different scales (25-, 100-, and 1000-kW thermal outputs) using steady state thermal model. To establish the viability of selling heat rather than electricity alone, technoeconomic analysis was undertaken for advanced Small Modular Reactor (SMR), and SMR paired with varied thermal output ChHP systems was referred to as the nuclear hybrid energy system (NHES) in this study. Using the U.S. Energy Information Administration statistics, pricing for electricity and natural gas were anticipated for U.S. regions (California, Northwest, Midwest, Southwest, New England, and PJM -Pennsylvania, New Jersey, and Maryland). Based on thermal output from ChHP, advanced SMR with 100 MWth and four alternative NHES scenarios were explored, namely 50-, 10-, 5-, and 1-MWth. Net present value, payback period, discounted cash flow return, and levelized cost of energy were evaluated for all scenarios. Based on the economic analysis, selling heat to high-temperature industrial processes is more profitable compared to selling electricity only. Higher carbon taxes showed significant improvement in economic parameters for NHESs. Providing heat to high-temperature industries could be beneficial, helping to reduce the greenhouse gas emissions by slashing the fossil fuel consumption. vi

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Kinetics of Ca(OH)2 decomposition in pure Ca(OH)2 and Ca(OH)2-CaTiO3 composite pellets for application in thermochemical energy storage system

Cited by 28 publications

References 38 publications

Exploring the Challenges of Calcium Looping Integrated with Methane Bireforming for Enhanced Carbon Capture and Utilization

Exploring the Challenges of Calcium Looping Integrated with Methane Bireforming for Enhanced Carbon Capture and Utilization

Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission

Preliminary Pilot-scale Study and Techno-economic Analysis of Chemical Heat Pump with Conventional Nuclear Reactors

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