Safety and environmental reasons for the use of Ni-, Co-, Cu-, Mn- and Fe-based oxygen carriers in CLC/CLOU applications: An overview

Idziak, Kamil; Czakiert, Tomasz; Krzywański, Jarosław; Żyłka, Anna; Kozłowska, Magdalena; Nowak, Wojciech

doi:10.1016/j.fuel.2020.117245

Cited by 48 publications

(19 citation statements)

References 53 publications

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“…Moreover, past studies [25][26][27] evaluated the process simulation of the SE-SMR with CLC based on NiO/Ni oxygen carriers. Unfortunately, nickel oxides are among the most expensive oxygen carriers and have health, safety and environmental risks, as well as thermodynamic restrictions for fuel conversion, which mean that they are unlikely to be deployed in commercial CLC systems [33][34][35]. Therefore, low cost and less hazardous oxygen carriers such as iron-based oxygen carries must be investigated for this process.…”

Section: Introductionmentioning

confidence: 99%

Process simulations of blue hydrogen production by upgraded sorption enhanced steam methane reforming (SE-SMR) processes

Yan

Thanganadar

Clough

et al. 2020

Energy Conversion and Management

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Clean and carbon-free hydrogen production is expected to play a vital role in future global energy transitions. In this work, six process arrangements for sorption enhanced steam methane reforming (SE-SMR) are proposed for blue H2 production: 1) SE-SMR with an air fired calciner, 2) SE-SMR with a Pressure Swing Adsorption (PSA) unit, 3) SE-SMR thermally coupled with Chemical-Looping Combustion (CLC), 4) SE-SMR+PSA+CLC, 5) SE-SMR+PSA with an oxy-fired calciner, 6) SE-SMR+PSA and indirect firing H2 combustion from the product stream recycle. The proposed process models with rigorous heat exchanger network design were simulated in Aspen Plus to understand the thermodynamic limitations in achieving the maximum CH4 conversion, H2 purity, CO2 capture efficiency, cold gas efficiency and net operating efficiency. A sensitivity study was also performed for changes in the reformer temperature, pressure, and steam to carbon (S/C) ratio to explore the optimal operating space for each case. The SE-SMR+PSA+H2 (Case 6) recycle process can achieve a maximum of 94.2% carbon capture with a trade-off in cold gas efficiency (51.3%), while a near 100% carbon capture with the maximum net efficiency of up to 76.3% is realisable by integrating CLC and PSA (Case 4) at 25 bar. Integration of oxy-fuel combustion lowered the net efficiency by 2.7% points due to the need for an air separation unit. In addition, the SE-SMR with the PSAOG process can be designed as a self-sustaining process without any additional fuel required to meet the process heat utility when the S/C ratio is ~3-3.5.

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Section: Introductionmentioning

confidence: 99%

Process simulations of blue hydrogen production by upgraded sorption enhanced steam methane reforming (SE-SMR) processes

Yan

Thanganadar

Clough

et al. 2020

Energy Conversion and Management

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“…Second, using only one indicator (environmental patent applications) to measure the capacity of a city’s environmental innovation is relatively weak, and building a richer evaluation system for city environmental innovation is a direction we will explore in the future. Third, although six types of environmental technologies were identified based on the work of the Organization for Economic Co-operation and Development (OECD), there are still some environmental technologies that we have not considered, such as adsorption cooling technology [ 52 , 53 ], advanced combustion technology, and emission reduction technology [ 54 , 55 ]. A broader environmental technology identification system should be constructed.…”

Section: Discussionmentioning

confidence: 99%

Does Environmental Regulation Promote Environmental Innovation? An Empirical Study of Cities in China

Duan

Xia

2021

IJERPH

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Promoting environmental innovation through environmental regulation is a key measure for cities to reduce environmental pressure; however, the role of environmental regulation in environmental innovation is controversial. This study used the number of environmental patent applications to measure urban environmental innovation and analyzed the role of urban environmental regulation on urban environmental innovation with the help of the spatial Durbin model (SDM). The results showed that: (1) From 2007 to 2017, the number of environmental patent applications in China has grown rapidly, and technologies related to buildings dominated the development of China’s environmental innovation. (2) Although the number of cities participating in environmental innovation was increasing, China’s environmental innovation activities were highly concentrated in a few cities (Beijing, Shenzhen, and Shanghai), showing significant spatial correlation and spatial agglomeration characteristics. (3) Urban environmental regulation had a positive U-shaped relationship with urban environmental innovation capability, which was consistent with what the Porter hypothesis advocates.

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“…It exhibits high power generation efficiency without generating thermal NO x and captures higher-purity CO 2 from flue. , In addition to no direct contact with air in CLC, the transport of oxygen between air and fuel creates a very high-purity CO 2 stream with the help of an oxygen carrier (OC) material . It uses CLC OCs based on iron, nickel, copper, and manganese. , Nickel-based OCs are highly reactive and mechanically robust and perform well at high temperatures. Despite their high oxygen transport capacity, it was pointed out that Co-based OCs have to overcome their low durability and incomplete fuel conversion.…”

Section: Introductionmentioning

confidence: 99%

“…17 It uses CLC OCs based on iron, nickel, copper, and manganese. 18,19 Nickel-based OCs are highly reactive and mechanically robust and perform well at high temperatures. Despite their high oxygen transport capacity, it was pointed out that Co-based OCs have to overcome their low durability and incomplete fuel conversion.…”

Section: Introductionmentioning

confidence: 99%

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

Lee

Lee³

2021

ACS Omega

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The natural gas combined cycle (NGCC) is the most popular and efficient fossil fuel power plant; however, integrating a carbon capture system reduces its performance efficiency. The demand to reduce the carbon capture cost and improve eco-friendliness drives the development of alternatives. In this study, four alternative NGCC-based process schemes were designed: NGCC with amine carbon capture as a base configuration and NGCCs with three different chemical looping combustion (CLC) configurations. Detailed heat and material balances were evaluated for all four cases using the PRO/II simulation package. A comparative analysis of the gross and net power, plant efficiency, and carbon capture efficiency, which are imperative to optimizing the process configuration, was conducted for all of the proposed cases. All NGCC-CLC processes could produce higher net power than NGCC-MEA because the amine regenerator consumes a high amount of power in its operation. In the condition using an equal amount of natural gas supply, NGCC-CLC configurations using excess air could produce a net power of 510.1 MW with a plant efficiency of 44.35%. The excess air fed in both cases enabled the turbine to generate more power. NGCC-CLC using excess air with steam turbine integration has an investment cost of 132.9 $/net MWh, an operating cost of 56.7 $/net MWh year, and a levelized cost of electricity of 90.9 $/MWh. In addition, NGCC-CLC with excess air resulted in a carbon capture efficiency of 99.93% under 59.2 $/ton of CO 2 , which was higher than that of NGCC-MEA with a carbon efficiency of 95.1%. NGCC-CLC using excess air with steam turbine integration is considered as the most efficient process scheme for generating power from natural gas with regard to efficiency, cost, and environmental impact.

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Safety and environmental reasons for the use of Ni-, Co-, Cu-, Mn- and Fe-based oxygen carriers in CLC/CLOU applications: An overview

Cited by 48 publications

References 53 publications

Process simulations of blue hydrogen production by upgraded sorption enhanced steam methane reforming (SE-SMR) processes

Process simulations of blue hydrogen production by upgraded sorption enhanced steam methane reforming (SE-SMR) processes

Does Environmental Regulation Promote Environmental Innovation? An Empirical Study of Cities in China

Performance and Cost Analysis of Natural Gas Combined Cycle Plants with Chemical Looping Combustion

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