Advances in chemical looping combustion technology

Joshi, Anuj; Mohapatra, Pinak; Joshi, Rushikesh K.; Kumar, Sonu; Sunny, Ashin A.; Cheng, Zhuo; Qin, Lang; Fan, Liang‐Shih

doi:10.1016/b978-0-323-99213-8.00003-5

Cited by 6 publications

(4 citation statements)

References 107 publications

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“…Thus, developing an oxygen carrier that is low-cost and recyclable is critical. 24,[31][32][33][34][35][36][37] Among the various carriers tested for the selective oxidation of hydrocarbon feeds, vanadium phosphorous oxide (VOPO 4 ) is a promising candidate. As mentioned above, some of its phases have been studied as a catalyst for selective methanol oxidation and have exhibited good yields.…”

Section: Introductionmentioning

confidence: 99%

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Joshi,

Kumar,

Marx

et al. 2024

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Joshi,

Kumar,

Marx

et al. 2024

J. Mater. Chem. A

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“…A low-cost oxygen carrier with high performance is the key to CLC . To date, more than 2000 types of oxygen carriers have been developed . OCs are mainly classified into Fe-based, Cu-based, Ni-based, Co-based, and Mn-based metal oxides and CaSO 4 , according to their active components.…”

Section: Introductionmentioning

confidence: 99%

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Liu,

Bu,

Zou

et al. 2024

Energy Fuels

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Chemical looping combustion (CLC) has entered the stage of engineering demonstration, thus urgently requiring industrial-scale preparation of an oxygen carrier (OC). This work proposes a novel hydroforming method for the industrial-scale preparation of OC. The cheap copper ore and iron ore fines are active components, and cement is the binder. First, the biore OCs through a laboratory hydraulic press are tested in a thermogravimetric analyzer (TGA) and a batch fluidized bed (BFB) reactor. The optimal loading ratio of cement is 20 wt %, and a CH 4 conversion above 90% is achieved. Second, the hydroforming is scaled up to the industrial scale. The industrial-scale OC shows favorable performance in the 100-cycle H 2 /CH 4 /coal CLC tests, achieving an oxygen loss ratio of 6 wt %, a CH 4 conversion of around 90%, and a combustion efficiency of 95%, respectively. Finally, the characterization results suggest that the OCs always meet the crushing strength demand and their specific surface areas get larger after 100 cycles. They demonstrate stable crystal structures with Fe 2 O 3 and CuFe 2 O 4 , relatively rich pore structures, and evenly distributed elements throughout the cycles. The industrial-scale hydroforming method is a competitive candidate for OC preparation, considering the favorable performance of prepared OC and its high compatibility with raw materials.

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“…To ensure engineering makes net-positive contributions to environmentally friendly and economical process development, especially for fossil fuel utilization, innovative approaches are required to reduce the emission of pollutants while continuing the utilization of fossil fuels. − Furthermore, due to rapid advancements in fracking technology, CH 4 production has steeply risen, and its utilization has recently gained widespread attention for producing energy or value-added products employing a carbon-neutral or carbon-negative process scheme. − Though CH 4 is a cleaner fossil fuel than coal, its overproduction until now has led to colossal energy wastage due to flaring. Chemical looping (CL) is an advanced technology that has shown responsible utilization of CH 4 alongside CO 2 capture. − The technology is based on splitting a reaction into subreactions to minimize exergy loss and maximize operational flexibility. − These subreactions involve reaction intermediates termed as oxygen carriers (OCs) that react and are regenerated cyclically. Specifically, these subreactions are redox reactions involving gaseous reactants and solid reaction intermediates .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Chemical Looping Process Coupling Natural Gas Conversion and NO_x Purification

et al. 2023

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We present a novel low-temperature chemical looping combustion scheme for simultaneous natural gas conversion into a sequestration-ready CO2 stream and NO x purification. The scheme employs nickel oxide (NiO) supported on ZrO2 as the oxygen carrier. In the process, CH4 reduces the oxidized carrier to Ni/ZrO2 in a co-current moving bed reactor, which is then oxidized back to NiO/ZrO2 by the NO x -laden flue gas in a fluidized bed reactor, completing the oxygen carrier loop. Thermodynamic studies demonstrate that the presence of CO2 does not significantly affect NO x purification performance at different flue gas flow rates. The operating temperatures of the reactors are selected based on NO x -temperature programmed oxidation (TPO) and CH4-temperature programmed reduction (TPR) experiments. Results show that the process can optimally operate at temperatures close to the combustion plants’ flue gas temperature of 400–500 °C, reducing the need for hot utilities. The study conducts comprehensive isothermal and autothermal analyses of the process to evaluate the effects of temperature and carrier flow rate on CH4 conversion, CO2 selectivity, carbon deposition, and NO x conversion. For the autothermal analysis, the CH4 reactor operates adiabatically, while the NO x reactor operates isothermally. Comparative studies with the conventional NO x selective catalytic reduction (SCR) process indicate an exergy efficiency and effective thermal efficiency (ETE) improvement of 9 and 18 percentage points, respectively. The findings suggest that this low-temperature chemical looping process is a promising solution for flue gas NO x treatment, utilizing cheaper natural gas as the reductant and eliminating environmental concerns, such as ammonia or urea slippage. Overall, this study contributes to the development of more efficient and sustainable methods for reducing NO x emissions.

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Advances in chemical looping combustion technology

Cited by 6 publications

References 107 publications

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Synergistic Chemical Looping Process Coupling Natural Gas Conversion and NO_x Purification

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Advances in chemical looping combustion technology

Cited by 6 publications

References 107 publications

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Chemical looping methanol oxidation using supported vanadium phosphorous oxide carriers for formaldehyde production

Industrial-Scale Preparation of Biore Oxygen Carriers for Chemical Looping Combustion via a Hydroforming Method

Synergistic Chemical Looping Process Coupling Natural Gas Conversion and NOx Purification

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Product

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Synergistic Chemical Looping Process Coupling Natural Gas Conversion and NO_x Purification