Evaluation of calcined copper slag as an oxygen carrier for chemical looping gasification of sewage sludge

Deng, Zhengbing; Huang, Zhen; He, Fang; Zheng, Anqing; Wei, Guoqiang; Meng, Junguang; Zhao, Zengli; Li, Haibin

doi:10.1016/j.ijhydene.2019.05.039

Cited by 48 publications

(41 citation statements)

References 38 publications

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“…8a, the surface structure of the fresh sample was tough and loose with a porous structure, which was bene cial for the diffusion and reactions of reactants (Das et al 2018). After the 1st cycle, a greater porosity structure was observed than that of fresh sample, which was ascribed to gas escaping from the interior of the OC particles (Deng et al 2019). In this case, the structure was conducive for the penetration of gaseous reactants into the core of the OC particles, which was responsible for the slight increase in performance in the former cycles.…”

Section: Characterization Of Ocsmentioning

confidence: 99%

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Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

Xiao¹,

An²,

Wu³

et al. 2020

Preprint

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Waste activated carbon (WAC), as a typical solid waste, can be utilized by chemical looping gasification (CLG) technology with an iron-based oxygen carrier to produce valuable synthesis gas products. A series of experiments on WAC of the CLG process were carried out in a fixed-bed reactor. The operation parameters involving the OC/WAC mole ratio, steam flow rate and reaction temperature during WAC CLG reactions were investigated in detail. Further, the cyclic performance within 10 cycles was also discussed. Fresh and other representative oxygen carrier samples were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) characterization methods. The results showed that the optimal OC/WAC mole ratio, steam flow rate and reaction temperature were determined to be 0.15, 0.10 mL/min, and 950 °C, respectively, to obtain high-quality syngas with relatively high carbon conversion. The iron-based oxygen carrier exhibited a stable cyclic performance during the multiple tests, following the reaction path of Fe2O3→Fe0.98O in the individual reduction process. Moreover, the iron-based oxygen carrier could be oxidized almost to its initial state after 10 redox tests, and no obvious sintering and agglomeration phenomena were observed. The WAC of CLG presents a new approach for the comprehensive utilization and disposal of solid waste, especially with low volatile feedstocks.

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Section: Characterization Of Ocsmentioning

confidence: 99%

“…A proper addition amount of OC is prone to achieve the partial oxidize the WAC, producing the target gaseous products (Wei et al 2019). Additionally, the OC inventory enhances water-gas shift reaction equilibrium toward products direction to generate more H 2 (Deng et al 2019).…”

Section: Effect Of (Oc/wac) Ratiomentioning

confidence: 99%

Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

Xiao¹,

An²,

Wu³

et al. 2020

Preprint

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“…The presence of iron oxide (12.9-53.6 wt%) and CuFe 2 O 4 spinel in manganese ores and copper ores/slags helps to promote the redox activities, thermal stability, and mechanical strength of the low-cost OCs. [195] Similarly, Deng et al [185] reported a relatively high (70.2%) carbon conversion during CLBP of sewage sludge (SS), when copper slag with high Fe 2 O 3 content was used as the oxygen carrier, with no chemical interaction between the copper slag and the SS ash. Other "impurities" in natural minerals could also lead to synergistic effects.…”

Section: Natural Ores Minerals and Waste Residuesmentioning

confidence: 99%

Developing Oxygen Carriers for Chemical Looping Biomass Processing: Challenges and Opportunities

Zhou

Luo

et al. 2020

Advanced Sustainable Systems

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of global average temperature to within 2 °C compared to pre-industrial era, [2] it is necessary to rapidly reduce our reliance on fossil fuels. To this end, tremendous efforts have been put in to ramp up the capacities of renewable energy generation, including solar, wind, hydro, geothermal, tidal, etc. [3] However, non-biological renewables are available intermittenty, location-specific, and require costly infra

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“…Because the OC was prone to achieve the partial oxidize the WAC with producing the target gaseous products (Wei et al 2019). Besides, the OC enhanced the water-gas shift reaction to generate more H2 (Deng et al 2019).…”

Section: Fig 3 Gasification Characteristics Of Wac With Different Ocmentioning

confidence: 99%

“…After the 1 st cycle, the greater porosity structure was observed than that of fresh sample. It was ascribed to gas escaping from the interior of OC particles (Deng et al 2019). In this case, the structure was conducive for the penetration of gaseous reactants into the core of the OC particles.…”

Section: Characterization Of Ocsmentioning

confidence: 99%

Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

et al. 2020

Preprint

View full text Add to dashboard Cite

Waste activated carbon (WAC), as a typical solid waste, can be utilized by chemical looping gasification (CLG) technology with an iron-based oxygen carrier to produce valuable synthesis gas. A series of experiments on WAC of the CLG process have been carried out in a fixed-bed reactor. The operation parameters involving the OC/WAC mole ratio, steam flow rate and reaction temperature during CLG reactions have been investigated in detail. Further, the cyclic performance within 10 cycles has been also discussed. Fresh and cyclic reaction oxygen carrier samples have been analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In order to obtain high-quality syngas with high carbon conversion, the optimal of OC/WAC mole ratio, steam flow rate and reaction temperature are 0.15, 0.10 mL/min, and 950 °C, respectively. The iron-based oxygen carrier exhibits a stable cyclic performance during the multiple tests, following the reaction path of Fe2O3→Fe0.98O in the individual reduction process. Moreover, the iron-based oxygen carrier could be oxidized almost to its initial state after 10 redox tests. No obvious sintering and agglomeration phenomena are observed. The WAC of CLG presents a new approach for the comprehensive utilization and disposal of solid waste, especially with low volatile feedstock.

show abstract

Evaluation of calcined copper slag as an oxygen carrier for chemical looping gasification of sewage sludge

Cited by 48 publications

References 38 publications

Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

Developing Oxygen Carriers for Chemical Looping Biomass Processing: Challenges and Opportunities

Syngas production by chemical-looping gasification of waste activated carbon with iron-based oxygen carrier

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