High quality syngas production from catalytic coal gasification using disposable Ca(OH) 2 catalyst

Chen, Zhaohui; Dun, Qimeng; Shi, Yucai; Lai, Dengguo; Zhou, Yang; Gao, Shiqiu; Xu, Guangwen

doi:10.1016/j.cej.2017.02.025

Cited by 80 publications

(22 citation statements)

References 39 publications

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“…Traditional gasification methods require high pressures (greater than 30 Bar), long residence times of treated materials (up to several hours), special catalysts and their recovery, higher investment and maintenance costs, etc. [54]. Here, where the thermal plasma comes from with its advantages, such as an easy control of the gasification process, operation at atmospheric pressure, short residence time (up to several minutes), no need of catalysts and their recovery, flexibility and smaller size of the equipment of the same capacity, ability to generate reactive species, etc.…”

Section: Comparison With Similar Gasification Methodsmentioning

confidence: 99%

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Tamošiūnas

Chouchène²,

Valatkevičius

et al. 2017

Energies

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Annually, the olive oil industry generates a significant amount of by-products, such as olive pomace, olive husks, tree prunings, leaves, pits, and branches. Therefore, the recovery of these residues has become a major challenge in Mediterranean countries. The utilization of olive industry residues has received much attention in recent years, especially for energy purposes. Accordingly, this primary experimental study aims at investigating the potential of olive biomass waste for energy recovery in terms of synthesis gas (or syngas) production using the thermal arc plasma gasification method. The olive charcoal made from the exhausted olive solid waste (olive pomace) was chosen as a reference material for primary experiments with known composition from the performed proximate and ultimate analysis. The experiments were carried out at various operational parameters: raw biomass and water vapour flow rates and the plasma generator power. The producer gas involved principally CO, H 2 , and CO 2 with the highest concentrations of 41.17%, 13.06%, and 13.48%, respectively. The produced synthesis gas has a lower heating value of 6.09 MJ/nm 3 at the H 2 O/C ratio of 3.15 and the plasma torch had a power of 52.2 kW.

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Section: Comparison With Similar Gasification Methodsmentioning

confidence: 99%

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Tamošiūnas

Chouchène²,

Valatkevičius

et al. 2017

Energies

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“…The catalytic effects of alkali and alkaline earth metallic species on coal gasification have been proved since the 1980s [9][10][11]. The co-gasification of wastewater and coal has been preliminarily studied, which demonstrated the feasibility of using wastewater as a catalyst for coal gasification.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

et al. 2019

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A co-gasification process was proposed both for treating alkaline organic wastewater and to promote coal gasification by the alkaline substances in situ. A catalytic gasification model was developed by introducing a catalytic correction factor to describe the catalytic effects quantitatively. An integrated process simulation was carried out using Aspen Plus equipped with FORTRAN subroutines. The model was verified using the root mean square error between the simulation results and experimental data from the literature. Syngas composition, cold gas efficiency, and carbon conversion efficiency were analyzed with respect to different operating conditions (reaction temperature, steam/coal ratio, and equivalence ratio). The optimal conditions are summarized based on a self-sufficient system by using sensitivity analysis: Gasification temperature of 700 °C, steam/coal ratio = 1.0, and equivalence ratio = 0.4.

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“…Among the different methods for CO 2 conversion such as water–gas shift reaction and CO 2 hydrogenation, electrochemical reduction of CO 2, − and photochemical reduction of CO 2, − the electrochemical conversion is a particularly promising and attractive strategy because of the measurement under mild conditions. − The electrochemical reduction of CO 2 can not only mitigate the global greenhouse effect but also produce syngas from renewable and environmental friendly sources with lower carbon emission than fossil fuels. In recent years, a lot of works have been reported for the electrochemical reduction of CO 2 to CO. − It has been reported that Ag and Au have a high catalytic activity for selectively converting CO 2 to CO. − Cho et al constructed a silver nanowire/carbon nanosheet composite catalyst that produces syngas with tunable H 2 /CO ratios from 1.7 to 2.2 via electrochemical reduction of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Composition-Tunable Syngas from Efficiently Electrochemical Conversion of CO₂ over AuCu/CNT Bimetallic Catalyst

Chen

Zhang

et al. 2019

Ind. Eng. Chem. Res.

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Syngas is significant for the chemical industry for the synthesis of a variety of hydrocarbon fuels and chemicals. Different syngas-based products require syngas with different CO/H 2 ratios, which depend mainly on the design of the catalyst. Under this background, we successfully synthesized syngas by electroreduction of carbon dioxide (CO 2 ) with a controllable CO/H 2 ratio over a AuCu bimetallic catalyst. In contrast to the monometallic Au and Cu catalysts, the AuCu bimetallic catalyst gives a 95.2% of Faradaic efficiency (FE) at only 290 mV on the selective conversion from CO 2 to CO. By tuning the Cu/Au ratio and potential during the electrochemical conversion, the H 2 /CO in the obtained syngas products can be obtained at the wide range of 0.12 to 5.24. We propose that the controllable H 2 /CO ratio from CO 2 is significant in industrial production and will decrease the cost of catalyst fabrication.

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High quality syngas production from catalytic coal gasification using disposable Ca(OH) 2 catalyst

Cited by 80 publications

References 39 publications

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

Synthesis of Composition-Tunable Syngas from Efficiently Electrochemical Conversion of CO₂ over AuCu/CNT Bimetallic Catalyst

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High quality syngas production from catalytic coal gasification using disposable Ca(OH) 2 catalyst

Cited by 80 publications

References 39 publications

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Catalytic Coal Gasification Process Simulation with Alkaline Organic Wastewater in a Fluidized Bed Reactor Using Aspen Plus

Synthesis of Composition-Tunable Syngas from Efficiently Electrochemical Conversion of CO2 over AuCu/CNT Bimetallic Catalyst

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Synthesis of Composition-Tunable Syngas from Efficiently Electrochemical Conversion of CO₂ over AuCu/CNT Bimetallic Catalyst