Thermodynamic study on the integrated supercritical water gasification with reforming process for hydrogen production: Effects of operating parameters

Hantoko, Dwi; Su, Hongcai; Kanchanatip, Ekkachai; Susanto, Herri; Wang, Guobin; Zhang, Sicheng; Zhang, Xu

doi:10.1016/j.ijhydene.2018.07.198

Cited by 67 publications

(10 citation statements)

References 46 publications

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“…It can be deduced that higher reaction pressure is not conductive to producing hydrogen and higher pressure can enhance the selectivity of byproducts, such as alkanes and carbon dioxide. This result is consistent with the literature reports [47,48]. It has been reported that during the methane reforming process, the concentration of H 2 gradually decreased with the pressure of reforming, while the selectivity of CO remained almost constant [47].…”

Section: Influence Of Reaction Condition On Apr Of Phenolsupporting

confidence: 93%

“…This result is consistent with the literature reports [47,48]. It has been reported that during the methane reforming process, the concentration of H 2 gradually decreased with the pressure of reforming, while the selectivity of CO remained almost constant [47]. According to these analyses, lower pressure is much more suitable for the APR of phenol to produce hydrogen.…”

Section: Influence Of Reaction Condition On Apr Of Phenolsupporting

confidence: 92%

See 1 more Smart Citation

Aqueous‐phase reforming of phenol over hydrotalcite‐derived Ni/Zn/Al catalysts

Li¹,

Zhang

Xu³

et al. 2019

IET Renewable Power Generation

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With the depletion of non-regenerated energy and the increasing awareness of environmental protection, renewable energy developing has become a key subject of research. Hydrogen as a kind of clean energy has aroused much attention. In this study, hydrogen production from bio-oil derived phenolic compound in aqueous phase was studied. Hydrotalcite-derived Ni/Zn/Al catalysts with different metallic compositions were synthesised and screened for aqueous-phase reforming (APR) of phenol. The physiochemical characterisations of hydrotalcite-derived Ni/Zn/Al samples were detected by X-ray powder diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and N 2-sorption. In the calcined hydrotalcite-derived Ni 5.3 /Zn 2.7 /Al samples, most of the metal oxides exist in the form of rock solid and wurtzite type phase. In order to optimise the reaction condition of APR of phenol, the impacts of initial phenol concentration, reaction pressure and reaction temperature during the APR of phenol were investigated. It was found that increasing the concentration of phenol could enhance the side reaction and decrease the selectivity of hydrogen, while enhancing the reaction pressure was not favourable for hydrogen production. Moreover, proper reaction temperature was necessary for APR of phenol to produce hydrogen over hydrotalcite-derived Ni/Zn/Al catalysts.

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Section: Influence Of Reaction Condition On Apr Of Phenolsupporting

confidence: 93%

Section: Influence Of Reaction Condition On Apr Of Phenolsupporting

confidence: 92%

Aqueous‐phase reforming of phenol over hydrotalcite‐derived Ni/Zn/Al catalysts

Li¹,

Zhang

Xu³

et al. 2019

IET Renewable Power Generation

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“…The water vapor concentration inlet is another variable that can affect the membrane’s separation performance. In this case, when the inlet flow rate was constant, the higher feed concentration provided a higher driving force [30]. This effect is shown in Figure 5c.…”

Section: Resultsmentioning

confidence: 99%

Effects of Operating Parameters on Ionic Liquid Membrane to Remove Humidity in a Green Continuous Process

et al. 2019

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Membrane processes are promising methods to separate gases from feed streams without phase changing. A hybrid process, the combination of ionic liquids with a ceramic membrane (ILM), has been developed for humidity removal in a green continuous process. This new concept provides a more efficient and available ionic liquid (IL)-based membrane regeneration process, which just switches the moist feed stream to dry air. Furthermore, the ILM presents high stability and mechanical resistance during long-time operation. In addition, the influences of several operating parameters, including flow rate, temperature, absolute pressure, and feed concentration on process efficiency were investigated. The lower inlet flow rate was found to be favorable for drying humid air. Moreover, when the pressure increased, the mass of absorbed water was increased, while the feed concentration had no significant effects on the membrane separation performance. However, the operating temperature had a great effect on humidity removal. It is necessary to note that the processes at room temperature can limit the energy consumption. The absorbing process of ILM remained efficient after several absorption desorption cycles. Therefore, the new ILM hybrid process that has been developed has great potential for consecutive humidity removal processes.

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“…These are the reforming and the water-gas shift reactions for an H 2 -rich gas product, and the methanation reactions for the formation of CH 4 [26]. The reforming reactions are endothermic; the water-gas shift reaction is mildly exothermic, and the methanation reactions are exothermic [87], suggesting that they are thermodynamically favored at high, moderate, and low temperatures, respectively. For the energy cycle optimization and heat recovery it is important to know the energy of these reactions.…”

Section: Supercritical Water Gasificationmentioning

confidence: 99%

“…For the energy cycle optimization and heat recovery it is important to know the energy of these reactions. The thermodynamic studies of the SCWG process are well reported in the literature by Fiori & Castello [88] and Hantoko [87]. Their thermodynamic equilibrium calculations are carried out based on Gibbs free energy minimization by using Aspen Plus software.…”

Section: Supercritical Water Gasificationmentioning

confidence: 99%

Functional Materials for Waste-to-Energy Processes in Supercritical Water

et al. 2021

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In response to increasing energy demand, various types of organic wastes, including industrial and municipal wastewaters, or biomass wastes, are considered reliable energy sources. Wastes are now treated in supercritical water (SCW) for non-fossil fuel production and energy recovery. Considering that SCW technologies are green and energetically effective, to implement them on a large scale is a worldwide interest. However, issues related to the stability and functionality of materials used in the harsh conditions of SCW reactors still need to be addressed. Here we present an overview on materials used in the SCW technologies for energy harvesting from wastes. There are catalysts based on metals or metal oxides, and we discuss on these materials’ efficiency and selectivity in SCW conditions. We focus on processes relevant to the waste-to-energy field, such as supercritical water gasification (SCWG) and supercritical water oxidation (SCWO). We discuss the results reported, mainly in the last decades in connection to the current concept of supercritical pseudo-boiling (PB), a phenomenon occurring at the phase change from liquid-like (LL) to gas-like (GL) state of a fluid. This review aims to be a useful database that provides guidelines for the selection of the abovementioned functional materials (catalysts, catalyst supports, and sorbents) for the SCW process, starting from wastes and ending with energy-relevant products.

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Thermodynamic study on the integrated supercritical water gasification with reforming process for hydrogen production: Effects of operating parameters

Cited by 67 publications

References 46 publications

Aqueous‐phase reforming of phenol over hydrotalcite‐derived Ni/Zn/Al catalysts

Aqueous‐phase reforming of phenol over hydrotalcite‐derived Ni/Zn/Al catalysts

Effects of Operating Parameters on Ionic Liquid Membrane to Remove Humidity in a Green Continuous Process

Functional Materials for Waste-to-Energy Processes in Supercritical Water

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