In situ catalytic pyrolysis of Jatropha wastes using ZSM-5 from hydrothermal alkaline fusion of fly ash

Vichaphund, Supawan; Wimuktiwan, Panida; Sricharoenchaikul, Viboon; Atong, Duangduen

doi:10.1016/j.jaap.2019.01.020

Cited by 40 publications

(26 citation statements)

References 58 publications

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“…On the other hand, the organic fraction of the pyrolysis liquid of WTs presented a prevailing fraction of aromatics (more than 90 r.a.%), followed by a significant proportion of cyclic hydrocarbons (6.2 r.a.%). The more relevant aromatic components of the liquid fraction were also identified, which were benzene and benzene-derived compounds (toluene, xylene, ethyl-benzene, and styrene) [61]. A list of the main identified components can be found in the supporting information in Tables S4 and S5.…”

Section: Gc-msmentioning

confidence: 99%

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

et al. 2019

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The catalytic co-pyrolysis of grape seeds and waste tyres for the production of high-quality bio-oils was studied in a pilot-scale Auger reactor using different low-cost Ca-based catalysts. All the products of the process (solid, liquid, and gas) were comprehensively analysed. The results demonstrate that this upgrading strategy is suitable for the production of better-quality bio-oils with major potential for use as drop-in fuels. Although very good results were obtained regardless of the nature of the Ca-based catalyst, the best results were achieved using a high-purity CaO obtained from the calcination of natural limestone at 900 °C. Specifically, by adding 20 wt% waste tyres and using a feedstock to CaO mass ratio of 2:1, a practically deoxygenated bio-oil (0.5 wt% of oxygen content) was obtained with a significant heating value of 41.7 MJ/kg, confirming its potential for use in energy applications. The total basicity of the catalyst and the presence of a pure CaO crystalline phase with marginal impurities seem to be key parameters facilitating the prevalence of aromatisation and hydrodeoxygenation routes over the de-acidification and deoxygenation of the vapours through ketonisation and esterification reactions, leading to a highly aromatic biofuel. In addition, owing to the CO2-capture effect inherent to these catalysts, a more environmentally friendly gas product was produced, comprising H2 and CH4 as the main components.

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Section: Gc-msmentioning

confidence: 99%

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

et al. 2019

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“…Soongprasit et al [19] synthesized ZSM-5 zeolite from fly ash by the alkali hydrothermal method, however, the ZSM-5 zeolite was impure associated with wairakite. Vichaphund et al [20] prepared ZSM-5 zeolite from fly ash, which was also pretreated by hydrothermal alkaline fusion.…”

Section: Introductionmentioning

confidence: 99%

“…It consists primarily of an amorphous aluminosilicate glass. Thus, in the above studies, fly ash was usually pretreated by dissolution of its crystalline and amorphous phases in alkaline such as NaOH and KOH in order to make the Si and Al available for the formation of zeolite framework during the crystallization, as summarized in previous literature [20]. Though several works were widely studied on the synthesis of ZSM-5 from fly ash, there have been few reports focusing on ZSM-5 derived from ash without alkali fusion pretreatment [15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZSM-5 Zeolite Using Coal Fly Ash as an Additive for the Methanol to Propylene (MTP) Reaction

et al. 2019

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Using ZSM-5 zeolites as catalysts for the methanol to propylene (MTP) reaction is being widely investigated and has been industrially applied. In this study, pure ZSM-5 zeolite was successfully synthesized by a direct hydrothermal method using the fly ash of coal gasification as an additional raw material. Various analysis methods such as X-ray diffraction, N2 sorption, scanning electron microscopy, and infrared spectroscopy, were employed to characterize the physicochemical properties of parent and modified zeolites. Then, the prepared ZSM-5 catalysts were tested in the MTP reaction. The results showed that pure ZSM-5 could be directly synthesized in the optimized conditions using fly ash as additional silicon and aluminum sources, and those ZSM-5 catalysts turned out to be candidate catalysts for the MTP reaction. Whereas their catalytic lifetimes were not good enough due to the strong acid sites and needed improving.

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“…In addition, the synthetic zeolite from FA was widely used to treat gaseous pollutants such as sulfur dioxide [18], nitric oxide, nitrogen dioxide, nitrous oxide, and carbon monoxide [19]. At present, there are many reports about the synthesis of ZSM-5 zeolite from FA [20][21][22][23][24]. ZSM-5 has high Si/Al ratio and is hydrophobic, and it has good affinity for organic compounds in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZSM-5 zeolite from fly ash and its adsorption of phenol, quinoline and indole in aqueous solution

Liu

2020

Mater. Res. Express

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This work tries to synthesize ZSM-5 zeolite using fly ash (FA) by hydrothermal method and study the adsorption effect of the zeolite on phenol, quinoline and indole in aqueous solution. The zeolites were characterized with x-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray fluorescence (XRF), fourier transformation infrared (FTIR) and N 2 adsorption-desorption isotherm. The characterization results showed that HZSM-5 zeolite was successfully synthesized. The higher mass ratio of sodium carbonate to fly ash during melting is beneficial to improve the purity of ZSM-5 zeolite and its removal rate of organic matters. These results have been confirmed by XRD and principal component analysis (PCA). The adsorption process of phenol, quinoline and indole in aqueous can be well described with the double exponential kinetic model. The adsorption capacity of ZSM-5 zeolite for phenol, quinoline and indoles can be up to 24.41 mg g −1 , 35.99 mg l −1 and 34.05 mg g −1 respectively, and the removal rates can reach up to 82.80%, 84.86% and 83.20% respectively. The optimal pH value for adsorption ranges from 5 to 7.

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In situ catalytic pyrolysis of Jatropha wastes using ZSM-5 from hydrothermal alkaline fusion of fly ash

Cited by 40 publications

References 58 publications

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Synthesis of ZSM-5 Zeolite Using Coal Fly Ash as an Additive for the Methanol to Propylene (MTP) Reaction

Synthesis of ZSM-5 zeolite from fly ash and its adsorption of phenol, quinoline and indole in aqueous solution

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