Municipal waste leachate conversion via catalytic supercritical water gasification process

Molino, Antonio; Migliori, Massimo; Blasi, Alessandro; Davoli, Mariano; Marino, Tiziana; Chianese, Simeone; Catizzone, Enrico; Giordano, G.

doi:10.1016/j.fuel.2017.05.091

“…There are variousp ractical examples in which the produced MSW actually needs to be transported by ship to distant areas,w ith large impact on costs. In this case, it may be worthy to have ag asification technology, such as that in nearly supercritical water, [15,16] which is more compact than the high temperature gasification discussed below.At arget product of syngas upgrading could be methane, in this case, because it can be distributed in the island forl ocal heating uses. Typically,t hese islands are not reach by the naturalg as grid and thus local substituted natural gas could be an added value.…”

Section: Waste Biorefinerymentioning

confidence: 99%

Waste to Chemicals for a Circular Economy

Iaquaniello

¹

,

Centi

²

,

Salladini

³

et al. 2018

Chemistry A European J

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The implementation of a circular economy is a fundamental step to create a greater and more sustainable future for a better use of resources and energy. Wastes and in particular municipal solid waste represent an untapped source of carbon (and hydrogen) to produce a large range of chemicals from methane to alcohols (as methanol or ethanol) or urea. The waste to chemical process and related economics are assessed in this concept article to show the validity of such solution both from an economic point of view and from an environmental perspective considering the sensible reduction in greenhouse gas emissions with respect to conventional production from fossil fuels.

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“…The exergy due to mass flow is contributed by physical exergy, chemical exergy and mixing exergy as shown on the right-hand side of Equation (19). For second-law efficiency, this is generally defined as the ratio of exergy recovered to the exergy supplied, In addition to the reactant conversion and product yield, energy and exergy analyses based on the resulting product stream flowing out of the TR reactor are also carried out.…”

Section: Process Simulationmentioning

confidence: 99%

“…The exergy due to mass flow is contributed by physical exergy, chemical exergy and mixing exergy as shown on the right-hand side of Equation (19). For second-law efficiency, this is generally defined as the ratio of exergy recovered to the exergy supplied,…”

Section: Process Simulationmentioning

confidence: 99%

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Analysis of Syngas Production from Biogas via the Tri-Reforming Process

Chein

¹

,

Hsu

²

2018

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Abstract:The tri-reforming process was employed for syngas production from biogas at elevated pressures in this study. In the tri-reforming process, air and water were added simultaneously as reactants in addition to the main biogas components. The effects of various operating parameters such as pressure, temperature and reactant composition on the reaction performance were studied numerically. From the simulated results, it was found that methane and carbon dioxide conversions can be enhanced and a higher hydrogen/carbon monoxide ratio can be obtained by increasing the amount of air. However, a decreased hydrogen yield could result due to the reverse water-gas shift reaction. A higher level of methane conversion and hydrogen/carbon monoxide ratio can be obtained with increased water addition.

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“…However, for the compounds containing both nitro-and amino-groups, only nitrogen was observed. Molino et al (2017) used a two-step approach for the production of synthetic natural gas (SNG) from municipal waste leachate (MWL). The initial step of the reaction was gasification of MWL in supercritical conditions followed by a catalytic process using G1-85 BASF as the catalyst to convert syngas to SNG, which the methane content was up to 50% v/v.…”

mentioning

confidence: 99%