Biofuel production from supercritical water gasification of sustainable biomass

Ortiz, F.J. Gutiérrez

doi:10.1016/j.ecmx.2021.100164

Cited by 11 publications

(6 citation statements)

References 137 publications

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“…In fact, and as a final note, although the temperature at the SCWG reactor inlet should be as close to the reaction temperature (800 • C in this study) as possible to save more energy, in practice, the temperature achieved in the train of heat exchangers, represented by HE01 in this study, is usually lower, approximately 350-400 • C, rather than 800 • C, especially if the product leaving the SCW reactor passes through an expander to produce electrical energy, as proposed in previous studies published by the authors and other researchers [3]. Sensitivity analysis for the thermal power (heat load) of the SCWG of orange peel for ARR-6 at different concentrations (wt.%) and temperatures ( • C); (concentration@temperature).…”

Section: Resultssupporting

confidence: 59%

“…Another relevant aspect in chemical process simulation is energy integration, particularly if the process is energy-intensive, such as supercritical water gasification (SCWG), which is a developing technology that is very suitable for dealing with biomass or organic waste containing a large amount of water thanks to the special properties of supercritical water (SCW) [1][2][3]. The special properties of supercritical water lead to a high carbon-to-gas conversion and hydrogen yield, which is also predicted by thermodynamic calculations, and this has been achieved effectively with a suitable catalyst [4].…”

Section: Introductionmentioning

confidence: 99%

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A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Gutiérrez Ortiz,

López-Guirao

2024

Applied Sciences

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Solid biomass is usually simulated by decomposing it into a solid phase (carbon, ash, and sulfur) and a gas phase (water and diatomic molecules of H2, N2, O2, and Cl2) from the proximate and ultimate analysis before entering a reactor operating under chemical equilibrium when using Aspen Plus. However, this method prevents the use of energy integration for the feed stream from the system inlet to the reactor. This paper proposes an approach to solving this issue, considering biomass with both known and unknown chemical compositions; the latter involves the decomposition of biomass into complex molecular compounds. Different process arrangements were assessed to achieve a realistic simulation, and a sensitivity analysis was carried out to examine the effect of the concentration and heating upstream of the reactor, focused on supercritical water gasification (SCWG) of orange peel. This process is very energy-intensive, so the approach is useful for a better calculation of the energy requirement and exergy losses in a plant; these are usually and mainly related to the train of heat exchangers. In addition to this application to SCWG, this approach can be used for any other thermochemical process, such as gasification, pyrolysis, or combustion, and for any real biomass. Upon a base case study using a wet biomass of 10,000 kg/h with 90 wt.% water where the SCWG reaction takes place at 240 bar and 800 °C, if the temperature at the SCWG reactor inlet increases from 350 °C to 400 °C, the heat exchange increases by 57% from 4 MW and by 34% if the water content decreases to 70 wt.%, although more heat relative to the solid is saved.

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Gutiérrez Ortiz,

López-Guirao

2024

Applied Sciences

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“…Furthermore, the typical high H 2 to CO ratio of the SWCG process can further contribute to the economic viability of the process (Gutiérrez Ortiz et al, 2013;Pinkard et al, 2018). Nonetheless, despite the aforementioned potential benefits, several operability challenges remain to be addressed to achieve economic viability at commercial scales, including char formation, inorganic salt deposition, and material compatibility requirements for high-pressure and high-temperature operation (Ciuffi et al, 2020;Gutiérrez Ortiz, 2022).…”

Section: Supercritical Water Gasification (Scwg)mentioning

confidence: 99%

Emerging technologies for catalytic gasification of petroleum residue derived fuels for sustainable and cleaner fuel production—An overview

et al. 2023

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“…Gasification is a thermochemical biomass-to-gas technology that transforms organics into a gas phase mostly consisting of syngas (a mixture of H 2 and CO) along with a small amount of CH 4 , CO 2 , C 2 H 2 , C 2 H 4 and C 2 H 6 [ 111 ]. Although the main product of gasification is syngas, char and a trace amount of tar are also produced, depending on process conditions such as temperature, pressure, reaction time, equivalence ratio, feedstock concentration, catalysts and gasifier type [ 112 ]. Gasification is an appealing process over other thermochemical technologies because it produces H 2 , which can decrease energy loss during combustion in power plants due to its superior calorific value of 120–142 MJ/kg.…”

Section: Gasificationmentioning

confidence: 99%

Perspectives on Thermochemical Recycling of End-of-Life Plastic Wastes to Alternative Fuels

et al. 2023

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Due to its resistance to natural degradation and decomposition, plastic debris perseveres in the environment for centuries. As a lucrative material for packing industries and consumer products, plastics have become one of the major components of municipal solid waste today. The recycling of plastics is becoming difficult due to a lack of resource recovery facilities and a lack of efficient technologies to separate plastics from mixed solid waste streams. This has made oceans the hotspot for the dispersion and accumulation of plastic residues beyond landfills. This article reviews the sources, geographical occurrence, characteristics and recyclability of different types of plastic waste. This article presents a comprehensive summary of promising thermochemical technologies, such as pyrolysis, liquefaction and gasification, for the conversion of single-use plastic wastes to clean fuels. The operating principles, drivers and barriers for plastic-to-fuel technologies via pyrolysis (non-catalytic, catalytic, microwave and plasma), as well as liquefaction and gasification, are thoroughly discussed. Thermochemical co-processing of plastics with other organic waste biomass to produce high-quality fuel and energy products is also elaborated upon. Through this state-of-the-art review, it is suggested that, by investing in the research and development of thermochemical recycling technologies, one of the most pragmatic issues today, i.e., plastics waste management, can be sustainably addressed with a greater worldwide impact.

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Biofuel production from supercritical water gasification of sustainable biomass

Cited by 11 publications

References 137 publications

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

A Practical Approach to Using Energy Integration in the Simulation of Biomass Thermochemical Processes: Application to Supercritical Water Gasification

Emerging technologies for catalytic gasification of petroleum residue derived fuels for sustainable and cleaner fuel production—An overview

Perspectives on Thermochemical Recycling of End-of-Life Plastic Wastes to Alternative Fuels

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