The influence of hydrothermal operation on the surface properties of kitchen waste-derived hydrochar: Biogas upgrading

Zhou, Ying; Engler, Nils; Li, Yeqing; Nelles, Michael

doi:10.1016/j.jclepro.2020.121020

Cited by 36 publications

(12 citation statements)

References 58 publications

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“…Very high HTC temperatures usually result in low yield of solid hydrochar while favoring higher yields of liquid and gaseous products. Table 2 [ 2 , 10 , 40 , 41 , 48 , 55 , 56 , 57 , 58 , 59 , 60 , 61 ] presents the properties of hydrochars developed from HTC of food waste under optimum conditions.…”

Section: Hydrothermal Carbonization Of Food Waste For Char Productionmentioning

confidence: 99%

“…In most studies, increasing temperature generally resulted in a higher carbon content of hydrochar at a given reaction time. A study was carried out for the HTC of food waste at different temperatures (195, 225, and 255 °C) for 12 h. The carbon content of hydrochar increased from 67.72 to 72.99% with increases in the temperature [ 55 ]. In another study involving HTC of real cooked FW (without addition of water) at a fixed reaction time (5 h), approximately 10% rise in the carbon content was observed for every 20 °C rise in reaction temperature [ 10 ].…”

Section: Hydrothermal Carbonization Of Food Waste For Char Productionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal Conversion of Food Waste to Carbonaceous Solid Fuel—A Review of Recent Developments

Khan

Hameed

Siddiqui

et al. 2022

Foods

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This review critically discussed recent developments in hydrothermal carbonization (HTC) of food waste and its valorization to solid fuel. Food waste properties and fundamentals of the HTC reactor were also covered. The review further discussed the effect of temperature, contact time, pressure, water–biomass ratio, and heating rate on the HTC of food waste on the physiochemical properties of hydrochar. Literature review of the properties of the hydrochar produced from food waste in different studies shows that it possesses elemental, proximate, and energy properties that are comparable to sub-bituminous coal and may be used directly as fuel or co-combusted with coal. This work conclusively identified the existing research gaps and provided recommendation for future investigations.

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Section: Hydrothermal Carbonization Of Food Waste For Char Productionmentioning

confidence: 99%

Section: Hydrothermal Carbonization Of Food Waste For Char Productionmentioning

confidence: 99%

Hydrothermal Conversion of Food Waste to Carbonaceous Solid Fuel—A Review of Recent Developments

Khan

Hameed

Siddiqui

et al. 2022

Foods

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“…that kitchen waste, animal waste, agricultural waste, forestry waste, waste plastics and waste tyres can be converted into clean energy through advanced technologies such as thermochemical conversion or hydrothermal carbonisation [10,[66][67][68][69][70]. Research on improving these conversion technologies is a trending research hotspot.…”

Section: Plos Onementioning

confidence: 99%

A systematic bibliometric review of clean energy transition: Implications for low-carbon development

Zhang

Xue

et al. 2021

PLoS ONE

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More voices are calling for a quicker transition towards clean energy. The exploration and exploitation of clean energy such as wind energy and solar energy are effective means to optimise energy structure and improve energy efficiency. To provide in-depth understanding of clean energy transition, this paper utilises a combination of multiple bibliometric mapping techniques, including HistCite, CiteSpace and R Bibliometrix, to conduct a systematic review on 2,191 clean energy related articles obtained from Web of Science (WoS). We identify five current main research streams in the clean energy field, including Energy Transition, Clean Energy and Carbon Emission Policy, Impact of Oil Price on Alternative Energy Stocks, Clean Energy and Economics, and Venture Capital Investments in Clean Energy. Clearly, the effectiveness of policy-driven and market-driven energy transition is an important ongoing debate. Emerging research topics are also discussed and classified into six areas: Clean Energy Conversion Technology and Biomass Energy Utilisation, Optimisation of Energy Generation Technology, Policy-Making in Clean Energy Transition, Impact of Clean Energy Use and Economic Development on Carbon Emissions, Household Use of Clean Energy, and Clean Energy Stock Markets. Accordingly, more and more research attention has been paid to how to improve energy efficiency through advanced clean energy technology, and how to make targeted policies for clean energy transition and energy market development. This article moves beyond the traditional literature review methods and delineates a systematic research agenda for clean energy research, providing research directions for achieving low-carbon development through the clean energy transition.

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“…It is favoured if the feedstock has a higher moisture content as no drying process is required (Y. Wang et al, 2019b;ZHOU et al, 2020). Compared to the above methods, gasification produces syngas as the main product, while biochar is the by-product with less yield.…”

Section: Introductionmentioning

confidence: 99%

Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

Johnravindar

Patria

Lee

et al. 2021

Sustainable Environment

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Biochar as a biomass derived, low cost, carbon conductive material is considered as an important supplement in the anaerobic digestion (AD) of organic matter. It functions as an electrical grid to allow direct electron transfer from fatty acid oxidizers to methanogenic archaea, thereby promoting syntophy between various microbial groups and leading to efficient methanogenesis. Specific properties of biochar play an important role in promoting syntrophic interactions in AD. As a physical indicator, surface area, porosity, particle size and surface texture of biochar play an important role in governing microbial attachment and enrichment on biochar. This influences the microbial degradation of fatty acids and their subsequent conversion to methane by methanogens. Chemical properties such as the presence of hydrophobic functional groups, molecular nature and redox active groups on biochar surface promote interaction between biochar and microorganisms and provide an increased degree of electron transfer between the attached microorganisms. The above characteristics depend on feedstock and pyrolysis conditions used for biochar production. Unlike previous reviews, herein the desired physical and chemical properties of biochar that promote syntrophy in AD and the factors that influence them have been discussed in detail. Furthermore, engineering of biochar properties by various activation methods to harness favourable characteristics of biochar as an effective AD additive is described. Such a comprehensive account would be useful for engineering efficient biochar-mediated digestions with enhanced syntrophy and overall AD performance.

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The influence of hydrothermal operation on the surface properties of kitchen waste-derived hydrochar: Biogas upgrading

Cited by 36 publications

References 58 publications

Hydrothermal Conversion of Food Waste to Carbonaceous Solid Fuel—A Review of Recent Developments

Hydrothermal Conversion of Food Waste to Carbonaceous Solid Fuel—A Review of Recent Developments

A systematic bibliometric review of clean energy transition: Implications for low-carbon development

Syntrophic interactions in anaerobic digestion: how biochar properties affect them?

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