Conversion of water hyacinth to value-added fuel via hydrothermal carbonization

Zhang, Chaoyue; Ma, Xiaoqian; Chen, Xinfei; Tian, Ye; Zhou, Yi; Lu, Xiaoluan; Huang, Tao

doi:10.1016/j.energy.2020.117193

Cited by 44 publications

(27 citation statements)

References 35 publications

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“…Therefore, NO x emissions are likely to be feedstock dependent, with the mechanisms of NO x emissions from alternative feedstocks; such as WH and hydrochars, requiring further investigation. Despite this, Zhang et al [22] suggest WH hydrochars show reduced NO x emissions compared to untreated WH. The C:N ratio of untreated WH was 14:1; below the optimal ratio for AD 25-30:1 [63].…”

Section: Composition Of Untreated Wh and Hydrocharsmentioning

confidence: 97%

“…Sulphur was not detected in any of the hydrochar samples; suggesting SO x emissions would be negligible. Zhang et al [22] showed low levels of SO 2 from the combustion of WH, with WH hydrochars showing further reduced SO 2 emissions, especially hydrochars produced at higher temperatures (210-270 • C). The nitrogen content of untreated WH; 2.7%, is relatively high compared to other lignocellulosic biomasses such as; willow, miscanthus, oak wood, and greenhouse waste [29].…”

Section: Composition Of Untreated Wh and Hydrocharsmentioning

confidence: 99%

“…Hydrochar is typically used as a solid combustion fuel [19], but has a multitude of alternative applications, including soil amendment, energy storage and as an absorbent [19,21]. Recent studies have been reported on the HTC of WH [22][23][24]; these being largely focused on the generation and characteristics of the hydrochar; with applications as a combustion fuel or for CO 2 sequestration. The combustion properties of fresh WH are not ideal; due to a high moisture content, high inorganic content and low calorific value.…”

Section: Introductionmentioning

confidence: 99%

“…HTC is suited towards high moisture feedstocks, due to the use of water as a reactant media. Typically, the calorific value of dried WH ranges from between 13.78-14.68 MJ/kg [22][23][24]. Previous studies have investigated the production of biomass pellets [26] and briquettes [28] from WH for combustion.…”

Section: Introductionmentioning

confidence: 99%

“…However, WH pellets and briquettes offer little in the way of energy densification; with the calorific value of WH pellets between 14.24-14.69 MJ/kg [26] and WH briquettes in a range from 14.55-14.58 MJ/kg [27,28]. Whereas hydrochar produced from WH can show increased energy densification [22][23][24]; up to a calorific value around 21 MJ/kg [23]. An additional issue identified from WH pellet production is the high ash concentration and chloride content [26].…”

Section: Introductionmentioning

confidence: 99%

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An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

et al. 2020

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Water hyacinth (WH) is an invasive aquatic macrophyte that dominates freshwater bodies across the world. However, due to its rapid growth rate and wide-spread global presence, WH could offer great potential as a biomass feedstock, including for bioenergy generation. This study compares different integration strategies of hydrothermal carbonisation (HTC) and anaerobic digestion (AD) using WH, across a range of temperatures. These include (i) hydrochar combustion and process water digestion, (ii) hydrochar digestion, (iii) slurry digestion. HTC reactions were conducted at 150 °C, 200 °C, and 250 °C. Separation of hydrochars for combustion and process waters for digestion offers the most energetically-feasible valorisation route. However, hydrochars produced from WH display slagging and fouling tendencies; limiting their use in large-scale combustion. AD of WH slurry produced at 150 °C appears to be energetically-feasible and has the potential to also be a viable integration strategy between HTC and AD, using WH.

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Section: Composition Of Untreated Wh and Hydrocharsmentioning

confidence: 97%

Section: Composition Of Untreated Wh and Hydrocharsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

et al. 2020

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Electrochemical Stability of Platinum Nanoparticles Supported on N‐Doped Hydrothermal Carbon Aerogels as Electrocatalysts for the Oxygen Reduction Reaction

et al. 2021

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Sustainable N-doped carbon aerogels were synthesized by a scalable hydrothermal approach using low-cost and abundant precursors such as glucose and ovalbumin. By adjusting the pyrolysis temperature (900-1500 °C), the surface chemistry, porosity and conductivity of these aerogels could be optimized for the design of Pt-based oxygen reduction reaction (ORR) catalysts with high Pt loading (40 wt % Pt) and improved stability. Pt nanoparticle deposition was realized by wet impregnation followed by thermal reduction and their size and distribution was found to strongly depend on the surface chemistry of the carbon aerogels. The catalysts' activities and stabilities, determined by rotating disc electrode measurements in HClO 4 , were found to strongly depend on the pyrolysis temperature of the N-doped carbon aerogel supports. While the mass activity decreased with increasing temperature, in line with a decreasing ECSA related to an increase in Pt nanoparticle size, the long-term stability of the catalysts, as revealed by accelerated stress tests for carbon support degradation (10,000 cycles), increased with increasing pyrolysis temperature, in line with increasing Pt nanoparticle sizes and increasing graphitization of the carbon aerogel supports. Most importantly, the catalyst derived from aerogels pyrolyzed at 1000 °C achieved a good compromise between activity and stability and revealed a superior ORR activity after the accelerated stress test in comparison to a commercially available Pt/C reference catalyst (40 wt % Pt).

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Investigation of the Effects of Cohydrothermal Carbonization on the Physicochemical Characteristics and Combustion Behavior of Straw Hydrochars

Sui

Shi

et al. 2023

Energy Tech

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The use of straw biomass for energy can reduce the use of fossil energy and alleviate air pollution. Herein, the cohydrothermal carbonization (Co‐HTC) of rice straw and wheat straw with corn straw is investigated, and synergistic effects of multistraw biomass are observed in the Co‐HTC process. When the corn straw ratio is 75%, the energetic recovery efficiency, C content, and heating value increase compared to the calculated values of the Co‐HTC products. At 260 °C, the energetic recovery efficiency increases by 8.96% and the heating value increases by 2.28 MJ kg−1, which is beneficial for its application. The positive synergistic effect is probably caused by the enhanced dehydration and decarboxylation reactions. For the combustion behavior analysis, the entire combustion process is divided into two stages. When the corn straw ratio is greater than 50%, compared to the calculated values of the Co‐HTC products, the comprehensive combustibility index and activation energy of stage I increase and the activation energy of stage II decreases at 180 °C, while the activation energy of stage I decreases and the activation energy of stage II increases at 260 °C. These findings demonstrate that the Co‐HTC of multistraw biomass is suitable for solid biofuel production.

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Conversion of water hyacinth to value-added fuel via hydrothermal carbonization

Cited by 44 publications

References 35 publications

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

Electrochemical Stability of Platinum Nanoparticles Supported on N‐Doped Hydrothermal Carbon Aerogels as Electrocatalysts for the Oxygen Reduction Reaction

Investigation of the Effects of Cohydrothermal Carbonization on the Physicochemical Characteristics and Combustion Behavior of Straw Hydrochars

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