Co-gasification of woody biomass and chicken manure: Syngas production, biochar reutilization, and cost-benefit analysis

Ng, Wei Cheng; You, Siming; Ran, Ling; Gin, Karina Yew-Hoong; Dai, Yanjun; Wang, Chi-Hwa

doi:10.1016/j.energy.2017.07.165

Cited by 87 publications

(20 citation statements)

References 62 publications

(72 reference statements)

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“…The economic analysis of biochar-based materials plays an essential role in their further development and commercial applications (Ng et al 2017). In particular, low cost is one of the key advantages of biochar-based materials and usually emphasized in the design and fabrication process.…”

Section: Economic Analyses Of Biochar-based Materialsmentioning

confidence: 99%

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Huang

Song

Chen

et al. 2019

Biochar

289

104

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As a class of famous carbon materials, biochars (BCs) and their derivative materials with excellent physicochemical properties and diversified functionalities present great potential in wastewater treatment fields. This review focuses on the latest development in reported biochar-based materials as superior adsorbents or catalysts for removing harmful organic contaminants from wastewater. The construction and properties of biochar-based materials are briefly introduced at the beginning. As one of the major factors affecting the properties of BCs, the wide diversity of feedstocks, such as agricultural and forest residues, industrial by-products as well as municipal wastes, endows BCs different chemical compositions and structures. Woody and herbaceous BCs usually have higher carbon contents, larger surface areas and strong aromaticity, which is in favor of the organic contaminant removal. Driven by the desire of more cost-effective materials, several types of biochar-based hybrid materials, such as magnetic BC composites (MBC), nanometal/nanometallic oxides/hydroxide BC composites and layered nanomaterial-coated BCs, as well as physically/chemically activated BCs, have also been developed. With the help of foreign materials, these types of hybrid BCs have excellent capacities to remove a wide range of organic contaminants, including organic dyestuff, phenols and chemical intermediates, as well as pharmaceutically active compounds, from aquatic solutions. Depending on the different types of biochar-based materials, organic contaminants can be removed by different mechanisms, such as physical adsorption, electrostatic interaction, π-π interaction and Fenton process, as well as photocatalytic degradation. In summary, the low cost, tunable surface chemistry and excellent physical-chemical properties of BCs allow it to be a potential material in organic contaminant removal. The combination of BCs with foreign materials endows BCs more functionalities and broader development opportunities. Considering the urgent demand of practical wastewater treatment, we hope more researches will focus on the applications and commercialization of biochar-based materials.

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Section: Economic Analyses Of Biochar-based Materialsmentioning

confidence: 99%

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Huang

Song

Chen

et al. 2019

Biochar

289

104

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“…Some publications indicated biochar market prices via surveys (Galgani, van der Voet, & Korevaar, 2014;Ji, Cheng, Nayak, & Pan, 2018;Ng et al, 2017;You, Tong, Armin-Hoiland, Tong, & Wang, 2017;Zhang et al, 2017) or adopted market consumer prices without sources (Liu, Liu, Yousaf, & Abbas, 2018). These publications did not consider how biochar may have provided value to the user.…”

Section: Systematic Reviewmentioning

confidence: 99%

Biochar's cost constraints are overcome in small‐scale farming on tropical soils in lower‐income countries

et al. 2020

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Biochar has been lauded for its potential to mitigate climate change, increase crop yields and reverse land degradation in tropical agricultural systems. Despite its benefits, confusion persists about whether the use of biochar is financially feasible as a soil ameliorant. A comprehensive review of previous studies of biochar's financial feasibility was performed (33 relevant publications). Financial performance appraisal (US$ Mg-1 biochar) and greenhouse gas abatement cost estimates (US$ Mg-1 CO2e) were used to gauge the financial feasibility of the biochar scenarios within each publication. Ordinary Least Squares Multiple Linear Regression was used to evaluate the predictive capacity of scenario financial feasibility as dependent on variables including national income levels, This article is protected by copyright. All rights reserved. climatic conditions, pyrolysis technology scales and pyrolysis capabilities. Analysis revealed that scenarios where biochar was applied targeting yield increases in high-value crops in tropical locations with low incomes and biochar-focused small-scale production, were overall significant predictors of biochar scenario financial feasibility. We find that the average abatement cost of biochar applied in 'lower-income countries' is-US$58 Mg-1 CO2e (financially feasible) compared with +US$93 Mg-1 CO2e in 'higher-income countries' (not financially feasible). Climate policies of lower-income countries in tropical climates should consider biochar as an input for small-scale climate smart agriculture to address land degradation in tropical agricultural systems. Based on recent evidence it is suggested that biochar fertilizers, a value-added biochar product, could present a commercially feasible pathway for biochar value-chain development in higher-income countries.

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“…However, most existing models focus only on the prediction of temperature profile and syngas composition without considering biochar production [7,11,[14][15][16]. Besides syngas, biochar is another valuable product from the gasification process due to its potential ability of improving soil quality and sequestering carbon [17][18][19]. To predict biochar production, the heat and mass transfer on a particle level needs to be considered.…”

Section: Introductionmentioning

confidence: 99%

Biomass gasification for syngas and biochar co-production: Energy application and economic evaluation

et al. 2018

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Syngas and biochar are two main products from biomass gasification. To facilitate the optimization of the energy efficiency and economic viability of gasification systems, a comprehensive fixed-bed gasification model has been developed to predict the product rate and quality of both biochar and syngas. A coupled transient representative particle and fixbed model was developed to describe the entire fixed-bed in the flow direction of primary air. A three-region approach has been incorporated into the model, which divided the reactor into three regions in terms of different fluid velocity profiles, i.e. natural convection region, mixed convection region, and forced convection region, respectively. The model could provide accurate predictions against experimental data with a deviation generally smaller than 10%. The model is applicable for efficient analysis of fixed-bed biomass gasification under variable operating conditions, such as equivalence ratio, moisture content of feedstock, and air inlet location. The optimal equivalence ratio was found to be 0.25 for maximizing the economic benefits of the gasification process.

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Co-gasification of woody biomass and chicken manure: Syngas production, biochar reutilization, and cost-benefit analysis

Cited by 87 publications

References 62 publications

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Biochar's cost constraints are overcome in small‐scale farming on tropical soils in lower‐income countries

Biomass gasification for syngas and biochar co-production: Energy application and economic evaluation

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