Tag: biochar

Peer-reviewed Publications

Li et al. (2024): Carbon Sequestration of Silica-Rich Biochar in Cement Accompanied by the Pozzolanic Effect

Yaqiang Li, Hui Lin, Yue Li, Jiale Shen, Changle Yang, Kai Wang IN: ACS Sustainable Chemistry & Engineering, 12, 37, https://doi.org/10.1021/acssuschemeng.4c03831

To meet the dual needs of decarbonization and strength in cement, this paper explored the potential of two types of silica-rich biochar, rice husk biochar rich in amorphous silica and bamboo biochar rich in crystalline silica, as carbon-negative SCMs. Here, the hydration, microstructure, and mechanical properties of rice husk biochar and bamboo biochar blended cements were investigated. Similar to bamboo biochar, rice husk biochar reduces flowability and drying shrinkage due to its porous structure. However, rice husk biochar contains a large amount of amorphous silica, resulting in the promotion of hydration of clinker and a significant pozzolanic effect, which shortens the setting time of cement, improves the weak structure and bonding interface of biochar, and further increases the hydration degree and polymerization degree of calcium silicate hydrate.

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Peer-reviewed Publications

Zhou et al. (2024): Biochar Catalysis for the Enhanced Abiotic Humification of Polyphenols: An Important Mechanism Helping Sequester Carbon

Jiangmin Zhou, Ziru Zhou, Chuanqing Yao, Yujie Zhang, Han Ren, Guining Lu, Hualin Chen IN: Agronomy, 14(9),  https://doi.org/10.3390/agronomy14091951

This study investigated the catalytic power of biochar from walnut shells at different temperatures (300 °C, 600 °C, and 900 °C) for the abiotic transformation of hydroquinone (HQ) as a representative polyphenol. All the biochar samples catalyzed HQ polymerization, resulting in the formation of humic polymers such as fulvic acids (FAs) and humic acids (HAs). The findings provide new insights into the application potential of biochar for promoting soil carbon sequestration.

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Peer-reviewed Publications

Park et al. (2024): Harnessing green tide Ulva biomass for carbon dioxide sequestration

Jihae Park, Hojun Lee, Jonas De Saeger, Stephen Depuydt, Jana Asselman, Colin Janssen, Philippe M. Heynderickx, Di Wu, Frederik Ronsse, Filip M. G. Tack, Masanori Hiraoka, Lalit K. Pandey, Ondrej Mašek, Yung Hung, Taejun Han IN: Reviews in Environmental Science and Bio/Technology,
https://doi.org/10.1007/s11157-024-09705-3

This review explores the potential repurposing of harmful Ulva blooms for carbon sequestration, addressing the critical global issue of CO2 emission. The authors conducted a comprehensive literature review and examined the conversion of shoreline Ulva biomass into biochar through pyrolysis, a process that can be implemented directly at biorefineries. This approach not only facilitates carbon sequestration but also mitigates greenhouse gas emissions and enhances soil quality through soil amendments.

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Peer-reviewed Publications

Liu et al. (2024): Investigating CO2 sequestration properties of biochar shotcrete

Guoming Liu, Lu Liu, Huamou Liu, Huiying Zheng IN: Construction and Building Materials, 443, https://doi.org/10.1016/j.conbuildmat.2024.137779 

This study investigated the effect of different biochar content on shotcrete under various curing conditions (carbonation, normal and low temperature). Flowability, compressive strength, splitting strength and microstructure of sprayed biochar shotcrete were conducted. Combined carbonation depth, thermogravimetric, and X-ray diffraction (XRD) were used to analyze the carbon sequestration of the biochar sprayed concrete materials from both macro and microscopic perspectives. In addition, the effect of low temperature on the performance of biochar shotcrete was considered.

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Peer-reviewed Publications

Liu et al (2024): Flexible strategies for carbon-negative syngas and biochar poly-generation via a novel chemical looping approach

Gen Liu, Zhongshun Sun, Zhichao Wang, Binpeng Yu, Xiantan Yang, Bo Zhang, Rongjiang Zhang, Bolun Yang, Zhiqiang Wu IN: AIChE Journal, https://doi.org/10.1002/aic.18533

This work proposed a pyrolysis chemical looping reforming-two stage regeneration (PCLR-TR) process with carbon-negative syngas and biochar poly-generation，aimed at overcoming challenges in chemical looping gasification. The process effectively separates pyrolysis and reforming, circumventing slow solid–solid reactions and enabling the flexible adjustment of the H2/CO ratio. The two-stage regeneration ensures improved synchronization of reaction rates across different reactors.

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Peer-reviewed Publications

Bergero et al. (2024): Biochar as a carbon dioxide removal strategy in integrated long-run mitigation scenarios

Candelaria Bergero, Marshall Wise, Patrick Lamers, Yong Wang, Maridee Weber IN: Environmental Research Letters 19 (7), 074076, https://doi.org/10.1088/1748-9326/ad52ab

Because of its technology readiness, relatively low cost, and potential co-benefits, the application of biochar to soils could be an effective CDR strategy. In this study the Global Change Analysis Model, a global multisector model, is used to analyze biochar deployment in the context of energy system uses of biomass with CDR under different carbon price trajectories. 

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Peer-reviewed Publications

Xiao et al. (2024): Cellulose-based aerogel derived N, B-co-doped porous biochar for high-performance CO2 capture and supercapacitor

Jianfei Xiao, Xiaofang Yuan, Weikeduo Li, Tian C. Zhang, Ge He, Shaojun Yuan IN: International Journal of Biological Macromolecules, 269, 1, 132078, https://doi.org/10.1016/j.ijbiomac.2024.132078

In this study, a novel N, B-co-doped porous biochar (NBCPB) was synthesized by carbonating and activating the N, B dual-doped cellulose aerogel. N and B atoms were doped in-situ using a modified alkali-urea method. The potassium citrate was served as both an activator and a salt template to facilitate the formation of a well-developed nanostructure. The optimized NBCPB-650-1 (where 650 corresponded to activation temperature and 1 represented mass ratio of potassium citrate activator to carbonized NBCPB-400 precursor) displayed the largest micropore volume of 0.40 cm3·g−1 and a high specific surface area of 891 m2·g−1, which contributed to an excellent CO2 adsorption capacity of 4.19 mmol·g−1 at 100 kPa and 25 °C, a high CO2/N2 selectivity, and exceptional reusability (retained >97.5 % after 10 adsorption-desorption cycles).

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Peer-reviewed Publications

Villardon et al. (2024): Enhancing carbon dioxide uptake in biochar derived from husk biomasses: Optimizing biomass particle size and steam activation conditions

A. Villardon, A. Alcazar-Ruiz, F. Dorado, L. Sanchez- Silva IN: Journal of Environmental Chemical Engineering, 12, 5, 113352, https://doi.org/10.1016/j.jece.2024.113352

This research focuses on developing activated biochars for CO2 adsorption, evaluating the impact of particle size and steam activation conditions on almond shells (AS), pistachio shells (PS), and nut shells (NS), three crops that are grown worldwide. A literature review was carried out on the characteristic parameters that a biomass must have to produce a biochar of an acceptable quality to capture CO2. Initially, a physicochemical characterization of the selected biomasses was conducted, revealing high levels of volatiles (78–84 wt%), carbon (41–53 wt%), and inherent metals (Ca, K, Mg and Na). This process involved pyrolysis and activation under pre-established conditions, followed by CO2 adsorption analysis using thermogravimetry. Once the optimal particle size was determined, steam activation conditions were further optimized by varying temperature.

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Peer-reviewed Publications

Monteagudo et al. (2024): Investigation of effectiveness of KOH-activated olive pomace biochar for efficient direct air capture of CO2

J.M. Monteagudo, A. Durán, M. Alonso, Anca-Iulia Stoica IN: Separation and Purification Technology, 352, 127997, https://doi.org/10.1016/j.seppur.2024.127997

In this work, the activation of olive pomace biochar with potassium hydroxide, KOH, has been studied for its use as a CO2 adsorbent. The effectiveness of biochar activated with KOH at 750 °C in an inert N2 atmosphere was evaluated, using different mass ratios of biochar/KOH, 1:0.5, 1:1, and 1:2. Various characterisation analyses of the biochar were performed to determine its chemical composition, specific surface area, pore size and volume, structure, morphology, and functional groups. The adsorption isotherm was determined at atmospheric pressure and a temperature of 10 °C. The experimental equilibrium results were fitted to the Langmuir, Freundlich, and Temkin models. Additionally, the kinetic behavior of biochar/KOH as an adsorbent was studied, and dynamic experiments were conducted at atmospheric pressure and 10 °C.

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Peer-reviewed Publications

Liu et al. (2024): Soil carbon sequestration increment and carbon-negative emissions in alternate wetting and drying paddy ecosystems through biochar incorporation

Chang Liu, Taotao Chen, Feng Zhang, Hongwei Han, Benji Yi, Daocai Chi IN: Agricultural Water Management, 300, 108908, https://doi.org/10.1016/j.agwat.2024.108908

How biochar incorporation converts rice paddy into carbon negative and enhances soil carbon sequestration (SOCS) remain largely unexplored, especially under alternate wetting and drying irrigation (IAWD). A 3-yr field experiment was conducted utilizing a split-plot design with continuous flooding irrigation (ICF) and IAWD as main plots and two biochar incorporations at the rate of 0 t ha−1 (B0) and 20 t ha−1 (B20) as sub-plots.

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