Pyrolysis of engineered beach-cast seaweed: Performances and life cycle assessment

Wen, Yuming; Wang, Shule; Jin, Yanghao; Thomas, Jean‐Baptiste; Azzi, Elias Sebastian; Franzén, Daniel; Gröndahl, Fredrik; Tang, Chuchu; Mu, Wangzhong; Jönsson, Pär G.; Yang, Weihong

doi:10.1016/j.watres.2022.118875

Cited by 14 publications

(2 citation statements)

References 57 publications

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“…According to the thermogravimetric analysis (TGA), at the temperature below 350°C, the weight reductions of MB (18.55%) and MB hydrochar (3.36%) are ascribed to the dehydration via water molecule volatilization, respectively (Fig. 2c and Supplementary Table 3) 31 . When the temperature increased from 350 to 750°C, the weight losses of MB and MB hydrochar achieved 78.22% and 90.96% due to organics combustion, respectively 32 .…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal converting quinonimine dye into pyrrolic-N for sustainable activated carbon regeneration

Wang

Qian

Chen

et al. 2022

Preprint

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Activated carbon (AC) adsorption is a prevalent method for printing and dyeing wastewater (PDW) treatment, but restricted by adsorption active site depletion. The regeneration by thermal desorption or chemical oxidation is liable to destroy carbon structure as well as consume carbon composition, leading to few service cycles. Herein, we establish a sustainable hydrothermal regeneration for methylene blue (MB) exhausted AC. The absorbed MB was converted to its pyrrolic-N-containing hydrochar attached on regenerated AC, supporting 11 adsorption-regeneration cycles caused by the property shift from physical to chemical adsorption. Meanwhile, pyrrolic-N could reduce Cr(VI) to Cr(III) over a wide pH range of 3.0-9.0 via direct electron donation, and enabled recycling final regenerated AC once more. This approach is tailored to the dyes with the same quinonimine group as MB. So, the carbon capture for the simultaneous removal of dye and Cr(VI) in PDW can be implemented, while providing a novel green methodology to fabricate pyrrolic-N-loaded carbon material.

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Section: Resultsmentioning

confidence: 99%

Hydrothermal converting quinonimine dye into pyrrolic-N for sustainable activated carbon regeneration

Wang

Qian

Chen

et al. 2022

Preprint

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“…Wen et al ( 2022 ) assessed the life cycle of beach-cast seaweed through pyrolysis. The authors found that pyrolysis of washed seaweed at 600 °C could result in carbon emission of—790.89 kg of carbon dioxides equivalent and negative overall energy demand of—2.98 gigajoules.…”

Section: Use Of Seaweed For Biochar Productionmentioning

confidence: 99%

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

et al. 2022

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The development and recycling of biomass production can partly solve issues of energy, climate change, population growth, food and feed shortages, and environmental pollution. For instance, the use of seaweeds as feedstocks can reduce our reliance on fossil fuel resources, ensure the synthesis of cost-effective and eco-friendly products and biofuels, and develop sustainable biorefinery processes. Nonetheless, seaweeds use in several biorefineries is still in the infancy stage compared to terrestrial plants-based lignocellulosic biomass. Therefore, here we review seaweed biorefineries with focus on seaweed production, economical benefits, and seaweed use as feedstock for anaerobic digestion, biochar, bioplastics, crop health, food, livestock feed, pharmaceuticals and cosmetics. Globally, seaweeds could sequester between 61 and 268 megatonnes of carbon per year, with an average of 173 megatonnes. Nearly 90% of carbon is sequestered by exporting biomass to deep water, while the remaining 10% is buried in coastal sediments. 500 gigatonnes of seaweeds could replace nearly 40% of the current soy protein production. Seaweeds contain valuable bioactive molecules that could be applied as antimicrobial, antioxidant, antiviral, antifungal, anticancer, contraceptive, anti-inflammatory, anti-coagulants, and in other cosmetics and skincare products.

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Pyrolysis of brown macroalgae Dictyota dichotoma and its thermokinetic analysis

Imran

Badshah

Alves

et al. 2023

Biomass Conv. Bioref.

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Pyrolysis of engineered beach-cast seaweed: Performances and life cycle assessment

Cited by 14 publications

References 57 publications

Hydrothermal converting quinonimine dye into pyrrolic-N for sustainable activated carbon regeneration

Hydrothermal converting quinonimine dye into pyrrolic-N for sustainable activated carbon regeneration

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

Pyrolysis of brown macroalgae Dictyota dichotoma and its thermokinetic analysis

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