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Biomass/sludge co-pyrolysis contributes to the high-efficiency resource utilization, harmless treatment, and reduction in volume of sludge. Due to the complexity of co-pyrolysis reaction, it is essential to evaluate the thermodynamic behavior, synergy, and reaction mechanism of this process to make it commercially viable. In this work, the pyrolysi...
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Developing and fabricating cost‐effective materials for efficient thermocatalytic reduction of CO2 to CO under mild conditions is a promising and practical way to sustainable and green low‐carbon energy systems, which remains a challenge. Herein, a facile high‐temperature pyrolysis strategy for the synthesis of efficient ultrathin nitrogen‐modified...
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... The thermal decomposition of AV mycelial residues was investigated by TG-DTG analysis, and the results are shown in Figure 2. According to the inflection points shown in the TG and DTG curves, the pyrolysis of AV can be approximately divided into five stages. The first stage started from room temperature to 165 • C, mainly caused by the evaporation of water and light volatiles in the mycelial residues [25]. In the second stage, most of the organic matter such as carbohydrate, protein, and aliphatic compounds decomposed at a temperature interval from 165 • C to 431 • C, with a sharp weight loss of 52.95% [24]. ...
The proper disposal of antibiotic mycelial residue (AMR) is a critical concern due to the spread of antibiotics and environmental pollution. Pyrolysis emerges as a promising technology for AMR treatment. In this study, we investigated the effect of pyrolysis temperature on the thermal decomposition behavior and product characteristics of avermectin (AV) mycelial residues. Various characterization techniques were employed to analyze thoroughly the compositions and yields of the obtained gas, liquid, and biochar products. The results indicated that most of the organic matter such as protein, carbohydrate, and aliphatic compounds in AV mycelial residues decomposed intensely at 322 °C and tended to end at 700 °C, with a total weight loss of up to 72.6 wt%. As the pyrolysis temperature increased, the biochar yield decreased from 32.81 wt% to 26.39 wt% because of the enhanced degradation of volatiles and secondary reactions of the formed aromatic rings. Accordingly, more gas components were formed with the gas yield increased from 9.76 wt% to 15.42 wt%. For bio-oil, the contents were maintained in the range of 57.43–60.13 wt%. CO and CO2 dominated the gas components with a high total content of almost 62.37–97.54 vol%. At the same time, abundant acids, esters (42.99–48.85%), and nitrogen-containing compounds (32.14–38.70%) such as nitriles, amides, and nitrogenous heterocyclic compounds were detected for the obtained bio-oil. As for the obtained biochars, particle accumulation and irregular pores were presented on their bulk surface, which was primarily composed of calcium oxalate (CaC2O4) and calcium carbonate (CaCO3). This work can provide theoretical insights for the harmless disposal and resource recovery for AMR, contributing significantly to the field of solid waste reuse and management.
