Abstract
In order to seek efficient resource utilization, the carbonization of agricultural and forestry wastes through microwave pyrolysis technology is an important research hotspot to develop value-added products. The main objective is to produce value-added biochar through microwave pyrolysis of peanut shell in this study. The product yields, functional groups, and biochar HHVs caused by pyrolysis temperature (400, 450, 500, 550, and 600 °C), microwave power (350, 450, 550, 650, and 750 W), and residence time (10, 20, 30, 40, and 50 min) were investigated, and the energy recovery efficiencies were evaluated. It was obtained that the biochar yield declined monotonously within the range of 45.3–86.0 wt% with the enhancement of pyrolysis temperature, microwave power, or residence time. The pyrolysis temperature of 400 °C, microwave power of 350 W, and residence time of 10 min generated the maximum biochar yield (86.0 wt%). The value-added biochar was obtained with high HHV (20.15–31.02 MJ/kg) and abundant oxygen-contained functional groups (C–O bonds and C=O bonds). The maximum energy recovery efficiency during the whole process reached 97.96%. The results indicated that the peanut shell could reach high biochar yield through microwave pyrolysis, and potentially be transformed into value-added products with high energy recovery efficiency.
Funding source: National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809
Award Identifier / Grant number: 52076049
Funding source: Scientific Research Starting Foundation for the Postdoctors at Heilongjiang Province http://dx.doi.org/10.13039/100016072
Award Identifier / Grant number: AUGA4120000518
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: Financial support was provided by the National Natural Science Foundation of China (52076049), and Scientific Research Starting Foundation for the Postdoctors at Heilongjiang Province (AUGA4120000518).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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- Frontmatter
- Articles
- Enhanced mechanical stirring by eccentric impeller stirring system in zinc hydrometallurgy process for cadmium removal
- DEM simulation of biomass pyrolysis in a novel interconnected screw reactor
- Numerical and experimental investigations on enhancement mixing performance of multi-blade stirring system for fluids with different viscosities
- The technical and economic analysis of processing and conversion of heavy oil cuts to valuable refinery products
- Effect of inlet gas velocity on gas-solid fluidization characteristics in fluidized bed
- Investigation into a multiple input/output bifurcated biochemical reaction with substrate inhibition in a real CSTR based on Cholette’s model
- Performance of photocatalytic oxidation surface with new geometry for indoor environment application: experimental and simulation
- Optimization of hydrothermal liquefaction process for bio-oil products from kitchen residue under subcritical conditions
- Value-added biochar production from microwave pyrolysis of peanut shell
- Short Communications
- Environmentally sustainable synthesis of cyclic carbonates from epoxides and CO2 promoted by MCM-41 supported dual imidazolium ionic liquids catalysts