Microwave pyrolysis for valorisation of horse manure biowaste

Mong, Guo Ren; Chong, Cheng Tung; Ng, Jo-Han; Chong, William Woei Fong; Lam, Su Shiung; Ong, Hwai Chyuan; Ani, Farid Nasir

doi:10.1016/j.enconman.2020.113074

Cited by 65 publications

(13 citation statements)

References 52 publications

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“…Figure a exhibits that, after 800 s, pure cow manure could only be heated to 200 °C at a rate of 15.19 °C min –1 , displaying poor heating characteristics, which was same as the results reported by Mong et al With the addition of N-Fe/BC as a microwave adsorption–catalysis catalyst, the system exhibited good heating characteristics (dielectric capacity) and experienced similar heating processes. All of them experienced the stage of rapid heating from 25 °C to the target temperature and then fluctuated around the target temperature.…”

Section: Resultssupporting

confidence: 83%

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

et al. 2022

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To recover valuable products from biomass, bifunctional catalysts (N-Fe/BC) capable of microwave absorption and oriented production of phenolics were prepared by a one-pot method involving the microwave-induced K2FeO4. Its catalytic performances were evaluated, and the catalytic mechanism was explored using a model compound and DFT calculations. The cycle performance and deactivation mechanism were investigated. N-Fe/BC possessed a large S BET value (265.21 m2 g–1), good pore distribution, and abundant Fe and N species, resulting in good dielectric and catalytic properties. After catalysis, the heating rates reached 63.78–107.84 °C min–1, and the selectivity and yield of phenol-enriched bio-oil improved significantly, reaching maximum values of 80.28% and 38.09 wt % at 550 °C with 20 wt % N-Fe/BC, respectively. Model compound experiments and DFT calculations showed that N-Fe/BC directionally generated phenolics by changing the reaction path and forming “hot spots” that stimulated the catalytic reforming of oxygen-containing compounds. The catalytic performance decreased slightly after five cycles, due to active site loss, carbon deposition, and pore collapse.

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Section: Resultssupporting

confidence: 83%

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

et al. 2022

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“…This research has great worth in understanding the basic mechanisms of the microwave pyrolysis of biomass. In a recent study, Ren et al [202] converted horse manure to biochar by microwave pyrolysis. The quality of biochar was affected by temperature, catalyst loading, and carrier gas flow rate.…”

Section: Microwave Pyrolysis Of Biomassmentioning

confidence: 99%

Progress of the Pyrolyzer Reactors and Advanced Technologies for Biomass Pyrolysis Processing

et al. 2021

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In the future, renewable energy technologies will have a significant role in catering to energy security concerns and a safe environment. Among the various renewable energy sources available, biomass has high accessibility and is considered a carbon-neutral source. Pyrolysis technology is a thermo-chemical route for converting biomass to many useful products (biochar, bio-oil, and combustible pyrolysis gases). The composition and relative product yield depend on the pyrolysis technology adopted. The present review paper evaluates various types of biomass pyrolysis. Fast pyrolysis, slow pyrolysis, and advanced pyrolysis techniques concerning different pyrolyzer reactors have been reviewed from the literature and are presented to broaden the scope of its selection and application for future studies and research. Slow pyrolysis can deliver superior ecological welfare because it provides additional bio-char yield using auger and rotary kiln reactors. Fast pyrolysis can produce bio-oil, primarily via bubbling and circulating fluidized bed reactors. Advanced pyrolysis processes have good potential to provide high prosperity for specific applications. The success of pyrolysis depends strongly on the selection of a specific reactor as a pyrolyzer based on the desired product and feedstock specifications.

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“…Model-free methods such as the Flynn-Wall-Ozawa or Kissinger methods [ 126 ] can be deployed to describe the kinetics and complexity of the devolatilization process. Advanced thermochemical conversion methods such as microwave-induced pyrolysis can be deployed to pyrolyze lignocellulosic biomass, animal manure [ 127 ], scrap tyres [ 128 ] and other types of biowaste [ 129 ] to obtain value-added products. To investigate the relations between biofuel combustion and particulate emissions, Sitek et al.…”

Section: Novel Materials For Energy Storage and Conversionmentioning

confidence: 99%