Abstract
In India, agricultural wastes such as palm ash and rice husk, which are abundant which have a high potential for usage as usable renewable energy and silica. Silicon carbide (SiC) is utilized for various applications due to its high hardness, compressive strength, and good wear resistance. In this work, a cleaner and green methodology was adopted to produce SiC from various agricultural wastes like peanut shells, rice husks, sugar cane extracts, and corn cob. Pyrolysis experiments were carried out by varying parameters such as heating temperature (600 to 800 °C), heating time (160 to 180 min), and quantity of waste (450 to 550 g) to convert agricultural wastes into powder SiC. X-ray diffraction, Raman, Fourier transform infrared spectroscopy and Scanning electron microscope confirms the formation of SiC phase in SiC. The sintering process parameters such as heating rate (5 to 15°C/min), cooling rate (5 to 15 °C/min), and pressure (60 to 80 MPa) were selected for finding fracture toughness of sintered SiC. The process parameters for the pyrolysis and sintering process were optimized by the Taguchi optimization technique. Confirmations tests were conducted with optimum process parameters and the results indicated that confirmations results are correlated with predicted results.
Highlights
Chemical processing of feedstock from biomass would improve consumption and give economical value to farm waste
The laser-induced periodic surface structures (LIPSS) of a single Silicon carbide (SiC) crystal were analyzed by Binbin Meng et al The results indicated that surface adjustment using a second Femto laser reduces the pressing and extrusion of the substrate and enables substrate removal
X-ray diffraction of SiC shows main peaks at (111), (200), (220), (311) planes of the SiC phase. which shows the formation of SiC [25] (Fig. 3)
Summary
Chemical processing of feedstock from biomass would improve consumption and give economical value to farm waste. Microwave-assisted pyrolysis (MWAP) would need less input energy and processing time, so there is a greater thermo-chemical decomposition of the biomass feedstock [11]. Dai et al [12] developed soap content bio-oil and biochar through microwave-assisted fast catalytic pyrolysis process. The chemical and physical properties of biochar extracted from MWAP Biosolids were studied at pyrolysis temperatures from 300 to 800°C [13]. The input parameters (temperature, power of the microwave, and flow rate of N2) demonstrated a complete overview of the laboratory method for both H2 and biochar reactions to an application package. This approach decreases the number of tests considerably. Actual vs. expected graphs clearly illustrate that the actual H2 and yield values for the biochar are well balanced with the projected values
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