Characterization of Peanut Shells for Their Valorization in Earth Brick

Abstract

Peanut shells from Burkina Faso were characterized using mineralogical, microstructural and chemical methods to perform its possibility to be used as reinforce in adobe bricks. It consists of cellulose (48 wt%), hemicellulose (3 wt%) and lignin (28 wt%). The peanut shells were characterized by high porosity and showed water absorption around 198% at 72 hours. Its chemical composition is essentially composed of silica, iron oxides, alumina and calcium oxide. Its microstructure showed that the peanut shells were a compilation of microfibers with high porous of borders. In watery solution, the peanut shells released polyphenols. Thermal conductivity of peanut at 25˚C was 0.155 ± 0.021 W/mK. The physico-chemical characteristics of peanut shells were similar to those found with agricultural by-products used in adobe reinforce.

Effect of Eco-Friendly Peanut Shell Powder on the Chemical Resistance, Physical, Thermal, and Thermomechanical Properties of Unsaturated Polyester Resin Composites

“…The characteristic vibration bands in the FT-IR/ATR spectrum (Figure 2a) of the peanut shell powder are shown in Table 2. The assignment of the bands is consistent with those given in many articles dealing with lignocellulosic material [10,22,27,32].…”

“…This biofiller offers many functional groups, such as carboxyl, carbonyl, hydroxyl, and amino, in characteristic chemical structures.The characteristic vibration bands in the FT-IR/ATR spectrum (Figure2a) of the peanut shell powder are shown in Table2. The assignment of the bands is consistent with those given in many articles dealing with lignocellulosic material[10,22,27,32].TG and DTG thermal stability determinations were also made for the PSP (Figure2b). From the course of the TG and DTG curves.…”

“…The peanut shell is a lignocellulosic material composed of cellulose (44.8%), hemicellulose (5.6%), and lignin (36.1%) with a complex fibrous structure [21]. Of note is the large content of lignin in the fibers, much higher than in coconut, hemp, or sisal, which can be exploited for the improvement of composite reinforcing properties [22]. For example, Obasi [23] reported that the addition of peanut filler to polyethylene reduced the tensile strength and elongation at break, whereas compositions obtained with maleate polyethylene as a compatibilizer improved these properties.…”

Mechanical, Thermal and Hydric Behavior of the Bio-sourced Compressed Earth Block (B-CEB) Added to Peanut Shells Powder

“…The C-O stretching at 1165 and 1029 cm −1 were attributed to the aryl group in lignin [27][28][29]. The IR of used peanut shells seems to be similar to previous spectra obtained with peanut shells from another zone of Burkina Faso [30].…”

Biowaste Peanut Shell Powder-Based Triboelectric Nanogenerator for Biomechanical Energy Scavenging and Sustainably Powering Electronic Supplies

“…Furthermore, it is very important to study the purity of the PSP, as the peanut shells could vary a lot in terms of plant variety and food processing. The X-ray diffraction (XRD) analysis of the PSP (Figure c) results were matched with the previously reported literature, − that ensures the purity of the PSP. The amorphous phase in the XRD analysis shows the lignin and hemicellulose components in the PSP.…”