Sugarcane Bagasse Carbon Research Articles

Hydrothermal synthesis of high specific capacitance electrode material using porous bagasse biomass carbon hosting MnO2 nanospheres

In this article, a high specific capacitance biomass carbon/MnO2 nanocomposites electrode materials were prepared by hydrothermal method. The porous sugarcane bagasse based biomass carbon was used as the host to load MnO2 nanospheres. The final obtained nanocomposites exhibit high specific capacitance. Besides, the effects of different electrolytes on the electrochemical properties of sugarcane bagasse carbon (SBC)/MnO2 nanosphere composites (SBC/MnO2) were also investigated. In comparison with MnO2 nanospheres, the specific capacitances of the SBC/MnO2 composite materials are improved whether in alkaline electrolyte or neutral electrolyte. Especially, in 1 M Na2SO4 electrolyte, the specific capacitance of SBC/MnO2 composite is up to 747 F·g−1 at a current density of 1 A·g−1, which is much higher than the MnO2 nanospheres at the same current density. At the same time, after 1000 cycles of charge–discharge process in a neutral electrolyte, the specific capacitance retention of SBC/MnO2 composite reaches 77%.

Hydrothermal Synthesis of Porous Sugarcane Bagasse Carbon/MnO2 Nanocomposite for Supercapacitor Application

In this article, we reported a biomass carbon/MnO2 nanocomposite electrode material prepared by a hydrothermal method. Sugarcane bagasse and KOH were the carbon source and activation agent, respectively. The obtained sugarcane bagasse carbon is rich in pore structure, so it can act as the host for MnO2. The biomass carbon/MnO2 nanocomposite electrode was prepared by a hydrothermal method. The morphologies of materials were observed by scanning electron microscopy. Raman spectra and x-ray diffraction were utilized to characterize the molecular and crystal structures of samples, respectively. The electrochemical and capacitive performances of materials were tested by electrochemical workstation. By calculation, the specific capacitance of sugarcane bagasse carbon, MnO2 and composite electrode are 280 F g−1, 163 F g−1 and 359 F g−1, respectively. Compared with pure sugarcane bagasse carbon and MnO2, the specific capacitance of the composite increases by 28% and 120%, respectively. After 2000 cycles of charge and discharge, the capacitance retention of the composite is 94%, which is higher than 91% of sugarcane bagasse carbon and 45% of MnO2.

Carbonization of Sugarcane Bagasse and Heat Transfer Property by Pyrolysis in Superheated Steam and Nitrogen Atmosphere

Carbonization of Sugarcane Bagasse and Heat Transfer Property by Pyrolysis in Superheated Steam and Nitrogen Atmosphere

Characterization and Production of Solid Biofuel from Sugarcane Bagasse by Hydrothermal Carbonization

Hydrothermal carbonization of sugarcane bagasse using hot-compressed-water was investigated for the treatment of solid material to understand the occurring decomposition reactions. The experiments were performed in 14 ml of batch type reactor in the range of temperatures 200–300 °C and reaction times 3–30 min. After separation of solid residues from liquid material, approximately 34–88 wt% of raw material was recovered as solid products. Characterizations show that increased treatment temperature and reaction time causes structural changes of the sugarcane bagasse. When the temperature and reaction time was increased, hemicellulose and cellulose gradually dissolved, leaving a lignin-like acid insoluble residue. The presence of the residue increases the fixed carbon and decreases the volatile matter content of the solid product. Dehydration significantly decreases the oxygen content and slightly decreases the hydrogen content of the treated material. With these changes, the caloric value and of the solid product increases by 1.1–1.9 times that of the raw material. Higher temperature treatment (300 °C) produces a material with high caloric value and fixed carbon, with a composition comparable to typical solid fuels such as lignite (or low rank-coal). The hydrothermal carbonization of sugarcane bagasse could be a solution to reduce environmental pollution caused by the combustion of wet stockpiled sugarcane bagasse in the sugar industry. The treated sugarcane bagasse reduces energy loss, smoke and water vapor during the combustion process.

Study of Structural and Electrical Conductivity of Sugarcane Bagasse-Carbon with Hydrothermal Carbonization

The important part of fuel cell is the gas diffusion layer who made from carbon based material porous and conductive. The main goal of this research is to obtain carbon material from sugarcane bagasse with hydrothermal carbonization and chemical-physics activation. There were two step methods in this research. The first step was sample preparation which consisted of prepare the materials, hydrothermal carbonization and chemical-physics activation. The second one was analyze character of carbon using EDS, SEM, XRD, and LCR meter. The amount of carbon in sugarcane bagasse-carbon was about 85%-91.47% with pore morphology that already form. The degree of crystallinity of sugarcane bagasse carbon was about 13.06%-20.89%, leaving the remain as the amorphous phase. Electrical conductivity was about 5.36 x 10-2 Sm-1 - 1.11 Sm-1. Sugarcane bagasse-carbon has porous characteristic with electrical conductivity property as semiconductor. Sugarcane bagasse-carbon with hydrothermal carbonization potentially can be used as based material for fuel cell if only time of hydrothermal carbonization hold is increased.

Preparation and electrochemical behaviour of biomass based porous carbons as electrodes for supercapacitors — a comparative investigation

We compared the relationship of the behavior and performance of sugarcane baggase and rice straw as supercapacitor electrodes. X-ray diffraction revealed the evolution of crystallites of carbon and silica during activation at higher temperature. The morphology of the carbon samples was determined by SEM. The surface area, pore volume, and pore size distribution of carbon composites were measured. The electrochemical responses were studied by using cyclic voltammetry experiment at 25 °C in a three-electrode configuration. The specific capacitance of the sugarcane bagasse carbon electrodes was in the range 92-340 F/g, whereas for rice straw, it was found to be 56–112 F/g at scan rates of 2-3 mV/s. The sugarcane bagasse carbon exhibited better performance than rice straw carbon using H2SO4 as the electrolyte. However, the results clearly show that lignocellulosic wastes possess a new biomass source of carbonaceous materials for high-performance supercapacitors.

Hydrothermal carbonization of sugarcane bagasse via wet torrefaction in association with microwave heating

Hydrothermal carbonization of sugarcane bagasse using wet torrefaction is studied. The biomass is torrefied in water or dilute sulfuric acid solution and microwaves are employed to heat the solutions where the reaction temperature is fixed at 180°C. The effects of acid concentration, heating time and solid-to-liquid ratio on the performance of wet torrefaction are investigated. It is found that the addition of sulfuric acid and increasing heating time are conducive to carbonizing bagasse. The calorific value of bagasse can be increased up to 20.3% from wet torrefaction. With the same improvement in calorific value, the temperature of wet torrefaction is lower than that of dry torrefaction around 100°C, revealing that wet torrefaction is a promising method to upgrade biomass as fuel. The calorific value of torrefied biomass can be predicted well based on proximate, elemental or fiber analysis, and the last one gives the best estimation.