Preparation and Characterization of Carbon Microspheres From Waste Cotton Textiles By Hydrothermal Carbonization

2019 ◽  
Vol 7 (12) ◽  
pp. 1309-1319
Author(s):  
Yongfang Zhang ◽  
Wensheng Hou ◽  
Hong Guo ◽  
Sheng Shi ◽  
Jinming Dai
Keyword(s):  
Hydrothermal Carbonization ◽  
Carbon Microspheres ◽  
Cotton Textiles

Synthesis and characterization of carbon microspheres from rubber wood by hydrothermal carbonization

2018 ◽  
Vol 94 (5) ◽  
pp. 1374-1383 ◽  
Author(s):  
Tanveer Ahmed Khan ◽  
Hyun‐Joong Kim ◽  
Arun Gupta ◽  
Saidatul S Jamari ◽  
Rajan Jose
Keyword(s):  
Hydrothermal Carbonization ◽  
Synthesis And Characterization ◽  
Carbon Microspheres ◽  
Rubber Wood

Effect of L-Arginine on the Carbon Microsphere Forming under Hydrothermal Carbonization

2019 ◽  
Vol 41 (1) ◽  
pp. 72-72
Author(s):  
Jilei Liang Jilei Liang ◽  
Mengmeng Wu Mengmeng Wu ◽  
Hongmei Cai Hongmei Cai ◽  
Hao Wang Hao Wang ◽  
Hua Huang Hua Huang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Adsorption Capacity ◽  
Surface Property ◽  
Condensation Reaction ◽  
Hydrothermal Carbonization ◽  
Carbon Microspheres ◽  
N2 Adsorption ◽  
Sem Images ◽  
Ft Ir ◽  
Adsorption Desorption

Carbon microspheres (CMs) with a diameter of 5-10 μm have been synthesized by hydrothermal carbonization of starch and L-arginine. The surface property and structure of CMs were examined by FT-IR spectra, N2 adsorption-desorption isotherms and SEM images. These characterizations indicated that the L-arginine does not connect into the CMs but it promotes the starch hydrolysis and polymerization-condensation reaction of intermediate, which accelerates the formation of CMs and improves the yield in shorter time. The surface property of CMs determines adsorption capacity for acetic acid. By contrast, the porosity resulted from the carbonization at 500 and#176;C dominates the adsorption capacity for acetic acid.

Analysis and Characterization of Solid and Liquid Organic Fertilizer from Hydrothermal Carbonization (HTC) of Chicken Feather and Blood Waste

2021 ◽  
Vol 21 (3) ◽  
pp. 651
Author(s):  
Agus Kuncaka ◽  
Rizky Ibnufaatih Arvianto ◽  
Almas Shafira Ramadhanty Bunga Latifa ◽  
Munawir Ramadhan Rambe ◽  
Adhitasari Suratman ◽  
...  
Keyword(s):  
Iron Content ◽  
Solid Phase ◽  
Organic Fertilizer ◽  
Liquid Product ◽  
Hydrothermal Carbonization ◽  
Mass Ratio ◽  
Solid Product ◽  
Chicken Waste ◽  
20 Nm

Conversion of feather and blood from chicken slaughterhouse waste for producing solid and liquid organic fertilizer excluding composting process with a variation of the mass ratio of feather and blood of a chicken has been conducted. The nitrogen, sulfur, and iron content in the solid and liquid product of the hydrothermal carbonization process were analyzed to identify and characterize the possibility of hydrolysate as a source of nitrogen, sulfur, and iron in soil fertilizer. Feather and blood of chicken waste were introduced to a hydrothermal carbonization reactor with the addition of limestone at a temperature range of 160–170 °C for the preparation of solid and liquid organic fertilizer. According to the FTIR interpretation, the solid product had functional groups such as NH, OH, CH sp3, SH, C=O, C=C, C–O–C, and C–H aromatic. The nitrogen, sulfur, and iron content of the optimal ratio in the solid phase were 4.67%, 1.63%, and 3694.56 ppm, while their contents in the liquid fertilizer were 3.76%, 1.80%, and 221.56 ppm, respectively. The vibration of 478 cm–1 is attributed to Fe–O paramagnetic (Fe2O3) confirmed by TEM images showed the diameter size less than 20 nm indicating the presence of superparamagnetic material.

scholarly journals HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2058 ◽  
Author(s):  
Mateusz Jackowski ◽  
Lukasz Niedzwiecki ◽  
Magdalena Lech ◽  
Mateusz Wnukowski ◽  
Amit Arora ◽  
...  
Keyword(s):  
Main Product ◽  
Hydrothermal Carbonization ◽  
Fuel Properties ◽  
Mass Yield ◽  
Tracer Method ◽  
Brewing Process ◽  
Spent Grain ◽  
Potential Use ◽  
Comprehensive Characterization

Steady consumption of beer results in a steady output of residues, i.e., brewer’s spent grain (BSG). Its valorization, using hydrothermal carbonization (HTC) seems sensible. However, a significant knowledge gap regarding the variability of this residue and its influence on the valorization process and its potential use in biorefineries exists. This study attempted to fill this gap by characterization of BSG in conjunction with the main product (beer), taking into accounts details of the brewing process. Moreover, different methods to assess the performance of HTC were investigated. Overall, the differences in terms of the fuel properties of both types of spent grain were much less stark, in comparison to the differences between the respective beers. The use of HTC as a pretreatment of BSG for subsequent use as a biorefinery feedstock can be considered beneficial. HTC was helpful in uniformization and improvement of the fuel properties. A significant decrease in the oxygen content and O/C ratio and improved grindability was achieved. The Weber method proved to be feasible for HTC productivity assessment for commercial installations, giving satisfactory results for most of the cases, contrary to traditional ash tracer method, which resulted in significant overestimations of the mass yield.

scholarly journals Characterization of hydrochars produced by hydrothermal carbonization of rice husk

Solid Earth ◽  
2014 ◽  
Vol 5 (1) ◽  
pp. 477-483 ◽  
Author(s):  
D. Kalderis ◽  
M. S. Kotti ◽  
A. Méndez ◽  
G. Gascó
Keyword(s):  
Surface Area ◽  
Hydrothermal Carbonization ◽  
Aqueous Environment ◽  
Residence Times ◽  
Fixed Carbon ◽  
Heating Value ◽  
Carbon Recovery ◽  
Set Up ◽  
Technical Terms

Abstract. Biochar is the carbon-rich product obtained when biomass, such as wood, manure or leaves, is heated in a closed container with little or no available air. In more technical terms, biochar is produced by so-called thermal decomposition of organic material under limited supply of oxygen (O2), and at relatively low temperatures (< 700 °C). Hydrochar differentiates from biochar because it is produced in an aqueous environment, at lower temperatures and longer retention times. This work describes the production of hydrochar from rice husks using a simple, safe and environmentally friendly experimental set-up, previously used for degradation of various wastewaters. Hydrochars were obtained at 200 °C and 300 °C and at residence times ranging from 2 to 16 h. All samples were then characterized in terms of yield, surface area, pH, conductivity and elemental analysis, and two of them were selected for further testing with respect to heating values and heavy metal content. The surface area was low for all hydrochars, indicating that porous structure was not developed during treatment. The hydrochar obtained at 300 °C and 6 h residence times showed a predicted higher heating value of 17.8 MJ kg−1, a fixed carbon content of 46.5% and a fixed carbon recovery of 113%, indicating a promising behaviour as a fuel.

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