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Your search keyword '"Rui-Peng Huo"' showing total 4 results
Start Over Author "Rui-Peng Huo" Topic biochar
4 results on '"Rui-Peng Huo"'

1. Study of the Effect of Adsorption Temperature on Elemental Mercury Removal Performance of Iron-Based Modified Biochar

Author

Rui-peng Huo, Rui Zhao, Xiaolei Qiao, Li Jia, Yu-xing Yao, and Bao-guo Fan

Subjects
Coprecipitation, Chemistry, General Chemical Engineering, Doping, Energy Engineering and Power Technology, Elemental mercury, 02 engineering and technology, 021001 nanoscience & nanotechnology, Fuel Technology, Adsorption, 020401 chemical engineering, Iron based, Biochar, 0204 chemical engineering, 0210 nano-technology, Nuclear chemistry
Abstract

An iron-based modified biochar was prepared by the coprecipitation method, including single iron-based modified biochar with FeCl3 and iron-based biochar doped with Cu and Mn from CuSO4 and KMnO4. ...

Published
2019

2. Study on the Elemental Mercury Adsorption Characteristics and Mechanism of Iron-Based Modified Biochar Materials

Author

Chuanwen Zhao, Fei Han, Rui-peng Huo, Bao-guo Fan, Yu-xing Yao, Li Jia, and Yan Jin

Subjects
Coprecipitation, General Chemical Engineering, Spinel, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, engineering.material, 021001 nanoscience & nanotechnology, 01 natural sciences, Mercury (element), Fuel Technology, Adsorption, chemistry, Chemical engineering, Desorption, Biochar, engineering, 0210 nano-technology, Pyrolysis, 0105 earth and related environmental sciences, Solid solution
Abstract

To provide a theoretical basis for the development of future mercury removal methods, two types of biochars modified by the coprecipitation method were investigated: undoped iron-based biochars modified with FeCl3 and iron-based biochars doped with Cu and Mn from CuSO4, Mn(CH3COO)2, and KMnO4. The crystal phase compositions, pyrolysis characteristics, pore structures, microscopic morphologies, elemental speciations, and functional groups of the modified biochars were characterized. The adsorption mechanism was further explored by temperature-programmed desorption (TPD). The results showed that the mercury adsorption of the modified biochars was significantly enhanced. The mercury adsorption performances first increased and then weakened with increased loading. The modification decreased the graphitization degree. Spinel structure solid solutions of MnFe2O4 and CuFe2O4 were formed in the modified biochars, generating many cation vacancies on the biochar surface. After biochar modification, the pore structu...

Published
2018

3. Study on the Effects of the Pyrolysis Atmosphere on the Elemental Mercury Adsorption Characteristics and Mechanism of Biomass Char

Author

Xiaolei Qiao, Yu-xing Yao, Yan Jin, Bao-guo Fan, Rui-peng Huo, Rui Zhao, Li Jia, and Ben Li

Subjects
Thermogravimetric analysis, Chemistry, 020209 energy, General Chemical Engineering, Energy Engineering and Power Technology, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Boudouard reaction, Fuel Technology, Adsorption, Chemical engineering, Desorption, Specific surface area, Biochar, 0202 electrical engineering, electronic engineering, information engineering, Char, Pyrolysis, 0105 earth and related environmental sciences
Abstract

Biochars prepared in three pyrolysis atmospheres of N2, O2, and CO2 were investigated. The pyrolysis characteristics, pore structures, and functional groups of the biochars were characterized by thermogravimetric analysis (TGA), specific surface area and porosity analyses, and Fourier transform infrared (FTIR) spectroscopy. The adsorption mechanism was further explored by the temperature-programmed desorption (TPD) technique in combination with the adsorption kinetics. The results showed that the Hg0 adsorption capacities of the biochars produced in an O2 pyrolysis atmosphere were worse than those of the biochars obtained in a N2 atmosphere, whereas CO2 significantly promoted the adsorption capacity. The biochar prepared in 20% CO2 had the highest adsorption capacity. Three pyrolysis reaction pathways were possible in the O2 atmosphere. In addition, a critical concentration existed between O2 concentrations of 5 and 7%. Above 750 °C, CO2 could react directly with the biochar through the Boudouard reaction...

Published
2018

4. Effects of Pyrolysis Mode and Particle Size on the Microscopic Characteristics and Mercury Adsorption Characteristics of Biomass Char.

Author

Li Jia, Bao-guo Fan, Ben Li, Yu-Xing Yao, Rui-Peng Huo, Rui Zhao, Xiao-Lei Qiao, and Yan Jin

Subjects
BIOCHAR, PYROLYSIS, ISOTHERMAL processes, MERCURY, TEMPERATURE
Abstract

Biomass chars (bio-chars) prepared under two pyrolysis modes and with four particle size ranges were investigated. The pyrolysis modes included isothermal pyrolysis and non-isothermal pyrolysis with three heating rates (5 °C/min, 10 °C/min, and 15 °C/min). The particle size ranges were 58- 75 μm, 75-106 μm, 106-150 μm, and 150-270 μm. The pyrolysis characteristics, pore structures, surface morphologies, and functional groups of the bio-chars were characterized by TGA, specific surface area and porosity analyses, SEM, and FTIR. The mercury adsorption was further explored by the adsorption kinetics. The results established the optimum pyrolysis conditions for mercury adsorption: pyrolysis temperature of 600 °C, heating rate of 10 °C/min, and particle size of 58- 75 μm. In addition, the mercury adsorption processes were affected by both physical adsorption and chemical adsorption. Furthermore, the rate constants of the pseudo-first-order and pseudo-second-order models gradually increased with decreasing particle size. [ABSTRACT FROM AUTHOR]

Published
2018
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