Preface

Marsh, H.; Rodríguez-Reinoso, Francisco

doi:10.1016/b978-008044463-5/50013-3

Cited by 59 publications

(92 citation statements)

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“…Point of zero charge is the pH at which the external surface charge is zero [2]. 50 ml of 0.01N NaCl solution was placed in a closed Erlenmeyer flask.…”

Section: Determination Of Point Of Zero Charge (Pzc)mentioning

confidence: 99%

Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups

Nagalakshmi

Emmanuel²,

Babu

et al. 2015

ILCPA

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ABSTRACT. Jackfruit PPI-1 variety was selected as source of lignocellulose material. Its rind and pulp waste was used as precursor for preparation of activated carbon. K 2 CO 3 was selected as activating agent to prepare activated carbon. Various carbons were prepared by changing the impregnation ratio (IR) at different temperatures. Activated carbon prepared at 600 0 C and at IR1 had good BET surface area (987m 2 g -1 ) and yield (61.97%). In order to introduce different functional groups, this carbon was divided into two parts. One part was subjected to liquid phase oxidation with 0.1N HNO 3 and the other part was soaked in 0.1N KOH for 3hours. SEM, FTIR, TPD, XRD and TGA analyses were done to identify surface morphological changes, nature of functional groups and thermal stability of activated carbons.

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“…Point of zero charge is the pH at which the external surface charge is zero [2]. 50 ml of 0.01N NaCl solution was placed in a closed Erlenmeyer flask.…”

Section: Determination Of Point Of Zero Charge (Pzc)mentioning

confidence: 99%

Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups

Nagalakshmi

Emmanuel²,

Babu

et al. 2015

ILCPA

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“…Pyrocarbons are paracrystalline materials [18]. Therefore, pyrocarbon structure has to be described at a nanometer range (also called structure) and at long range (texture) [19].…”

Section: Rmsmentioning

confidence: 99%

Raman spectroscopy investigation of structural and textural change in C/C composites during braking

Bao-ling

et al. 2011

J. Cent. South Univ. Technol.

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The microstructure and texture of C/C composites with a resin-derived carbon, a rough laminar (RL) pyrocarbon and a smooth laminar pyrocarbon, before and after braking tests, were investigated by Raman spectroscopy. The full width at half maximum (FWHM) of the D-band indicates the amount of defects in the in-plane lattice, while the G-to-D band intensity (peak area) ratios (I G /I D ) is used to evaluate the degree of graphitization. The results show that the FWHM of D-band of sample with RL pyrocarbon changes greatly from 36 cm −1 to 168 cm −1 after braking tests, which indicates that a large number of lattice defects are produced on its wear surface. However, the graphitization degree of resin-derived carbon sample rises significantly, because the I G /I D increases from 0.427 to 0.928. Braking tests under normal loading conditions, involving high temperature and high pressure, produce a lot of lattice defects on the wear surface, and induce the graphitization of the surface. Sample with RL pyrocarbon having a low hardness is easy to deform, and has the most lattice defects on the wear surface after braking. While raw materials with resin-derived carbon have the lowest graphitization degree which rises greatly during braking.

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“…A chemical or physical activation procedure is then performed to enhance this porosity. Alternatively, both carbonisation and activation processes can be performed in one-step using a chemical agent [4,[14][15][16]. Physical activation of the char using CO 2 was chosen as the focus of this work, due to the lower environmental impact of the process in comparison to chemical activation [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Application of Experimental Design to Hydrogen Storage: Optimisation of Lignin-Derived Carbons

Rowlandson

O'Brien

Edler

et al. 2019

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Lignin is a significant by-product of the paper pulping and biofuel industries. Upgrading lignin to a high-value product is essential for the economic viability of biorefineries for bioethanol production and environmentally benign pulping processes. In this work, the feasibility of lignin-derived activated carbons for hydrogen storage was studied using a Design of Experiments methodology, for a time and cost-efficient exploration of the synthesis process. Four factors (carbonisation temperature, activation temperature, carbonisation time, and activation time) were investigated simultaneously. Development of a mathematical model allowed the factors with the greatest impact to be identified using regression analysis for three responses: surface area, average pore size, and hydrogen uptake at 77 K and 1 bar. Maximising the surface area required activation conditions using the highest settings, however, a low carbonisation temperature was also revealed to be integral to prevent detrimental and excessive pore widening. A small pore size, vital for efficient hydrogen uptake, could be achieved by using low carbonisation temperature but also low activation temperatures. An optimum was achieved using the lowest carbonisation conditions (350 °C for 30 min) to retain a smaller pore size, followed by activation under the severest conditions (1000 °C for 60 min) to maximise surface area and hydrogen uptake. These conditions yielded a material with a high surface area of 1400 m2 g−1 and hydrogen uptake of 1.9 wt.% at 77 K and 1 bar.

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Preface

Cited by 59 publications

References 0 publications

Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups

Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups

Raman spectroscopy investigation of structural and textural change in C/C composites during braking

Application of Experimental Design to Hydrogen Storage: Optimisation of Lignin-Derived Carbons

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