Effects of Ni Particle Size on Hydrogen Storage of Ni-Doped High Surface Area Activated Carbon

2013 ◽  
Vol 66 (5) ◽  
pp. 548 ◽  
Author(s):  
Lufeng Yang ◽  
Chunlin Xie ◽  
Chaofan Hu ◽  
Mingtao Zheng ◽  
Haibo Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Spillover Effect ◽  
Critical Factor ◽  
Ni Catalyst ◽  
Effective Role

A type of activated carbon that is further chemically activated to obtain a high surface area (~3322 m2 g–1) (hsAC), is loaded with nickel nanoparticles by a direct hydrothermal method, and tested for hydrogen storage. The chemical composition, crystal structure, and microstructure of hsAC with or without Ni loading are characterised in addition to the nitrogen absorbance isotherms. Hydrogen storage studies showed that metal doping has no effect on the cryogenic storage, and the maximum room temperature (RT) storage capacity through spillover on the Ni-doped hsAC materials achieved 0.79 wt-% at 30 Pa with enhancement factors of 2.93. The smaller catalyst size was a critical factor that determined the enhancement of RT storage capacity of the materials. The Ni catalyst size was controlled by the doped Ni content. Tuning the Ni catalyst size together with an optimum carbon spillover receptor should play an effective role in further enhancement by the spillover effect.

scholarly journals Correction: Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity

2021 ◽  
Author(s):  
L. Scott Blankenship
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogen Storage Capacity ◽  
Cigarette Butt ◽  
Energy Environ

Correction for ‘Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity’ by L. Scott Blankenship et al., Energy Environ. Sci., 2017, 10, 2552–2562, DOI: 10.1039/C7EE02616A.

Investigation of Polyaniline Nanocomposites and Cross-Linked Polyaniline for Hydrogen Storage

2012 ◽  
Vol 445 ◽  
pp. 571-576 ◽  
Author(s):  
Dervis E. Demirocak ◽  
Sarada Kuravi ◽  
Manoj K. Ram ◽  
Chand K. Jotshi ◽  
Sesha Srinivasan ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
Storage System ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogen Sorption ◽  
Commercial Application ◽  
Storage Mechanism ◽  
Hydrogen Storage System

One of the biggest challenges for the commercial application of existing hydrogen storage materials is to meet the desired high volumetric and gravimetric hydrogen storage capacity and the ability to refuel quickly and repetitively as a safe transportation system at moderate temperature and pressure. In this work, we have synthesized polyaniline nanocomposites (PANI-NC) and hypercrosslinked polyaniline (PANI-HYP) materials to provide structure and composition which could meet the specific demands of a practical hydrogen storage system. Hydrogen sorption measurements showed that high surface area porous structure enhanced the storage capacity significantly at 77.3K and 1atm (i.e., 0.8wt% for PANI-HYP). However at 298K, storage capacity of all samples is less than 0.5wt% at 70 bar. Hydrogen sorption results along with the surface area measurements confirmed that hydrogen storage mechanism predominantly based on physisorption for polyaniline.

scholarly journals Cigarette butt-derived carbons have ultra-high surface area and unprecedented hydrogen storage capacity

2017 ◽  
Vol 10 (12) ◽  
pp. 2552-2562 ◽  
Author(s):  
Troy Scott Blankenship ◽  
Robert Mokaya
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Storage Capacity ◽  
High Surface ◽  
High Surface Area ◽  
Hydrogen Storage Capacity ◽  
Cigarette Butt ◽  
Highly Porous

Cigarette butt derived carbons are highly porous (4310 m2 g−1 and 2.09 cm3 g−1) with record levels of hydrogen storage.

Carbon Dioxide Sequestration Using Activated Carbon From Agro Waste-Waste Bamboo

2021 ◽  
Author(s):  
Emmanuel Ayodele ◽  
Victoria Ezeagwula ◽  
Precious Igbokwubiri
Keyword(s):  
Activated Carbon ◽  
Fly Ash ◽  
Greenhouse Gases ◽  
Surface Area ◽  
Carbon Capture ◽  
Agricultural Waste ◽  
High Surface ◽  
Research Work ◽  
High Surface Area ◽  
Bet Surface Area

Abstract Bamboo trees are one of the fastest growing trees in tropical rainforests around the world, they have various uses ranging from construction to fly ash generation used in oil and gas cementing, to development of activated carbon which is one of the latest uses of bamboo trees. This paper focuses on development of activated carbon from bamboo trees for carbon capture and sequestration. The need for improved air quality becomes imperative as the SDG Goal 12 and SDG Goal13 implies. One of the major greenhouse gases is CO2 which accounts for over 80% of greenhouse gases in the environment. Eliminating the greenhouse gases without adding another pollutant to the environment is highly sought after in the 21st century. Bamboo trees are mostly seen as agricultural waste with the advent of scaffolding and other support systems being in the construction industry. Instead of burning bamboo trees or using them for cooking in the local communities which in turn generates CO2 and fly ash, an alternative was considered in this research work, which is the usage of bamboo trees to generate activated, moderately porous and high surface area carbon for extracting CO2 from various CO2 discharge sources atmosphere and for water purification. This paper focuses on the quality testing of activated carbon that can effectively absorb CO2. The porosity, pore volume, bulk volume, and BET surface area were measured. The porosity of the activated carbon is 27%, BET surface area as 1260m²/g. Fixed carbon was 11.7%, Volatility 73%, ash content 1.7%.

ChemInform Abstract: High-Surface-Area Oxides Obtained by an Activated Carbon Route.

ChemInform ◽  
2010 ◽  
Vol 33 (48) ◽  
pp. no-no
Author(s):  
Manfred Schwickardi ◽  
Thorsten Johann ◽  
Wolfgang Schmidt ◽  
Ferdi Schueth
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area

scholarly journals Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

2021 ◽  
Author(s):  
Ali H. Jawad ◽  
Ahmed Saud Abdulhameed ◽  
Noor Nazihah Bahrudin ◽  
Nurul Nadiah Mohd Firdaus Hum ◽  
S. N. Surip ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Type I ◽  
Order Kinetic ◽  
Bagasse Waste

Abstract In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

scholarly journals Preparation and characterization of activated carbons from albizia saman pod

2017 ◽  
Vol 36 (3) ◽  
pp. 44-53
Author(s):  
G. D. Akpen ◽  
M. I. Aho ◽  
N. Baba
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Activated Carbons ◽  
High Surface ◽  
High Surface Area ◽  
Volatile Matter ◽  
Sieve Analysis ◽  
Albizia Saman ◽  
Temperature Surface

Activated carbon was prepared from the pods of Albizia saman for the purpose of converting the waste to wealth. The pods were thoroughly washed with water to remove any dirt, air- dried and cut into sizes of 2-4 cm. The prepared pods were then carbonised in a muffle furnace at temperatures of 4000C, 5000C, 6000C ,7000C and 8000C for 30 minutes. The same procedure was repeated for 60, 90, 120 and 150 minutes respectively. Activation was done using impregnationratios of 1:12, 1:6, 1:4, 1:3, and 1:2 respectively of ZnCl2 to carbonised Albizia saman pods by weight. The activated carbon was then dried in an oven at 1050C before crushing for sieve analysis. The following properties of the produced Albizia saman pod activated carbon (ASPAC) were determined: bulk density, carbon yield, surface area and ash, volatile matter and moisture contents. The highest surface area of 1479.29 m2/g was obtained at the optimum impregnation ratio, carbonization time and temperature of 1:6, 60 minutes and 5000C respectively. It was recommended that activated carbon should be prepared from Albizia saman pod with high potential for adsorption of pollutants given the high surface area obtained.Keywords: Albizia saman pod, activated carbon, carbonization, temperature, surface area

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