Synthesis of zeolite-casted microporous carbons and their hydrogen storage capacity

Lee, Sang Soo; Park, Soo‐Jin

doi:10.1016/j.jcis.2012.06.058

Cited by 32 publications

(29 citation statements)

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“…34,48,51 Similar hysteresis loops in isotherms have also previously been observed for ordered porous carbons using other kinds of zeolites as the hard template. 29,30,33,36,47 On the other hand, the representative TEM images of the 10Xc-70 in Figures 3b and S2 (Supporting Information) further demonstrate that a part of the carbon precursors does have deposits on the external surface of the 10X zeolite template, and the carbons do have some randomly distributed mesopores, which are in excellent agreement with XRD and N 2 isotherms observations.From the pore structure parameters listed in Table 1, we can obviously find that the pore textures of carbons are largely dependent on the preparation conditions, namely, surface area and total pore volume of carbons derived from the liquid−gas two-step routes are much larger than ones from the single gas CVD process. As expected, carbons that exhibit well-developed zeolite-like orderings generally have a higher proportion of micropore surface area and pore volume.…”

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confidence: 79%

Large Surface Area Ordered Porous Carbons via Nanocasting Zeolite 10X and High Performance for Hydrogen Storage Application

Cai

et al. 2013

ACS Appl. Mater. Interfaces

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ABSTRACT:We report the preparation of ordered porous carbons for the first time via nanocasting zeolite 10X with an aim to evaluate their potential application for hydrogen storage. The synthesized carbons exhibit large Brunauer-Emmett-Teller surface areas in the 1300−3331 m 2 /g range and pore volumes up to 1.94 cm 3 /g with a pore size centered at 1.2 nm. The effects of different synthesis processes with pyrolysis temperature varied in the 600−800°C range on the surface areas, and pore structures of carbons were explored. During the carbonization process, carbons derived from the liquid−gas two-step routes at around 700°C are nongraphitic and retain the particle morphology of 10X zeolite, whereas the higher pyrolysis temperature results in some graphitic domains and hollow-shell morphologies. In contrast, carbons derived from the direct acetylene infiltration process have some incident nanoribbon or nanofiber morphologies. A considerable hydrogen storage capacity of 6.1 wt % at 77 K and 20 bar was attained for the carbon with the surface area up to 3331 m 2 /g, one of the top-ranked capacities ever observed for large surface area adsorbents, demonstrating their potential uses for compacting gaseous fuels of hydrogen. The hydrogen capacity is comparable to those of previously reported values on other kinds of carbon-based materials and highly dependent on the surface area and micropore volume of carbons related to the optimum pore size, therefore providing guidance for the further search of nanoporous materials for hydrogen storage. KEYWORDS: porous carbons, adsorption, nanocasting, zeolite template, hydrogen storage ■ INTRODUCTIONRecently, hydrogen as an alternative to fossil fuel has been recognized as an attractive energy carrier and fuel in the near future because it has high energy densities and creates neither air pollution nor greenhouse gas emissions.1−3 The main drawback for hydrogen as a transportation fuel is the lack of an effective storage method, which is yet to reach the criterions set by the DOE (Department of Energy, USA) for on-board application. Hence the development of cost-effective and feasible materials to satisfy on-board application claim for hydrogen storage is a great challenge. 4−7 Up to now, large numbers of adsorbents have been under intensive studies for hydrogen storage, and porous carbons with high surface areas and large pore volumes are considered as promising candidates for application as the hydrogen storage media. 8−12 The wide pore size distributions (PSDs) of conventional activated carbons in both the micro-and mesopore ranges will greatly affect their storage performance.13 Therefore, it is not difficult to imagine that preparation of carbons with a narrow PSD is very important in determining their adsorption performance. The template carbonization route is a versatile and well fitted methodology for the preparation of porous materials especially for the carbon-based materials with a controlled architecture and relative narrow PSD. 11,14−16 The template method usually...

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confidence: 79%

Large Surface Area Ordered Porous Carbons via Nanocasting Zeolite 10X and High Performance for Hydrogen Storage Application

Cai

et al. 2013

ACS Appl. Mater. Interfaces

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“…1c). A sharp peak at around 18 • in Cs-90 is the first time for observations and we speculatively believe that it maybe arise from other turbostaratic carbon contaminants [17,38]. In addition, the presence of USY zeolites in carbonization process can definitely inhibit the graphitization.…”

Section: Resultsmentioning

confidence: 83%

“…2). They are all the combination of Type I and II isotherms with an apparent hysteresis loop over a wide pressure range [39], and exhibit a more rounded "knee" at the low relative pressure than USY zeolites and Cs-90, indicating that the carbons contain not only large amounts of micropores but also a portion of meso-or macro-pores with slit-like pores, which are probably due to an incomplete infiltration of precursor into micro-channels of zeolites [14,17,30]. All of these observations are also supported from the pore volume analyses in Table 1.…”

Section: Resultsmentioning

confidence: 99%

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Large surface area sucrose-based carbons via template-assisted routes: Preparation, microstructure, and hydrogen adsorption properties

Cai

Yang

Xing

et al. 2014

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…[93][94][95][96][97][98]. Many synthetic methods for ordered porous carbon materials have been reported including (1) direct synthesis by organic-organic self-assembly, involving a combination of carbon precursors and block copolymers as soft templates, and (2) nanocasting using silica materials as structural directing hard templates [99][100][101][102].…”

Section: Ordered Porous Carbonsmentioning

confidence: 99%

A review: methane capture by nanoporous carbon materials for automobiles

Choi¹,

Jeong²,

Choi³

et al. 2016

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Global warming is considered one of the great challenges of the twenty-first century. In order to reduce the ever-increasing amount of methane (CH 4 ) released into the atmosphere, and thus its impact on global climate change, CH 4 storage technologies are attracting significant research interest. CH 4 storage processes are attracting technological interest, and methane is being applied as an alternative fuel for vehicles. CH 4 storage involves many technologies, among which, adsorption processes such as processes using porous adsorbents are regarded as an important green and economic technology. It is very important to develop highly efficient adsorbents to realize techno-economic systems for CH 4 adsorption and storage. In this review, we summarize the nanomaterials being used for CH 4 adsorption, which are divided into non-carbonaceous (e.g., zeolites, metal-organic frameworks, and porous polymers) and carbonaceous materials (e.g., activated carbons, ordered porous carbons, and activated carbon fibers), with a focus on recent research.

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Synthesis of zeolite-casted microporous carbons and their hydrogen storage capacity

Cited by 32 publications

References 50 publications

Large Surface Area Ordered Porous Carbons via Nanocasting Zeolite 10X and High Performance for Hydrogen Storage Application

Large Surface Area Ordered Porous Carbons via Nanocasting Zeolite 10X and High Performance for Hydrogen Storage Application

Large surface area sucrose-based carbons via template-assisted routes: Preparation, microstructure, and hydrogen adsorption properties

A review: methane capture by nanoporous carbon materials for automobiles

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