Adsorptive characterization of porous solids: Error analysis guides the way

Lange, Martijn F. de; Vlugt, Thijs J. H.; Gascón, Jorge; Kapteijn, Freek

doi:10.1016/j.micromeso.2014.08.048

Cited by 147 publications

(117 citation statements)

References 85 publications

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“…Thermogravimetric analysis (TGA) was performed on a Mettler Toledo TGA/SDTA1 with sample robot (TSO 801RO) and gas control (TSO 800GC1 54 Total pore volume was measured at P/P 0 = 0.95 where no inter-particle condensation occurred, the external surface area and microporous volume were determined by the t-method, obtaining a linear fit in the De Boer thickness of at least 10 data points. Elemental analysis was carried out with inductively coupled plasma optical emission spectroscopy (ICP-OES) instrumentation.…”

Section: Characterizationmentioning

confidence: 99%

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

et al. 2017

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The structure and elementary composition of various commercial Fe-based MOFs used as precursors for Fischer–Tropsch synthesis (FTS) catalysts have a large influence on the high-temperature FTS activity and selectivity of the resulting Fe on carbon composites. The selected Fe-MOF topologies (MIL-68, MIL-88A, MIL-100, MIL-101, MIL-127, and Fe-BTC) differ from each other in terms of porosity, surface area, Fe and heteroatom content, crystal density and thermal stability. They are re-engineered towards FTS catalysts by means of simple pyrolysis at 500 °C under a N2 atmosphere and afterwards characterized in terms of porosity, crystallite phase, bulk and surface Fe content, Fe nanoparticle size and oxidation state. We discovered that the Fe loading (36–46 wt%) and nanoparticle size (3.6–6.8 nm) of the obtained catalysts are directly related to the elementary composition and porosity of the initial MOFs. Furthermore, the carbonization leads to similar surface areas for the C matrix (SBET between 570 and 670 m2 g−1), whereas the pore width distribution is completely different for the various MOFs. The high catalytic performance (FTY in the range of 1.9–4.6 × 10−4 molCO gFe−1 s−1) of the resulting materials could be correlated to the Fe particle size and corresponding surface area, and only minor deactivation was found for the N-containing catalysts. Elemental analysis of the catalysts containing deliberately added promoters and inherent impurities from the commercial MOFs revealed the subtle interplay between Fe particle size and complex catalyst composition in order to obtain high activity and stability next to a low CH4 selectivity.

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Section: Characterizationmentioning

confidence: 99%

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

et al. 2017

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“…N 2 -adsorption isotherms were recorded at 77 K in a Micromeritics Gemini VII 2390t device (Micromeritics, Norcross, GA, USA). Typically, 0.2-0.5 g samples were adequately degassed at high vacuum under a continuous flux of pure N 2 for 24 h before the adsorption tests, as recommended by De Lange et al [61].…”

Section: Textural Properties Measurementmentioning

confidence: 99%

Catalytic Conversion of Model Tars over Carbon-Supported Ni and Fe

et al. 2018

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Tar removal from gasification gases is a determinant step to guarantee the operational feasibility of gasification-to-chemicals/energy systems. This study aimed to develop novel carbon-supported catalysts for the elimination of tarry aromatics (toluene, naphthalene and benzene) from gasification gases. Effects of reaction temperature (700 < T < 900 • C) and catalyst nature (Fe 0 and Ni 0 ) on the activity were assessed by considering thermo-catalytic conversion and steam reforming, under a simulated gasification gas. The catalysts (Ni and Fe) and support (AC) were characterized by X-ray diffraction (XRD), N 2 physisorption, thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and compositional analyses. Both catalysts and support, presented a mesoporous-like texture with a considerable high surface area (690 < S BET < 743 m 2 /g). Furthermore, dispersion of the metal nanoparticles (active phase) was uniform as confirmed by TEM images. Results from activity tests suggest that Ni/AC has higher effectivity for converting tars than Fe/AC, as confirmed by the low apparent activation energies (34 < E app < 98 kJ/mol) for naphthalene and benzene conversion between 700 and 900 • C. The conversion was 100% above 850 • C; nevertheless; below 750 • C, a sharp reduction in benzene conversion was observed, which was attributed to reversible carbon deposition.

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“…The adsorption characterization method used nitrogen gas at 77.2 K to measure the textural properties of the porous solids, namely, the specific surface area, pore volume, and pore size distribution (De Lange et al, 2014). The pore volume and specific surface area were determined using the Brunauer, Emmet, and Teller (BET) equation, and the pore size distribution was calculated according to the Barrett, Joyner, and Halenda (BJH) equation; both equations are based on the sorption isotherm.…”

Section: Modification Of Clinoptilolite Zeolitesmentioning

confidence: 99%

Biogas from Palm Oil Mill Effluent: Characterization and Removal of CO2 using Modified Clinoptilolite Zeolites in a Fixed-Bed Column

Kusrini¹,

Lukita

Gozan³

et al. 2016

IJTech

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The main focus of this article was to investigate the potential of natural zeolite adsorbent for the removal of CO 2 and H 2 S in biogas produced from palm oil mill effluent (POME) in fixed-bed column adsorption. The effects of the flowrates and dosage of the adsorbent on the CO 2 adsorption were also studied. The surface area of the adsorbent was determined using the Brunauer, Emmett, and Teller (BET) model, while the pore size distribution was calculated according to the Barrett, Joyner, and Halenda (BJH) model. The morphology of the adsorbent was determined by field emission scanning electron microscopy and energy dispersive x-ray (FESEM-EDX) analysis. Before and after purification, the biogas was analyzed by gas chromatography with a thermal conductivity detector and polydimethylsiloxane as a column. Biogas from the POME, via the anaerobic digestion process, produced 89% CH 4 and 11% CO 2 . The surface and structure of the clinoptilolite zeolites was modified by a strong acid (1M HCl), strong base (1M NaOH), and calcination at 450C, and the surface area of the natural zeolites was reduced up to 16%. The working capability of CO 2 adsorption by the modified zeolites decreased with increasing flow rates (100, 200, and 300 mL/min) of the biogas, with levels of CO 2 at 106,906, 112,237, and 115,256 mg/L. The removal of the CO 2 in the biogas by using adsorbent dosages of 1.5, 2.0, and 2.5 g was 97,878, 97,404 and 93,855 mg/L, respectively. The optimum purification of the biogas occurred under the flow rate of 100 mL/min and adsorbent dosage of 2.5 g. The high working capability of the modified zeolites for the removal of CO 2 in the biogas was a key factor, and the most important characteristic for the adsorbent. The results indicate that clinoptilolite zeolites are promising adsorbent materials for both the purification and upgrading of biogas.

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Adsorptive characterization of porous solids: Error analysis guides the way

Cited by 147 publications

References 85 publications

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

Catalytic Conversion of Model Tars over Carbon-Supported Ni and Fe

Biogas from Palm Oil Mill Effluent: Characterization and Removal of CO2 using Modified Clinoptilolite Zeolites in a Fixed-Bed Column

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