A highly active Ni/mesoporous attapulgite for hydrocracking CO bonds in rice straw

Li, Xiang; Zong, Zhi‐Min; Ma, Wei; Wei, Zhehao; Li, Yan; Cao, Jing‐Pei; Mayyas, Mohannad; Li, Zhan-Ku; Wei, Xian‐Yong

doi:10.1016/j.fuproc.2014.12.007

Cited by 27 publications

(7 citation statements)

References 27 publications

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“…The XRD patterns of different catalysts are shown in Figure . The diffraction spectra of all catalysts showed two typical peaks at 8.4 and 19.7°, which may be related to the configuration of the ATP structure . In addition, the peaks at 20.7° were considered as Si–O–Si crystalline layers and the strong peak at 26.6° belonged to quartz in ATP clay .…”

Section: Resultsmentioning

confidence: 92%

“…The diffraction spectra of all catalysts showed two typical peaks at 8.4 and 19.7°, which may be related to the configuration of the ATP structure. 42 In addition, the peaks at 20.7°were considered as Si−O−Si crystalline layers and the strong peak at 26.6°belonged to quartz in ATP clay. 43 Compared with raw ATP, octahedron cation and tetrahedron Si of A-ATP tend to be leached by stronger alkali (RM effluent), which resulted in the collapse of the crystal structure of ATP.…”

Section: Resultsmentioning

confidence: 99%

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Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal

Yang

et al. 2020

Energy Fuels

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In this article, the entire removal process was based on a cycle absorption system in which a primary-absorber was used to scrub SO 2 by urea, then residual NO and SO 2 could be oxidized by the vaporized H 2 O 2 /catalysts in the catalytic system, and finally, the soluble gaseous pollutants and the remaining gaseous oxidants were absorbed by ammonium sulfite that was produced from the primary-absorber. The complex catalysts formed by iron recovery from the bauxite residue (red mud) were restructured with adenosine triphosphate (ATP) to generate mesopores with surface-active sites (FeOH) for efficient H 2 O 2 catalysis. Further, 95.2% SO 2 and 88.6% NO were removed from flue gas under the operation conditions where SO 2 concentration was 2000 ppm, NO concentration was 500 ppm, O 2 concentration was 7%, CO 2 concentration was 10%, catalytic temperature was 140 °C, H 2 O 2 feeding rate was 1.5 mL/h, and the total gas flow rate was 1.5 L/min. The results suggested that the catalytic performance is closely related to the structure of support ATP, which was elucidated by a series of experiments in different Fe loadings and BET characterization. From electron spin resonance (ESR) results, H 2 O 2 generally decompose not only into the • OH free radical by iron oxide but also into • HOO and related reactive oxygen species. According to the results of X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR), the content of FeOH and lattice oxygen in the modified ATP catalyst played an important role in the adsorption of H 2 O 2 on the protonated surface of the low-acid catalyst. Furthermore, the rational catalytic mechanism of catalyst/H 2 O 2 at low and high temperatures (corresponding to 140 and 200 °C) was proposed by transient response experiments.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal

Yang

et al. 2020

Energy Fuels

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“…The typical peaks in the range of 846–866 eV are ascribed to Ni 2 p . The two peaks at 856.1 and 865.5 eV are attributed to higher hydroxylation of NiO, while the peak at 858.3 eV is assigned to the chemical bond of Ni, respectively …”

Section: Resultsmentioning

confidence: 99%

Directional Catalytic Hydroconversion of Oxybis (methylene)dibenzene and an Extract from Piliqing Subbituminous Coal over a Magnetic Difunctional Solid Superbase

Wei

Guang-hui

et al. 2020

ChemistrySelect

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An active and novel magnetic difunctional solid superbase catalyst Ni-Mg 2 Si/attapulgite powder (AP) was prepared by thermally decomposing nickel tetracarbonyl onto the assynthesized Mg 2 Si/AP followed by impregnating Mg 2 Si onto AP in CCl 4 and characterized by multiple analyses. It was also successfully used in the catalytic hydroconversion (CHC) of coal-related model compound oxybis (methylene) dibenzene (OBMDB) and an extract (E) from Piliqing subbituminous coal (PSBC) in n-hexane. As a result, OBMDB was completely converted to methylcyclohexane by the CHC under 3 MPa of initial hydrogen pressure at 240°C for 2 h. Ni-Mg 2 Si/AP can activate H 2 to biatomic active hydrogen (H … H) and split H 2 to immobile H + attached on the Ni-Mg 2 Si/AP surface and relatively mobile H À . Then the bridged linkage (BL) in OBMDB can be cleaved by H À attack on a α-carbon atom in OBMDB, producing toluene and benzyloxy anion, which abstracts H + from the Ni-Mg 2 Si/AP surface to afford phenylmethanol (PM). The α-carbon in PM is attacked by Hto generate toluene and HO À . H … H transfers to benzene ring in toluene yields methylcyclohexane. The soluble portion (SP) from the CHC (SP E-CHC ) and non-CHC (NCHC) (SP E-NCHC ) of E were analyzed with a gas chromatograph/mass spectrometer and Fourier transform infrared spectrometer. Non-substituted cycloalkanes (NSCAs) are predominant in the SP E-CHC , accounting for 66.9 % of the total group components, and interestingly 65.3 % of NSCAs is cyclohexane, while non-substituted arenes are the most abundant in the SP E-NCHC . The results indicate that the CHC is beneficial to the fracture of COCBB and hydrogenation of ARs to produce more NSCAs.[a] Dr.

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“…In addition to iron, other metals such as molybdenum, − nickel, ,− and cobalt , were also used to lignite hydroconversion. Among them, molybdenum-based catalysts have attracted much attention due to the effectiveness of well dispersed molybdenum at low concentrations and the function of removing heteroatoms. , Hulston et al reported that pretreatment with nickel acetate/ammonium molybdate is more effective than that with cobalt acetate/ammonium molybdate for hydroconversion of Loy Yang lignite at 400 °C.…”

Section: Catalytic Hydroconversion Of Lignites Under Mild Conditionsmentioning

confidence: 99%

Advances in Lignite Extraction and Conversion under Mild Conditions

Wei

Yan

et al. 2015

Energy Fuels

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Lignites are abundant coal resources, but they are low-quality fuel for direct combustion because of their high water content, high ash yield, and low calorific value. Upgrading technologies for lignites such as drying and pyrolysis have been widely investigated. Lignite conversion under mild conditions for producing ash-free coals, value-added chemicals, and/or liquid fuels also deserves attention. This paper reviews recent developments in extraction and mild conversion of lignites. The related techniques, including sequential extraction, thermal dissolution, mild oxidation, and catalytic hydroconversion of lignites, are summarized in detail. In addition, the application of high resolution mass spectrometry in determining lignite-derived products is presented. Future investigations on efficient utilization of lignites are also suggested.

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A highly active Ni/mesoporous attapulgite for hydrocracking CO bonds in rice straw

Cited by 27 publications

References 27 publications

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal

Directional Catalytic Hydroconversion of Oxybis (methylene)dibenzene and an Extract from Piliqing Subbituminous Coal over a Magnetic Difunctional Solid Superbase

Advances in Lignite Extraction and Conversion under Mild Conditions

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A highly active Ni/mesoporous attapulgite for hydrocracking CO bonds in rice straw

Cited by 27 publications

References 27 publications

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NOx and SO2 Removal

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NOx and SO2 Removal

Directional Catalytic Hydroconversion of Oxybis (methylene)dibenzene and an Extract from Piliqing Subbituminous Coal over a Magnetic Difunctional Solid Superbase

Advances in Lignite Extraction and Conversion under Mild Conditions

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Product

Resources

About

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal

Modified Fe-Rich Palygorskite as an Efficient and Low-Cost Heterogeneous Fenton Catalyst for NO_x and SO₂ Removal