Catalytic hydroconversion of Geting bituminous coal over FeNi–S/γ-Al2O3

Zhang, Dongdong; Zong, Zhi‐Min; Liu, Jing; Wang, Yinghua; Yu, Licheng; Lv, Jing-Hui; Wang, Tie-Min; Wei, Xian‐Yong; Wei, Zhehao; Li, Yan

doi:10.1016/j.fuproc.2015.01.045

Cited by 28 publications

(16 citation statements)

References 47 publications

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“…The coal mixed for the preparation of CoFe 2 O 4 @coal may have been liquefied, but the extra conversion for this catalyst in the liquefaction was deducted. Many studies [20,28,29] showed that active components supported by coal, which were usually obtained by impregnation, are good catalysts in DCL. Reusability is much more important in terms of the economical point of view.…”

Section: Catalytic Properties Of Samples In DCLmentioning

confidence: 99%

“…Specifically, the research of the interaction between iron and cobalt in coal hydrocracking for iron-based composite catalysts has not been reported. Moreover, the supported catalysts loaded with active components have also exhibited an enhanced catalytic property because they provide a high surface area and increased active sites [20,28,29]. However, supported iron-based catalysts are fabricated generally by an immersion method in liquid, which is time-consuming and tedious.…”

Section: Introductionmentioning

confidence: 99%

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Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Liu

et al. 2020

Catalysts

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Iron-based catalysts are promising catalysts in the direct coal liquefaction (DCL) process as they are inexpensive and environmentally friendly. However, most such iron-based catalysts show relatively low activity in coal conversion and oil yield. Common techniques for the synthesis of these catalysts with excellent catalytic performance remain a substantial challenge. We present a simple solid-state synthesis strategy for preparing CoFe2O4 nanoparticles and CoFe2O4 nanoparticles supported on coal (CoFe2O4@coal) composites for DCL. The obtained bimetallic oxide CoFe2O4 nanoparticles show an enhanced catalytic performance in the DCL compared with monometallic components Fe2O3 and Co(OH)2 nanoparticles. The synergistic effect between Co and Fe of CoFe2O4 nanoparticles promotes the catalytic hydrogenation of coal during the DCL process. Moreover, the catalytic performance of CoFe2O4 nanoparticles is further improved when they are loaded on the coal. The conversion, oil yield, liquefaction degree, and gas yield of Dahuangshan lignite are 99.44, 56.01, 82.18 and 19.30 wt %, respectively, with the CoFe2O4@coal composites involved. The smaller particle size and high dispersion of CoFe2O4 supported on coal are of great benefit to full contact between coal and active components. The in-situ solid-state synthesis with coal as support shows great potential to prepare effective iron-based catalysts toward DCL in practice.

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Section: Catalytic Properties Of Samples In DCLmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Liu

et al. 2020

Catalysts

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“…Compared to the traditional convension processes, catalytic hydroconversion (CHC) could be more feasible to produce chemicals from lignites [12–18] . In recent years, significant efforts have been devoted to directional degradation of coals and coal‐related model compounds (CRMCs) over heterogeneous catalysts because they meet the requirements of high‐performance and eco‐friendly features [19–24] .…”

Section: Introductionmentioning

confidence: 99%

Compositional Features of the Light Fraction from One/Two‐Step Effective Cascade Catalytic Hydroconversion of the Extraction Residue from Naomaohu Lignite

et al. 2022

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Naomaohu lignite (NL) was extracted with isometric acetone/carbon disulfide mixed solvent under ultrasonic irradiation. The extraction residue (ER) was subjected to non‐catalytic hydroconversion (NCHC) and one/two‐step cascade catalytic hydroconversion (CHC) in n‐hexane at 300 °C under 4 MPa of H2 over magnetic solid superacid (MSSA) and superbase (MSSB). The NCHC‐soluble portion from the NCHC (SPNCHC) and CHC‐soluble portion from the one/two‐step cascade CHC (SPA, SPB, SPA‐B, and SPB‐A) were analyzed with a gas chromatograph/ mass spectrometer (GC/MS). The results show that the yields of SPA and SPB are 18.65 % and 16.31 %, respectively, which are much higher than that of SPNCHC (1.26 %). According to the analysis with GC/MS, SPA and SPB are rich in phenol, dimethylnaphthalene, cresol, trimethylphenols, and xylenols, while alkanes are the predominant group component in the SPNCHC, indicating that MSSA selectively catalyzed the cleavage of Car−Calk and Calk−O bridged bonds, whereas MSSB tended to cleave Car−O and Calk−O bridged bonds connecting some aromatic rings in the ER. The yield of SPB‐A was as high as 11.07 % and SPA‐B was only 0.59 %. The results showed that more soluble species in the ER could be further released through the cascade CHC procedures. Benzyloxybenzene was used as a coal‐related model compound to probe the possible mechanisms of one/two‐step cascade CHC of the ER.

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“…A large number of studies have found that reducing the particle size of the catalyst and increasing its dispersion in the liquefaction system can promote the catalytic liquefaction of coal. 16 − 19 In particular, the supported catalyst is a high-performance catalyst that not only reduces the particle size of the active component but also improves its dispersion. 20 − 25 A variety of materials can be used as supports to prepare catalysts for DCL.…”

Section: Introductionmentioning

confidence: 99%

Fe₃O₄ Nanoparticles Supported on Modified Coal toward Catalytic Hydrogenation of Coal to Oil

Wang

Liu

et al. 2020

ACS Omega

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Iron-supported catalysts exhibit good catalytic performance in direct coal liquefaction (DCL), but the effect of the carrier on the performance of the composite catalyst is unclear. In this paper, a simple solid-state synthesis strategy for the preparation of coal-loaded Fe 3 O 4 nanoparticles (Fe 3 O 4 /Coal) and the hydrochloric acid treatment of coal-loaded Fe 3 O 4 nanoparticles (Fe 3 O 4 /Coal-HCl) is presented. The resulting composite was used as a catalyst for DCL. The effects of supports on the structure and performance of iron-supported catalysts have been illustrated. After the acid pretreatment of the catalyst carrier coal, the surface structure and functional groups changed, which affected the aggregation morphology of the Fe 3 O 4 active component. The Fe 3 O 4 /Coal-HCl catalyst improved the catalytic performance of DCL with conversion and oil yield of 98.02 and 49.96 wt %, respectively. The result shows that pretreatment can be an effective way to modify the surface of the catalyst carrier coals, thereby further improving the catalytic performance of composites. The iron-based composites prepared by the solid-state route show great potential as supported catalysts in DCL.

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Catalytic hydroconversion of Geting bituminous coal over FeNi–S/γ-Al2O3

Cited by 28 publications

References 47 publications

Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Compositional Features of the Light Fraction from One/Two‐Step Effective Cascade Catalytic Hydroconversion of the Extraction Residue from Naomaohu Lignite

Fe₃O₄ Nanoparticles Supported on Modified Coal toward Catalytic Hydrogenation of Coal to Oil

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Catalytic hydroconversion of Geting bituminous coal over FeNi–S/γ-Al2O3

Cited by 28 publications

References 47 publications

Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Room-Temperature Solid-State Preparation of CoFe2O4@Coal Composites and Their Catalytic Performance in Direct Coal Liquefaction

Compositional Features of the Light Fraction from One/Two‐Step Effective Cascade Catalytic Hydroconversion of the Extraction Residue from Naomaohu Lignite

Fe3O4 Nanoparticles Supported on Modified Coal toward Catalytic Hydrogenation of Coal to Oil

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Fe₃O₄ Nanoparticles Supported on Modified Coal toward Catalytic Hydrogenation of Coal to Oil