A new solid acid for specifically cleaving the CarCalk bond in di(1-naphthyl)methane

Yue, Xiaoming; Wei, Xian‐Yong; Sun, Bing; Wang, Yinghua; Zong, Zhi‐Min; Fan, Xing; Liu, Ziwu

doi:10.1016/j.apcata.2012.03.002

Cited by 36 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The AHCs in the RPC (42.1 mg·g −1 , daf) are remarkably higher than those in the RPNC (9.7 mg·g −1 , daf). Our previous investigation showed that C ar -C alk bridge bond in di(1-naphthyl)methane can be especially ruptured over ASC to afford naphthalene and 1-methylnaphthalene under 5 MPa initial pressure of hydrogen at 300°C [18, 19]. H 2 was cleaved to H − adhering on the surface of the catalyst with H + moving freely over the ASC with strong acidity.…”

Section: Resultsmentioning

confidence: 99%

Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue

Yue

Zhang

et al. 2017

International Journal of Analytical Chemistry

View full text Add to dashboard Cite

Liquefaction residue of Heishan bituminous coal (HLR) was subject to two hydroconversion reactions under 5 MPa initial pressure of hydrogen at 300°C for 3 h, without catalyst and with acid supported catalyst (ASC), respectively. The reaction products were analyzed with gas chromatography/mass spectrometer (GC/MS). The results show that 222 organic compounds were detected totally in the products and they can be divided into alkanes, aromatic hydrocarbons (AHCs), phenols, ketones, ethers, and other species (OSs). The yield of hydroconversion over the ASC is much higher than that without catalyst. The most abundant products are aromatic hydrocarbons in the reaction products from both catalytic and noncatalytic reactions of HLR. The yield of aromatic hydrocarbons in the reaction product from hydroconversion with the ACS is considerably higher than that from hydroconversion without a catalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue

Yue

Zhang

et al. 2017

International Journal of Analytical Chemistry

View full text Add to dashboard Cite

show abstract

“…The weighted mean DBE values for compounds in O2 to O4 classes before catalytic treatment are between 12.8 and 14.9 (Table S2) but the value decreased to 10.3 (O1 class) after deoxygenation, indicating that some hydrogenation had taken place. The weighted mean carbon numbers before catalytic reactions range from 21.1 up to 23.3 for O2 to O4 classes (Table S3) but the number decreased to 17.4 (O1 class) after catalytic treatment, which suggests that some depolymerization of macromolecules, such as cleavage of alkyl chains in coal molecules, had occurred 21 .…”

Section: Resultsmentioning

confidence: 99%

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

Dong¹

2017

Preprint

View full text Add to dashboard Cite

Catalytic deoxygenation of coal enhances the stability and combustion performance of coal-derived liquids. However, determination of the selectivity of removal of oxygen atoms incorporated in or residing outside of aromatic rings is challenging. This limits the ability to evaluate the success of catalytic deoxygenation processes. A mass spectrometric method, in-source collision-activated dissociation (ISCAD), combined with high resolution product ion detection, is demonstrated to allow the determination of whether the oxygen atoms in aromatic compounds reside outside of aromatic rings or are part of the aromatic system, because alkyl chains can be removed from aromatic cores via ISCAD. Application of this method for the analysis of a subbituminous coal treated using a supported catalyst revealed that the catalytic treatment reduced the number of oxygen-containing heteroaromatic rings but not the number of oxygen atoms residing outside the aromatic rings.<br>

show abstract

“…Because of the high complexity of coal structures, studies on the reactions of coal-related model compounds have become powerful tools to reveal the mechanism of coal liquefaction on the molecular level. Previous investigations with coal-related model compounds indicate that metals catalyze biatomic hydrogen transfer, resulting in the hydrogenation of unsaturated moieties, especially aromatic rings, , while metal sulfides − and activated carbon − facilitate monatomic hydrogen transfer, i.e., radical hydrogen transfer, and solid acids promote proton transfer, leading to the cleavage of some covalent bonds, especially strong bridge bonds, e.g., Ar–X–Ar′ bonds (Ar and Ar′ denote aromatic rings and X denotes CH 2 , O, S, or NH).…”

Section: Catalytic Hydroconversion Of Lignites Under Mild Conditionsmentioning

confidence: 99%

“…Three solid acids were prepared by impregnating the same volume of pentachloroantimony, trimethylsilyl trifluoromethanesulfonate, or isometric pentachloroantimony and trimethylsilyl trifluoromethanesulfonate into an activated carbon. Di(1-naphthyl)methane was used as a coal-related model compound to evaluate their catalytic activity . The results exhibit that C ar –C alk bond in di(1-naphthyl)methane can be specifically cleaved over each catalyst to afford naphthalene and 1-methylnaphthalene under pressurized hydrogen at temperatures up to 300 °C, while as a new solid acid (NSA), pentachloroantimony-trimethylsilyl trifluoromethanesulfonate/activated carbon is obviously more active for di(1-naphthyl)methane hydrocracking than the other two solid acids.…”

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

A new solid acid for specifically cleaving the CarCalk bond in di(1-naphthyl)methane

Cited by 36 publications

References 29 publications

Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue

Chemical Compositional Analysis of Catalytic Hydroconversion Products of Heishan Coal Liquefaction Residue

Tandem Mass Spectrometric Evaluation of Core Structures of Aromatic Compounds after Catalytic Deoxygenation

Advances in Lignite Extraction and Conversion under Mild Conditions

Contact Info

Product

Resources

About