Oxidation of Shengli lignite with aqueous sodium hypochlorite promoted by pretreatment with aqueous hydrogen peroxide

Preparation of high-dispersion Ni/C catalyst using modified lignite as carbon precursor for catalytic reforming of biomass volatiles

“…The oxidation of lignite may play an important role in improving of SSA and microporosity and the amount of ion exchange in catalyst preparation. Potassium permanganate, peroxyacetic acid, sodium hypochlorite, oxygen and hydrogen peroxide were used for increasing OCSs content [14][15][16][17][18][19][20], especially for environmentally friendly oxidant of hydrogen peroxide [21,22]. The ion exchange capacity of the lignite can be enhanced by oxidation treatment to provide the carboxyl group.…”

Identification of basic nitrogen compounds in ethanol-soluble portion from Zhaotong lignite ethanolysis by positive-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

“…Obtaining detailed information on ONCs is difficult due to their low content in coals. Gas chromatography/ mass spectrometry (GC/MS) has been successfully applied in identification of some soluble species from coals [12][13][14][15][16][17][18][19], but detecting less volatile and/or thermally labile species is difficult using this technology. In addition, GC/MS analysis is easily affected by complex matrix and there are only limited standard libraries for the identification of detected species.…”

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

“…Mild oxidation has proved to be an effective approach for providing insights into the macromolecular network structures of coals and producing value‐added chemicals, such as alkanoic acids (AAs), alkanedioic acids (ADAs), and BPCAs (Miura et al, ; Murata et al, ; Huang et al, ; Yao et al, ; Liu et al, ,, ; Lv et al, ). The molecular structures of these carboxylic acids can be determined by GC/MS after esterification with different methods (Murata et al, ; Yao et al, ; Pan et al, ; Lv et al, ; Liu et al, ).…”

“…The molecular structures of these carboxylic acids can be determined by GC/MS after esterification with different methods (Murata et al, ; Yao et al, ; Pan et al, ; Lv et al, ; Liu et al, ). Coal mild oxidation mainly includes ruthenium ion‐catalyzed oxidation (RICO) (Stock & Wang, , ; Murata et al, , ; Artok et al, ; Kidena et al, ; Huang et al, ; Yao et al, ; Liu et al, ; Wang et al, , ; Lv et al, ), oxidation in H 2 O 2 aqueous solution (Miura et al, ; Mae, Shindo, & Miura, ; Liu et al, , ; Pan et al, ; Doskočil et al, ; Tahmasebi et al, ), and oxidation in NaOCl aqueous solution (Yao et al, ; Liu et al, ,; Wang et al, ), according to different oxidants.…”

“…Extracts from low‐temperature extraction or thermal dissolution of coals are promising sources of value‐added chemicals (Liu et al, ; Cong et al, ,c) and high‐performance carbon materials (Ashida et al, ). Coal oxidation products abound in valuable carboxylic acids, such as short‐chain fatty acids (Miura et al, ; Liu et al, ) and benzene polycarboxylic acids (BPCAs) (Liu et al, ; Wang et al, ).…”