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Composition of Primary Coal Tar Fractions in Coke Production at Shubarkol Komir Shubarkol Komir焦炭生产中初级煤焦油馏分的组成
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X25601106
A. T. Ordabaeva, Z. M. Muldakhmetov, M. G. Meiramov, S. V. Kim, S. I. Suleimenov
{"title":"Composition of Primary Coal Tar Fractions in Coke Production at Shubarkol Komir","authors":"A. T. Ordabaeva,&nbsp;Z. M. Muldakhmetov,&nbsp;M. G. Meiramov,&nbsp;S. V. Kim,&nbsp;S. I. Suleimenov","doi":"10.3103/S1068364X25601106","DOIUrl":"10.3103/S1068364X25601106","url":null,"abstract":"<p>Attention focuses on the composition of the organic component in coal tar from Shubarkol Komir and its fractions boiling below 150°C and at 170–190 and 220–250°C. Out of the total number of phenols, gas–liquid chromatography identifies only 11 compounds in the coal tar (24.97% of the total tar mass). The presence of 26.15% paraffins (C<sub>10</sub>–C<sub>33</sub>) is also established. In the &lt;150°C fraction, the phenol content is 51.53%, and the content of paraffins (C<sub>10</sub>–C<sub>25</sub>) is 11.41%. The 170–190°C fraction contains 16.29% phenols and 15.40% paraffins (C<sub>10</sub>–C<sub>26</sub>). Finally, the 220–250°C fraction contains 1.47% phenols and 31.45% paraffins (C<sub>10</sub>–C<sub>29</sub>). These results confirm that such coal tar may be regarded as a practical source of valuable aromatic hydrocarbons.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"793 - 799"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical Composition of Ash in Ulug-Khem Coal 乌鲁格-康姆煤灰分化学成分研究
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X25601052
G. R. Mongush, N. N. Yanchat, Yu. F. Patrakov
{"title":"Chemical Composition of Ash in Ulug-Khem Coal","authors":"G. R. Mongush,&nbsp;N. N. Yanchat,&nbsp;Yu. F. Patrakov","doi":"10.3103/S1068364X25601052","DOIUrl":"10.3103/S1068364X25601052","url":null,"abstract":"<p>The chemical composition and properties of coal ash from the Kaa-Khem (GZh), Mezhegey (Zh), and Elegest (Zh) fields in the Ulug-Khem Basin are compared in order to develop recommendations for the use of such coal. Elemental analysis, Fourier transform infrared (FTIR) spectroscopy, and X-ray fluorescent spectroscopy are used to study the organic and mineral components of the coal and to determine the main ash components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, Fe<sub>2</sub>O<sub>3</sub>, CaO, etc.). In accordance with State Standard GOST 11022–95, the ash content of the coal is determined at 815 ± 10°C. The fusibility characteristics (softening point and melting point), the slag viscosity, and the slagging and fouling are calculated. It is found that the ash from the Kaa-Khem coal (39% SiO<sub>2</sub>, 14% Al<sub>2</sub>O<sub>3</sub>, 21% Fe<sub>2</sub>O<sub>3</sub>, and 12% CaO) is very thermostable (<i>t</i><sub>so</sub> = 1154.6°C). The ash from the Mezhegey coal (10% SiO<sub>2</sub>, 8% Al<sub>2</sub>O<sub>3</sub>, 36% Fe<sub>2</sub>O<sub>3</sub>, and 24% CaO) is of elevated basicity (<i>I</i><sub>b</sub> = 3.83), with a low melting point (1105.2°C). The ash from the Elegest coal (32% SiO<sub>2</sub>, 19% Al<sub>2</sub>O<sub>3</sub>, 23% Fe<sub>2</sub>O<sub>3</sub>, and 14% CaO) has a balanced composition, with moderate slag viscosity. Thus, the samples with high melting point (Kaa-Khem and Elegest coal) have little risk of slagging, whereas the Mezhegey coal requires additional measures to decrease the fouling (<i>R</i><sub><i>f</i></sub> = 3.28). The results confirm that Tuvinian coal is promising for practical use, if the specifics of the ash are taken into account.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"757 - 763"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Briquetting of Coal Batch by Stiff Extrusion 硬挤压成型煤块的研究
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X25601076
A. M. Bizhanov
{"title":"Briquetting of Coal Batch by Stiff Extrusion","authors":"A. M. Bizhanov","doi":"10.3103/S1068364X25601076","DOIUrl":"10.3103/S1068364X25601076","url":null,"abstract":"<p>The briquetting of coal batch by stiff extrusion for use in the coke industry is considered, in response to the ongoing deterioration and instability of the available coal resources. Research results confirm that this is an effective method of producing strong batch components for coking. The influence of the binder on the briquet properties—mechanical strength, thermal stability, and water resistance—is studied. The optimal fractional composition for briquetting is determined. A hybrid binder is found to ensure high thermal stability and water resistance of briquets consisting of coal and coke breeze.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"771 - 778"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Properties of Spent Catalyst from Veba Combi Cracking of Heavy Petroleum Residues: Results of Scanning Electron Microscopy and Energy-Dispersive X-ray Analysis 重质石油渣油裂化废催化剂的性质：扫描电镜和能量色散x射线分析结果
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X25601088
S. A. Sozinov, A. N. Prigorodova  (, ), N. S. Zakharov, N. A. Golumbevskaya, I. A. Korobetskii
{"title":"Properties of Spent Catalyst from Veba Combi Cracking of Heavy Petroleum Residues: Results of Scanning Electron Microscopy and Energy-Dispersive X-ray Analysis","authors":"S. A. Sozinov,&nbsp;A. N. Prigorodova \u0000 (,&nbsp;),&nbsp;N. S. Zakharov,&nbsp;N. A. Golumbevskaya,&nbsp;I. A. Korobetskii","doi":"10.3103/S1068364X25601088","DOIUrl":"10.3103/S1068364X25601088","url":null,"abstract":"<p>By scanning electron microscopy and energy-dispersive X-ray (EDX) analysis, spent catalyst (spent carbon additive) from Veba Combi Cracking of heavy petroleum residues is investigated. Analysis of the distribution of chemical elements shows that, in suspended cracking, V and Ni are deposited in macro- and mesopores and at the surface of coal particles as a result of breakdown of porphyrin complexes. The correlation between the V and N contents at concentration points suggests that disintegration of porphyrin complexes occurs first, with the formation of Ni particles, which then act as a catalyst in the decomposition of vanadyl porphyrins, which are more thermostable. The ultrafine Ni and V particles formed at the surface react with sulfur-bearing components (for example, hydrogen sulfide or sulfonic acids released in cracking), with the formation of sulfides and sulfates. Thus, the removal of metals from the cracking products is accompanied by their desulfurization on account of the formation of ultrafine Ni and V particles binding sulfur at the surface of the carbon additive. The Ca and Fe present in the carbon additive also participate in desulfurization of the cracking products and are converted to sulfides and sulfates.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"779 - 785"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gas Kinetic, Physical, Petrographic, and Sorptional Properties of Bituminous Zh Coal 烟煤的气体动力学、物理、岩石学和吸附性质
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X25601064
E. N. Kozyreva, M. S. Plaksin, R. I. Rodin
{"title":"Gas Kinetic, Physical, Petrographic, and Sorptional Properties of Bituminous Zh Coal","authors":"E. N. Kozyreva,&nbsp;M. S. Plaksin,&nbsp;R. I. Rodin","doi":"10.3103/S1068364X25601064","DOIUrl":"10.3103/S1068364X25601064","url":null,"abstract":"<p>The gas kinetic, physical, petrographic, and sorptional properties of coal are studied for the example of bituminous Zh coal. Special equipment is used for laboratory experiments on the saturation of coal samples by methane (sorption). By controlled gas releases (desorption) from samples of natural and artificially saturated coal, gas kinetic curves are plotted characterizing the gas depletion over time.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"764 - 770"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of the Sorption of Pollution Markers on the Physicochemical Properties of Sorbents 污染标记物的吸附对吸附剂理化性质的影响
IF 0.5
Coke and Chemistry Pub Date : 2025-12-24 DOI: 10.3103/S1068364X2560109X
I. V. Timoshchuk, A. K. Gorelkina, E. S. Mikhaylova, E. N. Neverov, L. A. Ivanova, S. A. Semenova
{"title":"Influence of the Sorption of Pollution Markers on the Physicochemical Properties of Sorbents","authors":"I. V. Timoshchuk,&nbsp;A. K. Gorelkina,&nbsp;E. S. Mikhaylova,&nbsp;E. N. Neverov,&nbsp;L. A. Ivanova,&nbsp;S. A. Semenova","doi":"10.3103/S1068364X2560109X","DOIUrl":"10.3103/S1068364X2560109X","url":null,"abstract":"<p>The collective influence of sorbed iron, manganese, sulfate, and nitrate ions—markers of water pollution from coal mines—on the physicochemical properties of the surface of AS and MS sorbents is studied by infrared (IR) spectroscopy, scanning electron microscopy, thermal analysis, and nitrogen porosimetry. The IR spectroscopic data for the relative content of oxygen groups at the sorbent surface after adsorption from the mixture correlate with the thermogravimetric results (thermal expansion coefficient, mass loss of the sample in different temperature ranges) and with nitrogen porosimetry. Changes in the proportions of Si–OH and Si–O bonds indicate restructuring of the hydrate groups and layer by layer sorption of marker ions. As a result, qualitative and quantitative changes in the proportions of pores are observed, as confirmed by porosimetry and the analysis of surface images from a scanning electron microscope.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 9","pages":"786 - 792"},"PeriodicalIF":0.5,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145808669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Automated Identification of Coal’s Maceral Groups from Microphotographs Using Computer Vision and Convolutional Neural Networks 利用计算机视觉和卷积神经网络从显微照片中自动识别煤的显微群
IF 0.5
Coke and Chemistry Pub Date : 2025-11-21 DOI: 10.3103/S1068364X25600939
M. V. Shishanov, N. N. Dobryakova, M. S. Luchkin, A. S. Evtiugin, I. S. Mezrin, A. Yu. Bozhko
{"title":"Automated Identification of Coal’s Maceral Groups from Microphotographs Using Computer Vision and Convolutional Neural Networks","authors":"M. V. Shishanov,&nbsp;N. N. Dobryakova,&nbsp;M. S. Luchkin,&nbsp;A. S. Evtiugin,&nbsp;I. S. Mezrin,&nbsp;A. Yu. Bozhko","doi":"10.3103/S1068364X25600939","DOIUrl":"10.3103/S1068364X25600939","url":null,"abstract":"<p>A method is developed for automated identification of groups of macerals (vitrinite, inertinite, liptinite, and semivitrinite) and mineral inclusions from digital microphotographs of polished coal briquet surfaces. It is based on convolutional neural networks (CNN) and computer vision. For a test sample, the accuracy attained is 92.31%; that is comparable with the results of manual assessment. This method greatly increases the speed of coal assessment and reduces the subjectivity. The algorithm only works for preexisting images. The current study doesn’t address the creation of new images: the equipment required, sample preparation, and the specifics of microphotography.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"705 - 712"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NMR Spectroscopic Analysis of Gas Coal 瓦斯煤的核磁共振光谱分析
IF 0.5
Coke and Chemistry Pub Date : 2025-11-21 DOI: 10.3103/S1068364X25600952
N. I. Fedorova, S. Yu. Lyrshchikov
{"title":"NMR Spectroscopic Analysis of Gas Coal","authors":"N. I. Fedorova,&nbsp;S. Yu. Lyrshchikov","doi":"10.3103/S1068364X25600952","DOIUrl":"10.3103/S1068364X25600952","url":null,"abstract":"<p>Six samples of G (gas) coal differing in yield of volatiles, atomic ratio H/C, and vitrinite reflection coefficient <i>R</i><sub>o,</sub> <sub>r</sub> (0.68–0.75%) are studied by <sup>13</sup>C NMR spectroscopic analysis. With increase in <i>R</i><sub>o,</sub> <sub>r</sub>, the aromatic content <i>f</i><sub>a</sub> of the organic mass in many samples increases from 0.65 to 0.71. This increase in <i>f</i><sub>a</sub> is proportional to the decrease in content of aliphatic carbon in structural fragments within the range 0–51 ppm. The plastic-layer thickness <i>y</i> is lowest for the sample with the highest <i>f</i><sub>a</sub> and lowest carbon content in aliphatic structural fragments of the coal’s organic mass.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"721 - 726"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Volatiles from Tuva Coal on Its Temperature Characteristics in Combustion: Thermogravimetric and IR Spectroscopic Analysis 图瓦煤挥发分对燃烧温度特性的影响：热重分析和红外光谱分析
IF 0.5
Coke and Chemistry Pub Date : 2025-11-21 DOI: 10.3103/S1068364X25600940
G. R. Mongush, Yu. F. Patrakov, A. V. Zhuikov
{"title":"Influence of Volatiles from Tuva Coal on Its Temperature Characteristics in Combustion: Thermogravimetric and IR Spectroscopic Analysis","authors":"G. R. Mongush,&nbsp;Yu. F. Patrakov,&nbsp;A. V. Zhuikov","doi":"10.3103/S1068364X25600940","DOIUrl":"10.3103/S1068364X25600940","url":null,"abstract":"<p>The influence of volatiles in Tuva coal (of ranks GZh and Zh) on its temperature characteristics in combustion is investigated by synchronous thermal analysis (thermogravimetric analysis and differential scanning calorimetry) and infrared (IR) spectroscopy. The yield of volatiles is greater for Kaa-Khem FZh coal (47.5%) than for Mezhegey Zh coal (36.4%), on account of differences in their coalification and elemental composition. Pyrolysis at 600–900°C leads to the formation of more thermostable carbon materials with a lower yield of volatiles (&lt;10%). Thermogravimetric analysis reveals inverse proportionality of the yield of volatiles and the ignition temperature. The reactivity is greatest for samples obtained at 600°C (ignition temperature up to 480–500°C), whereas carbonizates obtained at 900°C have high thermal stability (ignition temperature up to 640°C). IR spectroscopy confirms the destruction of oxygen-bearing and aliphatic groups on pyrolysis, with the formation of condensed aromatic structures. The results of this research may be applied to equipment used to generate thermal energy and also employed in switching to alternative fuels.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"713 - 720"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Creation of Electrode Materials for Supercapacitors by Thermal Decomposition of Transition Metal Nitrates in a Porous Carbon Matrix 多孔碳基体中过渡金属硝酸盐热分解制备超级电容器电极材料
IF 0.5
Coke and Chemistry Pub Date : 2025-11-21 DOI: 10.3103/S1068364X2560099X
T. A. Larichev, N. M. Fedorova, V. M. Pugachev, N. S. Zakharov, G. Yu. Simenyuk, R. P. Kolmykov, I. Yu. Zykov, R. S. Parshkov, T. S. Nechaeva
{"title":"Creation of Electrode Materials for Supercapacitors by Thermal Decomposition of Transition Metal Nitrates in a Porous Carbon Matrix","authors":"T. A. Larichev,&nbsp;N. M. Fedorova,&nbsp;V. M. Pugachev,&nbsp;N. S. Zakharov,&nbsp;G. Yu. Simenyuk,&nbsp;R. P. Kolmykov,&nbsp;I. Yu. Zykov,&nbsp;R. S. Parshkov,&nbsp;T. S. Nechaeva","doi":"10.3103/S1068364X2560099X","DOIUrl":"10.3103/S1068364X2560099X","url":null,"abstract":"<p>The formation of nanostructured composites by the thermal decomposition of transition metal nitrates in pores of a carbon matrix obtained in the carbonization of sapropelic coal is investigated. The nitrates—Co(NO<sub>3</sub>)<sub>2</sub>, Ni(NO<sub>3</sub>)<sub>2</sub>, Mn(NO<sub>3</sub>)<sub>2</sub>, Cu(NO<sub>3</sub>)<sub>2</sub>, Fe(NO<sub>3</sub>)<sub>3</sub>, Cr(NO<sub>3</sub>)<sub>3</sub>, and AgNO<sub>3</sub>—are introduced in the matrix by adsorption from 0.5 M aqueous solutions. Emission spectroscopy with inductively bound plasma shows that the concentration of the transition metals in the nanostructured composites is 2–6 wt %. It is established by X-ray spectral analysis that the thermal decomposition products of the transition metal nitrates in the pores of the matrix are X-ray amorphous, except for AgNO<sub>3</sub> and Cu(NO<sub>3</sub>)<sub>2</sub>, probably because the particles formed are small. Adsorption porosimetry indicates that the specific surface and pore volume of the carbon matrix are slightly reduced when introducing the filler by this means. According to derivatographic data, carbon matrices containing the precursor of the filler are less resistant to thermal oxidation in air, probably on account of catalysis by the transition metal oxide nanoparticles that form. The electrochemical properties of the resulting nanostructured composites for electrode production are investigated by cyclic voltammetry. The results show that, in some cases, the introduction of filler by the thermal decomposition of transition metal nitrates yields composites whose unit electrical capacitance exceeds that of the initial matrix. The growth in unit electrical capacitance is greatest (20–25%) for nanostructured composites filled with the decomposition products of magnesium (II) and copper (II) nitrates.</p>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"68 8","pages":"749 - 756"},"PeriodicalIF":0.5,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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