Article(id=1148106700088926477, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1148106697601704181, articleNumber=1003-3033(2025)01-0137-09, orderNo=null, doi=10.16265/j.cnki.issn1003-3033.2025.01.0485, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1723737600000, receivedDateStr=2024-08-16, revisedDate=1729526400000, revisedDateStr=2024-10-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1751659568092, onlineDateStr=2025-07-05, pubDate=1737993600000, pubDateStr=2025-01-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1751659568092, onlineIssueDateStr=2025-07-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1751659568092, creator=13701087609, updateTime=1751659568092, updator=13701087609, issue=Issue{id=1148106697601704181, tenantId=1146029695717560320, journalId=1146031787341344770, year='2025', volume='35', issue='1', pageStart='1', pageEnd='252', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1751659567499, creator=13701087609, updateTime=1757401533944, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172190250475573883, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1148106697601704181, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172190250475573884, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1148106697601704181, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=137, endPage=145, ext={EN=ArticleExt(id=1149757690299204202, articleId=1148106700088926477, tenantId=1146029695717560320, journalId=1146031787341344770, language=EN, title=Study on competitive adsorption of O
2/CH
4 mixed gas by coal from molecular perspective, columnId=1149733269173878863, journalTitle=China Safety Science Journal, columnName=Safety engineering technology, runingTitle=null, highlight=null, articleAbstract=
To deeply understand the competitive adsorption characteristics of O2/CH4 gas mixtures on the coal surface, the pore distribution and chemical structure of the coal surface were analyzed using the Grand Canonical Monte Carlo(GCMC) method. Molecular simulation was used to investigate adsorption capacity and heat variations during the competitive adsorption of O2/CH4 gas mixtures under varying concentrations, pressures, and temperatures. Moreover, the competitive adsorption mechanism of O2/CH4 gas mixtures on the coal surface was revealed by adsorption selectivity. The results indicated that the isothermal adsorption curves were identical when the concentration ratio of O2 to CH4 was 7/3. The integrated adsorption heat under different conditions was approximately 19.5-20.0 J/g for O2 and 24.0-24.8 J/g for CH4. When the concentration ratio of O2 to CH4 ranged between 7/3 and 2/8, the integrated adsorption heat of O2 was higher than that of CH4. The increased temperature decreased the adsorption capacity of both gases but increased the adsorption selectivity of O2 to CH4. Moreover, the effect of gas pressure on competitive adsorption weakened with pressure increase. CH4 adsorbed faster than O2 under low gas pressures, and CH4 reached saturation adsorption earlier than O2 when the total pressure increased. When the O2 concentration in the gas mixtures increased, the adsorption selectivity of O2 for CH4 decreased. However, CH4 consistently showed higher adsorption competitiveness than O2.
, correspAuthors=Chengyang PENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Shujing HE, Chengyang PENG, Jianhong KANG, Gengxian ZHANG), CN=ArticleExt(id=1148106706627846888, articleId=1148106700088926477, tenantId=1146029695717560320, journalId=1146031787341344770, language=CN, title=分子视角下煤对O
2/CH
4混合气体的竞争吸附研究, columnId=1149733269727526997, journalTitle=中国安全科学学报, columnName=安全工程技术, runingTitle=null, highlight=null, articleAbstract=
为深刻理解煤表面对O2/CH4混合气体的竞争吸附特性,基于巨正则蒙特卡罗法(GCMC)分析煤表面孔隙分布和化学结构;采用分子模拟研究不同浓度、不同压力、不同温度下O2/CH4混合气体竞争吸附过程中的吸附量和吸附热变化特征,并通过吸附选择性揭示O2/CH4混合气体在煤表面的竞争吸附机制。结果表明: O2与CH4浓度比为7/3时,二者的等温吸附曲线接近;不同条件下O2与CH4的积分吸附热相差不大,O2约19.5~20.0 J/g,CH4约24.0~24.8 J/g;当O2与CH4浓度比为7/3~2/8时,O2的积分吸附热大于CH4;随着温度升高,O2与CH4的吸附量均减少,且O2对CH4的吸附选择性增大,气体压力对竞争吸附的影响减弱;低气体压力条件下,CH4比O2吸附速率更快,当混合气体总压增加时,CH4比O2先达到饱和吸附;随着混合气体中O2浓度的增加,O2对CH4的吸附选择性呈现降低趋势,但CH4的吸附竞争力始终优先于O2。
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贺姝静 (1994—),女,湖南娄底人,博士研究生,主要研究方向为煤自燃防治理论。E-mail: shujinghe@cumt.edu.cn。
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贺姝静 (1994—),女,湖南娄底人,博士研究生,主要研究方向为煤自燃防治理论。E-mail: shujinghe@cumt.edu.cn。
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4混合气体), Keyword(id=1165721921002939302, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, orderNo=3, keyword=竞争吸附), Keyword(id=1165721921049076647, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, orderNo=4, keyword=吸附热), Keyword(id=1165721921086825384, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, orderNo=5, keyword=分子模拟)], refs=[Reference(id=1165721922932319172, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, doi=null, pmid=null, pmcid=null, year=2023, volume=25, issue=5, pageStart=103, pageEnd=110, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=袁亮, journalName=中国工程科学, refType=null, unstructuredReference=袁亮. 煤炭工业碳中和发展战略构想[J].
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FTIR spectra of molecular simulation and measurements, figureFileSmall=zfaRrmMUgJrIPEXeNs58og==, figureFileBig=bNCH0eMz67TjTQR1a2iZ/w==, tableContent=null), ArticleFig(id=1165721921376232364, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图2, caption=
分子模拟与试验结果的FTIR谱图, figureFileSmall=zfaRrmMUgJrIPEXeNs58og==, figureFileBig=bNCH0eMz67TjTQR1a2iZ/w==, tableContent=null), ArticleFig(id=1165721921439146925, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.3, caption=
Connelly surface of coal macromolecular model, figureFileSmall=nLgnQJMIQGd0XFUnHl+KIQ==, figureFileBig=coUXQF+3WfEhy3nE0ku/uA==, tableContent=null), ArticleFig(id=1165721921489478574, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图3, caption=
煤大分子模型的康纳利表面, figureFileSmall=nLgnQJMIQGd0XFUnHl+KIQ==, figureFileBig=coUXQF+3WfEhy3nE0ku/uA==, tableContent=null), ArticleFig(id=1165721921539810223, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.4, caption=
Pore size distribution of coal macromolecular model, figureFileSmall=xtJwHFZl4h2pB6W2IiI1gw==, figureFileBig=UmFtY3fUtiyPxGnKVJ0ycQ==, tableContent=null), ArticleFig(id=1165721921590141872, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图4, caption=
煤大分子模型孔径分布曲线, figureFileSmall=xtJwHFZl4h2pB6W2IiI1gw==, figureFileBig=UmFtY3fUtiyPxGnKVJ0ycQ==, tableContent=null), ArticleFig(id=1165721921632084913, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.5, caption=
Adsorption capacities and adsorption heat of O2/CH4 gas varied with gas pressure when φ0<1, figureFileSmall=LPIANhOxkExrZmwpW1KDMA==, figureFileBig=P3GoRI3CkJeqOG30qFA6rg==, tableContent=null), ArticleFig(id=1165721921720165298, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图5, caption=
当φ0<1时O2/CH4混合气体吸附量和吸附热随压力变化曲线, figureFileSmall=LPIANhOxkExrZmwpW1KDMA==, figureFileBig=P3GoRI3CkJeqOG30qFA6rg==, tableContent=null), ArticleFig(id=1165721921825022899, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.6, caption=
Adsorption capacities and adsorption heat of O2/CH4 gas mixtures varied with gas pressure when φ0>1, figureFileSmall=FS/2es2uK+T5b6fGBswoLg==, figureFileBig=y4IhQlvWdwePo2VIpAYEiw==, tableContent=null), ArticleFig(id=1165721921871160244, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图6, caption=
当φ0>1时O2/CH4混合气体吸附量和吸附热随压力变化曲线, figureFileSmall=FS/2es2uK+T5b6fGBswoLg==, figureFileBig=y4IhQlvWdwePo2VIpAYEiw==, tableContent=null), ArticleFig(id=1165721921925686197, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.7, caption=
Competitive adsorption capacities and adsorption heat of O2/CH4 gas mixtures varied with gas pressure at different temperatures, figureFileSmall=2rQxv2GWNfMPp/tMteL9HQ==, figureFileBig=DqJObZ/hyMBWgWVk2ydLow==, tableContent=null), ArticleFig(id=1165721921980212150, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图7, caption=
不同温度下O2/CH4混合气体竞争吸附量和积分吸附热随压力变化, figureFileSmall=2rQxv2GWNfMPp/tMteL9HQ==, figureFileBig=DqJObZ/hyMBWgWVk2ydLow==, tableContent=null), ArticleFig(id=1165721922034738103, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.8, caption=
Total adsorption capacity and adsorption heat for different gas mixture loadings, figureFileSmall=3b1mEsq+qAWJeZ9iYzAwDQ==, figureFileBig=eV+e6KsIJ/zRV29QC1Ilzw==, tableContent=null), ArticleFig(id=1165721922106041272, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图8, caption=
不同比例混合气体的总吸附量和吸附热曲线, figureFileSmall=3b1mEsq+qAWJeZ9iYzAwDQ==, figureFileBig=eV+e6KsIJ/zRV29QC1Ilzw==, tableContent=null), ArticleFig(id=1165721922156372921, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.9, caption=
Adsorption selectivity of O2/CH4 gas mixtures at different ratios, figureFileSmall=FL40SRgW9jiyUxIjZvpjkg==, figureFileBig=oJyJzp2rLGyqipqPpkJo0w==, tableContent=null), ArticleFig(id=1165721922219287482, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图9, caption=
不同比例下O2/CH4混合气体吸附选择性, figureFileSmall=FL40SRgW9jiyUxIjZvpjkg==, figureFileBig=oJyJzp2rLGyqipqPpkJo0w==, tableContent=null), ArticleFig(id=1165721922269619131, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Fig.10, caption=
Adsorption selectivity of O2/CH4 gas mixtures at different temperatures, figureFileSmall=SW0+9EhDIu7pzbDm2u0czA==, figureFileBig=lpVxpAial4GUKwPRGiBbJw==, tableContent=null), ArticleFig(id=1165721922324145084, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=图10, caption=
不同温度下O2/CH4混合气体吸附选择性, figureFileSmall=SW0+9EhDIu7pzbDm2u0czA==, figureFileBig=lpVxpAial4GUKwPRGiBbJw==, tableContent=null), ArticleFig(id=1165721922374476733, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=EN, label=Table 1, caption=
Fitting parameters of Langmuir model for competitive adsorption of O2/CH4 gas mixtures
, figureFileSmall=null, figureFileBig=null, tableContent=
| | p/MPa | / (mmol·g-1) | / (mmol·g-1) | / MPa | / MPa | / (J·g-1) | / (J·g-1) | R2 |
| 0.1 | 0~10 | 0.155 47 | 1.614 21 | 0.275 07 | 0.798 56 | 19.690 3 | 24.778 8 | 0.999 68 |
| 0.2 | 0~10 | 0.232 28 | 1.477 19 | 0.191 59 | 0.804 22 | 19.785 3 | 24.098 4 | 0.999 74 |
| 0.3 | 0~10 | 0.353 45 | 1.452 39 | 0.185 14 | 0.827 03 | 19.908 1 | 24.254 2 | 0.999 87 |
| 0.4 | 0~10 | 0.486 36 | 1.308 22 | 0.122 18 | 0.843 09 | 19.989 7 | 24.087 6 | 0.999 36 |
| 0.5 | 0~10 | 0.564 87 | 1.239 57 | 0.099 36 | 0.877 93 | 19.983 7 | 24.459 8 | 0.999 33 |
| 0.6 | 0~10 | 0.663 54 | 1.060 65 | 0.089 94 | 0.935 41 | 19.605 0 | 24.370 0 | 0.999 94 |
| 0.7 | 0~10 | 0.978 43 | 0.966 40 | 0.071 59 | 0.984 22 | 19.877 3 | 24.404 6 | 0.999 89 |
| 0.8 | 0~10 | 1.222 20 | 0.595 67 | 0.068 76 | 0.997 85 | 19.909 8 | 24.039 7 | 0.999 87 |
| 0.9 | 0~10 | 1.399 78 | 0.398 41 | 0.023 58 | 1.122 94 | 19.756 7 | 24.778 6 | 0.999 51 |
), ArticleFig(id=1165721922449974206, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1148106700088926477, language=CN, label=表1, caption=
O2/CH4混合气体竞争吸附的Langmuir模型拟合参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| | p/MPa | / (mmol·g-1) | / (mmol·g-1) | / MPa | / MPa | / (J·g-1) | / (J·g-1) | R2 |
| 0.1 | 0~10 | 0.155 47 | 1.614 21 | 0.275 07 | 0.798 56 | 19.690 3 | 24.778 8 | 0.999 68 |
| 0.2 | 0~10 | 0.232 28 | 1.477 19 | 0.191 59 | 0.804 22 | 19.785 3 | 24.098 4 | 0.999 74 |
| 0.3 | 0~10 | 0.353 45 | 1.452 39 | 0.185 14 | 0.827 03 | 19.908 1 | 24.254 2 | 0.999 87 |
| 0.4 | 0~10 | 0.486 36 | 1.308 22 | 0.122 18 | 0.843 09 | 19.989 7 | 24.087 6 | 0.999 36 |
| 0.5 | 0~10 | 0.564 87 | 1.239 57 | 0.099 36 | 0.877 93 | 19.983 7 | 24.459 8 | 0.999 33 |
| 0.6 | 0~10 | 0.663 54 | 1.060 65 | 0.089 94 | 0.935 41 | 19.605 0 | 24.370 0 | 0.999 94 |
| 0.7 | 0~10 | 0.978 43 | 0.966 40 | 0.071 59 | 0.984 22 | 19.877 3 | 24.404 6 | 0.999 89 |
| 0.8 | 0~10 | 1.222 20 | 0.595 67 | 0.068 76 | 0.997 85 | 19.909 8 | 24.039 7 | 0.999 87 |
| 0.9 | 0~10 | 1.399 78 | 0.398 41 | 0.023 58 | 1.122 94 | 19.756 7 | 24.778 6 | 0.999 51 |
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