Article(id=1295068289202418603, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1295068190569164906, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202508039, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1755446400000, receivedDateStr=2025-08-18, revisedDate=1761667200000, revisedDateStr=2025-10-29, acceptedDate=1762272000000, acceptedDateStr=2025-11-05, onlineDate=1786697941350, onlineDateStr=2026-08-14, pubDate=1782316800000, pubDateStr=2026-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1786697941350, onlineIssueDateStr=2026-08-14, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1786697941350, creator=13701087609, updateTime=1786697941350, updator=13701087609, issue=Issue{id=1295068190569164906, tenantId=1146029695717560320, journalId=1210938733613449225, year='2026', volume='55', issue='6', pageStart='1', pageEnd='192', issueExtLink='null', onlineDate='null', pubDate='1782316800000', pubDateStr='2026-06-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1786697917835, creator='13701087609', updateTime=1786698816898, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1295071961596584952, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1295068190569164906, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1295071961596584953, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1295068190569164906, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=184, endPage=192, ext={EN=ArticleExt(id=1295068289407939500, articleId=1295068289202418603, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Study on the mechanism of alkali metal poisoning and deactivation of SCR denitrification catalysts based on configuration differences, columnId=1211002405299294959, journalTitle=Thermal Power Generation, columnName=Thermal energy science research, runingTitle=null, highlight=null, articleAbstract=
[Objective] With the popularization of co-combustion of high-alkali coal in Xinjiang, systematic studies on the difference and mechanism of alkali metal poisoning resistance between honeycomb and plate SCR catalysts remain insufficient. Most existing researches are based on the simulation of single alkali metal salts in the laboratory, whereas actual fly ash constitutes a complex mixture. The significant discrepancy between simulated conditions and real flue gas from high-alkali coal combustion results in limited engineering guidance value of relevant research findings.
[Methods] In this work, actual fly ash from power plants was adopted, and typical flue gas conditions were simulated in a laboratory fixed-bed reactor. The physical and chemical property changes of fresh and aged honeycomb and plate SCR catalysts were compared. Combined with specific surface area measurement, NH3-TPD analysis of surface acidity, XPS characterization of vanadium valence states and other techniques, the deactivation behaviors of the two catalysts upon alkali metal poisoning were systematically investigated.
[Results] Although plate catalysts are more susceptible to sintering deactivation under extreme high-alkali conditions, and bulk diffusion deactivation is difficult to recover via physical or mild chemical regeneration, their denitrification efficiency decays more slowly than that of honeycomb catalysts. At the same alkali loading, the denitrification activity of honeycomb catalysts decreased by 29.5% within 4 800 hours, while that of plate catalysts only dropped by 24.6%. The vanadium valence cycle of honeycomb catalysts is more easily interrupted by alkali metals, which suppresses the “fast SCR pathway” relying on NO→NO2 conversion. Moreover, their Brønsted acid sites are more prone to neutralization by alkali metals.
[Conclusion] Therefore, plate catalysts are the preferred choice for long-term denitrification in industrial scenarios involving co-combustion of high-alkali coal.
, authors=Yuhang YANG
1, Xiying TANG
2, Qiang BAO
1, Gongbin LI
2, Jian CAO
2, Lele WANG
1, Chuan HE
1, Jian LIU
1, Siyuan WANG
1, authorsList=Yuhang YANG, Xiying TANG, Qiang BAO, Gongbin LI, Jian CAO, Lele WANG, Chuan HE, Jian LIU, Siyuan WANG, authorCompany=null, correspAuthors=Lele WANG, 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, fund=null), CN=ArticleExt(id=1295068293006652351, articleId=1295068289202418603, tenantId=1146029695717560320, journalId=1210938733613449225, language=CN, title=基于构型差异的SCR脱硝催化剂碱金属中毒失活机制研究, columnId=1211002405437706993, journalTitle=热力发电, columnName=热能科学研究, runingTitle=null, highlight=null, articleAbstract=
【目的】 随着新疆高碱煤掺烧的普及,蜂窝式与板式催化剂的抗碱中毒性能差异及机制仍缺乏系统研究。现有工作多基于实验室单一碱金属盐模拟,而实际飞灰为复杂混合物,模拟条件与实际高碱煤烟气存在显著差异,导致研究成果工程指导价值有限。
【方法】 采用电厂实际飞灰,在实验室固定床反应器上模拟典型烟气工况,对比蜂窝式与板式SCR催化剂在新鲜及服役后的物理、化学性能变化。结合比表面积测定、NH3-TPD表面酸性分析、XPS钒价态表征等手段,系统研究两种催化剂的中毒失活行为。
【结果】 板式催化剂在极端高碱工况下虽更易烧结失活,体相扩散失活难以通过物理/温和化学再生恢复,但其脱硝效率衰减速率低于蜂窝式催化剂,在相同碱负荷下,蜂窝式催化剂的脱硝活性在4 800 h内下降达29.5%,而板式催化剂仅下降24.6%。蜂窝式催化剂的钒价态循环更易被碱金属阻断,抑制依赖于NO→NO2转化的“快速SCR路径”,且其布朗斯特酸性位点更易被碱金属中和。
【结论】 因此,在高碱煤掺烧的工业场景中板式催化剂是实现长效脱硝的优选方案。
, authors=杨宇航
1, 唐喜英
2, 鲍强
1, 李恭斌
2, 曹剑
2, 王乐乐
1, 何川
1, 刘健
1, 王思源
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杨宇航(1999),男,硕士,主要研究方向为脱硝催化剂性能优化、CO2矿化利用等技术,22127077@zju.edu.cn。
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杨宇航(1999),男,硕士,主要研究方向为脱硝催化剂性能优化、CO2矿化利用等技术,22127077@zju.edu.cn。
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15(5): 464-473., articleTitle=Study of semiconductor interface energy level structure by photoelectron spectroscopy, refAbstract=null)], funds=[Fund(id=1295068304134139930, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, awardId=HNKJ23-HF59, language=EN, fundingSource=Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ23-HF59), fundOrder=null, country=null), Fund(id=1295068304197054491, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, awardId=HNKJ23-HF59, language=CN, fundingSource=中国华能集团有限公司总部科技项目(HNKJ23-HF59), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1295068293375751104, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, xref=1., ext=[AuthorCompanyExt(id=1295068293384139713, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, companyId=1295068293375751104, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.华能甘肃能源开发有限公司范坪分公司,甘肃 兰州 730060)])], figs=[ArticleFig(id=1295068300006945789, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.1, caption=
Schematic diagram of the catalyst activity evaluation setup, figureFileSmall=IrdvkcX95kosqVXjX3cGOA==, figureFileBig=24SE+BTbpXui0aj0ziyTXg==, tableContent=null), ArticleFig(id=1295068300082443262, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图1, caption=
催化剂活性评价测试平台示意, figureFileSmall=IrdvkcX95kosqVXjX3cGOA==, figureFileBig=24SE+BTbpXui0aj0ziyTXg==, tableContent=null), ArticleFig(id=1295068302099903487, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.2, caption=
SEMs of the honeycomb and plate catalysts, figureFileSmall=nkiT92jW4F5f5BpNi6N3LA==, figureFileBig=QSSJkR2efoYI4GLC71CDjA==, tableContent=null), ArticleFig(id=1295068302175400960, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图2, caption=
蜂窝式与板式催化剂服役前后的扫描电镜图, figureFileSmall=nkiT92jW4F5f5BpNi6N3LA==, figureFileBig=QSSJkR2efoYI4GLC71CDjA==, tableContent=null), ArticleFig(id=1295068302250897408, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.3, caption=
XRD patterns of the catalysts before and after service, figureFileSmall=zQQ6VOtcfWJipomkmTPASA==, figureFileBig=rqaqQY37NORj1UagaJ4uIw==, tableContent=null), ArticleFig(id=1295068302318006273, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图3, caption=
催化剂服役前后的XRD, figureFileSmall=zQQ6VOtcfWJipomkmTPASA==, figureFileBig=rqaqQY37NORj1UagaJ4uIw==, tableContent=null), ArticleFig(id=1295068302385115138, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.4, caption=
Ti 2p peaks shown in XPS spectra of the catalysts before and after service, figureFileSmall=ppiaMoB5mi77ZgQ325UpPw==, figureFileBig=OeHagc3cNh+gmnsXk6zrmQ==, tableContent=null), ArticleFig(id=1295068302456418307, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图4, caption=
催化剂服役前后Ti 2p的XPS谱图, figureFileSmall=ppiaMoB5mi77ZgQ325UpPw==, figureFileBig=OeHagc3cNh+gmnsXk6zrmQ==, tableContent=null), ArticleFig(id=1295068302536110084, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.5, caption=
H2-TPR spectra of the catalysts before and after service, figureFileSmall=1ewHXa5XzqcXSsrJyMN6qw==, figureFileBig=4izjVyYhphbtfH03hd97Pw==, tableContent=null), ArticleFig(id=1295068302607413253, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图5, caption=
催化剂服役前后的H2-TPR谱图, figureFileSmall=1ewHXa5XzqcXSsrJyMN6qw==, figureFileBig=4izjVyYhphbtfH03hd97Pw==, tableContent=null), ArticleFig(id=1295068302695493638, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.6, caption=
NH3-TPD spectra of the catalysts before and after service, figureFileSmall=8jD83UJ3CCEeZL7iStVqIQ==, figureFileBig=81J5SQIgRI1XHdyE3u5f9Q==, tableContent=null), ArticleFig(id=1295068302758408199, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图6, caption=
催化剂服役前后的NH3-TPD谱图, figureFileSmall=8jD83UJ3CCEeZL7iStVqIQ==, figureFileBig=81J5SQIgRI1XHdyE3u5f9Q==, tableContent=null), ArticleFig(id=1295068302817128456, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.7, caption=
V 2p peaks shown in XPS spectra of the catalysts before and after service, figureFileSmall=O4rYcFmIBKvTcki4Bb9mqQ==, figureFileBig=Kxxxj8GcgKekhPIeBQbyIA==, tableContent=null), ArticleFig(id=1295068302880043017, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图7, caption=
催化剂服役前后的V 2p的XPS谱图, figureFileSmall=O4rYcFmIBKvTcki4Bb9mqQ==, figureFileBig=Kxxxj8GcgKekhPIeBQbyIA==, tableContent=null), ArticleFig(id=1295068302947151882, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.8, caption=
O 1s peaks shown in XPS spectra of the catalysts before and after service, figureFileSmall=YvmBXRaMpG4krwPV+t+GuA==, figureFileBig=JFNlg7qplVt500AhYm8iQA==, tableContent=null), ArticleFig(id=1295068303010066443, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图8, caption=
催化剂服役前后的O 1s的XPS谱图, figureFileSmall=YvmBXRaMpG4krwPV+t+GuA==, figureFileBig=JFNlg7qplVt500AhYm8iQA==, tableContent=null), ArticleFig(id=1295068303072981004, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Fig.9, caption=
W 4f and Mo 3d peaks shown in XPS spectra of the catalysts before and after service, figureFileSmall=I8b7cGGyJDzmcde9L30c8g==, figureFileBig=qzOWMnQmDjcD7txNmKDvbQ==, tableContent=null), ArticleFig(id=1295068303131701261, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=图9, caption=
催化剂服役前后的W 4f与Mo 3d的XPS谱图, figureFileSmall=I8b7cGGyJDzmcde9L30c8g==, figureFileBig=qzOWMnQmDjcD7txNmKDvbQ==, tableContent=null), ArticleFig(id=1295068303228170254, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Tab.1, caption=
Compositions of the fly ash from boiler combustion
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 燃料灰样 | 预除尘灰样 |
|---|
| w(SiO2)/% | 63.48 | 50.24 |
| w(Al2O3)/% | 6.75 | 30.22 |
| w(Fe2O3)/% | 2.79 | 4.23 |
| w(MgO)/% | 6.90 | 1.23 |
| w(CaO)/% | 3.32 | 7.07 |
| w(TiO2)/% | 0.39 | 1.03 |
| w(SO3)/% | 1.15 | 0.65 |
| w(P2O5)/% | 1.76 | 0.09 |
| w(K2O)/% | 9.22 | 2.95 |
| w(Na2O)/% | 0.99 | 1.65 |
), ArticleFig(id=1295068303303667727, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=表1, caption=
锅炉燃烧飞灰组分
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 燃料灰样 | 预除尘灰样 |
|---|
| w(SiO2)/% | 63.48 | 50.24 |
| w(Al2O3)/% | 6.75 | 30.22 |
| w(Fe2O3)/% | 2.79 | 4.23 |
| w(MgO)/% | 6.90 | 1.23 |
| w(CaO)/% | 3.32 | 7.07 |
| w(TiO2)/% | 0.39 | 1.03 |
| w(SO3)/% | 1.15 | 0.65 |
| w(P2O5)/% | 1.76 | 0.09 |
| w(K2O)/% | 9.22 | 2.95 |
| w(Na2O)/% | 0.99 | 1.65 |
), ArticleFig(id=1295068303370776592, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Tab.2, caption=
Parameters of the simulated flue gas
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| CO2质量分数 | 0.201 5 |
| SO2质量分数 | 0.000 4 |
| N2质量分数 | 0.650 6 |
| H2O质量分数 | 0.088 0 |
| O2质量分数 | 0.048 4 |
| 标准工况湿烟气密度/(kg·m–3) | 1.30 |
| 过量空气系数 | 1.32 |
), ArticleFig(id=1295068303437885457, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=表2, caption=
模拟烟气参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 数值 |
|---|
| CO2质量分数 | 0.201 5 |
| SO2质量分数 | 0.000 4 |
| N2质量分数 | 0.650 6 |
| H2O质量分数 | 0.088 0 |
| O2质量分数 | 0.048 4 |
| 标准工况湿烟气密度/(kg·m–3) | 1.30 |
| 过量空气系数 | 1.32 |
), ArticleFig(id=1295068303513382930, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Tab.3, caption=
Catalyst activity test results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 蜂窝 | 板式 |
|---|
| 新鲜 | 在役 | 新鲜 | 在役 |
|---|
| 面速度/(m3·(h·m–2)–1) | 29.6 | 34.0 | 55.6 | 55.7 |
| 氨氮摩尔比 | 1.01 | 1.01 | 1.01 | 1.01 |
| 入口NOx质量浓度/(mg·m–3) | 543 | 544 | 543 | 548 |
| 出口NOx质量浓度/(mg·m–3) | 148 | 244 | 245 | 301 |
| 活性/(m·h–1) | 38.6 | 27.2 | 44.3 | 33.4 |
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活性检测结果
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| 项目 | 蜂窝 | 板式 |
|---|
| 新鲜 | 在役 | 新鲜 | 在役 |
|---|
| 面速度/(m3·(h·m–2)–1) | 29.6 | 34.0 | 55.6 | 55.7 |
| 氨氮摩尔比 | 1.01 | 1.01 | 1.01 | 1.01 |
| 入口NOx质量浓度/(mg·m–3) | 543 | 544 | 543 | 548 |
| 出口NOx质量浓度/(mg·m–3) | 148 | 244 | 245 | 301 |
| 活性/(m·h–1) | 38.6 | 27.2 | 44.3 | 33.4 |
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Compositions of the catalysts before and after service
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| 项目 | 新鲜蜂窝 | 在役蜂窝 | 新鲜板式 | 在役板式 |
|---|
| TiO2 | 84.79 | 83.92 | 86.36 | 80.36 |
| WO3 | 4.86 | 4.24 | — | — |
| V2O5 | 0.89 | 0.80 | 1.61 | 1.16 |
| MoO3 | — | — | 3.85 | 3.29 |
| SO3 | 0.52 | 0.58 | 0.57 | 1.52 |
| SiO2 | 1.49 | 1.87 | 2.91 | 3.69 |
| Al2O3 | 0.25 | 0.31 | 0.84 | 1.08 |
| Fe2O3 | 0.06 | 0.04 | 0.54 | 1.76 |
| MgO | 0.10 | 0.16 | 0.18 | 1.09 |
| CaO | 0.85 | 0.81 | 0.88 | 0.87 |
| P2O5 | 0.15 | 0.18 | — | 0.08 |
| Nb2O5 | — | 0.04 | — | — |
| K2O | — | 0.74 | — | 0.83 |
| Na2O | — | 0.43 | — | 0.63 |
| As2O3 | — | — | — | — |
), ArticleFig(id=1295068303744069653, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=CN, label=表4, caption=
催化剂服役前后的成分
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| 项目 | 新鲜蜂窝 | 在役蜂窝 | 新鲜板式 | 在役板式 |
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| TiO2 | 84.79 | 83.92 | 86.36 | 80.36 |
| WO3 | 4.86 | 4.24 | — | — |
| V2O5 | 0.89 | 0.80 | 1.61 | 1.16 |
| MoO3 | — | — | 3.85 | 3.29 |
| SO3 | 0.52 | 0.58 | 0.57 | 1.52 |
| SiO2 | 1.49 | 1.87 | 2.91 | 3.69 |
| Al2O3 | 0.25 | 0.31 | 0.84 | 1.08 |
| Fe2O3 | 0.06 | 0.04 | 0.54 | 1.76 |
| MgO | 0.10 | 0.16 | 0.18 | 1.09 |
| CaO | 0.85 | 0.81 | 0.88 | 0.87 |
| P2O5 | 0.15 | 0.18 | — | 0.08 |
| Nb2O5 | — | 0.04 | — | — |
| K2O | — | 0.74 | — | 0.83 |
| Na2O | — | 0.43 | — | 0.63 |
| As2O3 | — | — | — | — |
), ArticleFig(id=1295068303815372822, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Tab.5, caption=
Specific surface areas of the catalysts before and after service
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| 项目 | 蜂窝 | 板式 |
|---|
| 新鲜 | 在役 | 新鲜 | 在役 |
|---|
| 微观比表面积/(m2·g–1) | 54.0 | 47.3 | 65.9 | 52.8 |
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催化剂服役前后比表面积
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 蜂窝 | 板式 |
|---|
| 新鲜 | 在役 | 新鲜 | 在役 |
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| 微观比表面积/(m2·g–1) | 54.0 | 47.3 | 65.9 | 52.8 |
), ArticleFig(id=1295068303974756376, tenantId=1146029695717560320, journalId=1210938733613449225, articleId=1295068289202418603, language=EN, label=Tab.6, caption=
Composition of the catalyst after regeneration
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| 项目 | 再生蜂窝基体 | 再生蜂窝表面 | 再生板式 |
|---|
| TiO2 | 85.33 | 84.88 | 86.86 |
| WO3 | 4.81 | 4.78 | — |
| V2O5 | 0.92 | 0.91 | 1.68 |
| MoO3 | — | — | 3.01 |
| SO3 | 0.42 | 0.40 | 0.29 |
| SiO2 | 1.57 | 1.63 | 2.52 |
| Al2O3 | 0.26 | 0.28 | 0.73 |
| Fe2O3 | 0.04 | 0.04 | 0.21 |
| MgO | 0.17 | 0.14 | 0.85 |
| CaO | 0.83 | 0.89 | 0.02 |
| P2O5 | 0.04 | 0.04 | — |
| Nb2O5 | — | — | — |
| K2O | — | — | 0.02 |
| Na2O | 0.42 | 0.40 | — |
| As2O3 | — | — | 0.29 |
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催化剂再生后的成分
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| 项目 | 再生蜂窝基体 | 再生蜂窝表面 | 再生板式 |
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| TiO2 | 85.33 | 84.88 | 86.86 |
| WO3 | 4.81 | 4.78 | — |
| V2O5 | 0.92 | 0.91 | 1.68 |
| MoO3 | — | — | 3.01 |
| SO3 | 0.42 | 0.40 | 0.29 |
| SiO2 | 1.57 | 1.63 | 2.52 |
| Al2O3 | 0.26 | 0.28 | 0.73 |
| Fe2O3 | 0.04 | 0.04 | 0.21 |
| MgO | 0.17 | 0.14 | 0.85 |
| CaO | 0.83 | 0.89 | 0.02 |
| P2O5 | 0.04 | 0.04 | — |
| Nb2O5 | — | — | — |
| K2O | — | — | 0.02 |
| Na2O | 0.42 | 0.40 | — |
| As2O3 | — | — | 0.29 |
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