外磁场作用下Co/Al2O3纳米催化剂的催化行为

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-12-01 DOI:10.22036/PCR.2020.226018.1753

P. Nikparsa, Amirhosein Nikparsa, A. Mirzaei

{"title":"外磁场作用下Co/Al2O3纳米催化剂的催化行为","authors":"P. Nikparsa, Amirhosein Nikparsa, A. Mirzaei","doi":"10.22036/PCR.2020.226018.1753","DOIUrl":null,"url":null,"abstract":"Magnetic behavior of Co/Al2O3 catalyst in Fischer-Tropsch (FT) synthesis is performed using a magnetically fixed bed reactor. X-ray diffraction (XRD) spectroscopy, scanning electron microscope (SEM) method, Brunauer-Emmett-Teller (BET) method, and vibrating sample magnetometer (VSM) method are used to analyze the catalyst. Magnetic field of 0.015 T is suggested for CO hydrogenation on Co/Al2O3 catalyst with fixed bed reactor. Significant effects of magnetic fields are observed in the FT reaction of CO hydrogenation over Co/Al2O3 catalyst. The CO conversion value increases from 78% to 86% at 250 oC with external magnetic field. The apparent activation energy of FT reaction (102.33kJ/mol without external magnetic field) is reduced (96.45 kJ/mol with applying external magnetic field), and the catalytic activity of Co/Al2O3 catalyst is improved by applying the external magnetic fields during FT process at low temperatures (200-250 oC). The results indicated that the external magnetic fields improved both the rate of reaction and catalytic selectivity to desired hydrocarbons on Co/Al2O3 catalyst.","PeriodicalId":20084,"journal":{"name":"Physical Chemistry Research","volume":"8 1","pages":"645-656"},"PeriodicalIF":1.4000,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Catalytic Behavior of Co/Al2O3 Nanocatalyst under External Magnetic Field\",\"authors\":\"P. Nikparsa, Amirhosein Nikparsa, A. Mirzaei\",\"doi\":\"10.22036/PCR.2020.226018.1753\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Magnetic behavior of Co/Al2O3 catalyst in Fischer-Tropsch (FT) synthesis is performed using a magnetically fixed bed reactor. X-ray diffraction (XRD) spectroscopy, scanning electron microscope (SEM) method, Brunauer-Emmett-Teller (BET) method, and vibrating sample magnetometer (VSM) method are used to analyze the catalyst. Magnetic field of 0.015 T is suggested for CO hydrogenation on Co/Al2O3 catalyst with fixed bed reactor. Significant effects of magnetic fields are observed in the FT reaction of CO hydrogenation over Co/Al2O3 catalyst. The CO conversion value increases from 78% to 86% at 250 oC with external magnetic field. The apparent activation energy of FT reaction (102.33kJ/mol without external magnetic field) is reduced (96.45 kJ/mol with applying external magnetic field), and the catalytic activity of Co/Al2O3 catalyst is improved by applying the external magnetic fields during FT process at low temperatures (200-250 oC). The results indicated that the external magnetic fields improved both the rate of reaction and catalytic selectivity to desired hydrocarbons on Co/Al2O3 catalyst.\",\"PeriodicalId\":20084,\"journal\":{\"name\":\"Physical Chemistry Research\",\"volume\":\"8 1\",\"pages\":\"645-656\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2020-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physical Chemistry Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22036/PCR.2020.226018.1753\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Chemistry Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22036/PCR.2020.226018.1753","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

采用磁固定床反应器研究了Co/Al2O3催化剂在费托合成中的磁性行为。采用x射线衍射(XRD)光谱法、扫描电镜(SEM)法、brunauer - emmet - teller (BET)法和振动样品磁强计(VSM)法对催化剂进行了分析。在CO /Al2O3催化剂上采用固定床反应器进行CO加氢，建议磁场为0.015 T。磁场对CO /Al2O3催化剂上CO加氢FT反应有显著影响。外加磁场作用下，250℃时CO转化率由78%提高到86%。在低温(200 ~ 250℃)条件下，施加外磁场使FT反应的表观活化能(无外加磁场时为102.33kJ/mol)降低(外加磁场时为96.45 kJ/mol)，提高了Co/Al2O3催化剂的催化活性。结果表明，外加磁场提高了Co/Al2O3催化剂的反应速率和对所需烃类的选择性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Catalytic Behavior of Co/Al2O3 Nanocatalyst under External Magnetic Field

Magnetic behavior of Co/Al2O3 catalyst in Fischer-Tropsch (FT) synthesis is performed using a magnetically fixed bed reactor. X-ray diffraction (XRD) spectroscopy, scanning electron microscope (SEM) method, Brunauer-Emmett-Teller (BET) method, and vibrating sample magnetometer (VSM) method are used to analyze the catalyst. Magnetic field of 0.015 T is suggested for CO hydrogenation on Co/Al2O3 catalyst with fixed bed reactor. Significant effects of magnetic fields are observed in the FT reaction of CO hydrogenation over Co/Al2O3 catalyst. The CO conversion value increases from 78% to 86% at 250 oC with external magnetic field. The apparent activation energy of FT reaction (102.33kJ/mol without external magnetic field) is reduced (96.45 kJ/mol with applying external magnetic field), and the catalytic activity of Co/Al2O3 catalyst is improved by applying the external magnetic fields during FT process at low temperatures (200-250 oC). The results indicated that the external magnetic fields improved both the rate of reaction and catalytic selectivity to desired hydrocarbons on Co/Al2O3 catalyst.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.