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Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures
[Display omitted] ► Mixture catalysts of non-stoichiometric Pb hydroxyapatite were obtained. ► The catalysts were prepared by calcining Pb chloro-hydroxyapatites at 800°C. ► The OCM activity changed according to the Cl content of precursor apatite. ► Higher C2 selectivity was obtained at a catalyst...
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| Published in: | Fuel (Guildford) 2012-04, Vol.94, p.433-439 |
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| Main Authors: | , , , , , , |
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| container_title | Fuel (Guildford) |
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| creator | Park, Jai Hyun Lee, Dae-Won Im, Sung-Woo Lee, Yong Hee Suh, Dong-Jin Jun, Ki-Won Lee, Kwan-Young |
| description | [Display omitted]
► Mixture catalysts of non-stoichiometric Pb hydroxyapatite were obtained. ► The catalysts were prepared by calcining Pb chloro-hydroxyapatites at 800°C. ► The OCM activity changed according to the Cl content of precursor apatite. ► Higher C2 selectivity was obtained at a catalyst of higher surface basicity. ► The surface basicity was associated with the average coordination of lattice Pb2+.
Lead hydroxyapatite (PbxCa10−x(PO4)6(OH)2, 0 |
| doi_str_mv | 10.1016/j.fuel.2011.08.056 |
| format | article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1671341395</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0016236111005308</els_id><sourcerecordid>1671341395</sourcerecordid><originalsourceid>FETCH-LOGICAL-c429t-5dd1d7348c3c8669954457062fcc28fcaaac21d470ec5f718a88e0f19d4a1bee3</originalsourceid><addsrcrecordid>eNp9kEGLFDEQhYMoOK77Bzz1RfDSbarT6aTBiyzurrCwF70JIVupOBl6OmOSXmb-vRlm8eipoOp7r3iPsQ_AO-Awft51fqW56zlAx3XH5fiKbUAr0SqQ4jXb8Eq1vRjhLXuX845zrrQcNuzX4zE4W8IzNRjXwxyW3030zZ7K1i7UrPm8WOLS5hIDbkOslxSwmcm6ZntyKR5P9lANSjWwxc6nXJp9OJY1UX7P3ng7Z7p-mVfs5-23Hzf37cPj3febrw8tDv1UWukcOCUGjQL1OE6THAap-Nh7xF57tNZiD25QnFB6BdpqTdzD5AYLT0Tiin26-B5S_LNSLmYfMtI81whxzQZGBWIAMcmK9hcUU8w5kTeHFPY2nQxwc67S7My5SnOu0nBtapVV9PHF32a0s092wZD_KXs5CalAVe7LhaMa9jlQMhkDLUguJMJiXAz_e_MX_iqMUg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1671341395</pqid></control><display><type>article</type><title>Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures</title><source>ScienceDirect Journals</source><creator>Park, Jai Hyun ; Lee, Dae-Won ; Im, Sung-Woo ; Lee, Yong Hee ; Suh, Dong-Jin ; Jun, Ki-Won ; Lee, Kwan-Young</creator><creatorcontrib>Park, Jai Hyun ; Lee, Dae-Won ; Im, Sung-Woo ; Lee, Yong Hee ; Suh, Dong-Jin ; Jun, Ki-Won ; Lee, Kwan-Young</creatorcontrib><description>[Display omitted]
► Mixture catalysts of non-stoichiometric Pb hydroxyapatite were obtained. ► The catalysts were prepared by calcining Pb chloro-hydroxyapatites at 800°C. ► The OCM activity changed according to the Cl content of precursor apatite. ► Higher C2 selectivity was obtained at a catalyst of higher surface basicity. ► The surface basicity was associated with the average coordination of lattice Pb2+.
Lead hydroxyapatite (PbxCa10−x(PO4)6(OH)2, 0<x⩽10) is one of the most active catalysts for oxidative coupling of methane (OCM) to produce ethane and ethylene from natural gas (methane). In this study, we investigated how the OCM activity of a precipitated lead hydroxyapatite is associated with its mixture and non-stoichiometric properties. Lead hydroxyapatite was prepared through aqueous precipitation in the presence of chlorine anions and calcination under helium background at 1073K, which resulted in a mixture of non-stoichiometric lead hydroxyapatites, each having a different cationic composition (PbxCa10−x). The mixture could be diversified by extracting the chlorines thermally from the chloro-hydroxyapatites of various chlorine contents. The formation of an apatite structure was confirmed through Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF) and inductively coupled plasma (ICP) analyses. The non-stoichiometric characters of the prepared hydroxyapatites were analyzed through Raman/FT-Raman spectroscopy. The C2 selectivities of the prepared catalysts were evaluated at 1048K with a fixed CH4 conversion of 35%. Among the tested catalysts, lead hydroxyapatite, which was obtained by removing chlorines from Pb2Ca8(PO4)6(OH)0.5Cl1.5, showed a C2 selectivity of 62%, and achieved a C2 yield of 22% at 1048K. The OCM activity of the catalyst was mainly associated with its surface basicity, which was investigated using CO2-temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) analyses.</description><identifier>ISSN: 0016-2361</identifier><identifier>EISSN: 1873-7153</identifier><identifier>DOI: 10.1016/j.fuel.2011.08.056</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Applied sciences ; Catalysts ; Chlorine ; Energy ; Energy. Thermal use of fuels ; Ethylene ; Exact sciences and technology ; Fuels ; Hydroxyapatite ; Inductively coupled plasma ; Lead hydroxyapatite ; Methane ; Natural gas ; Oxidative coupling of methane ; Partial oxidation ; Selectivity ; Spectroscopy ; X-rays</subject><ispartof>Fuel (Guildford), 2012-04, Vol.94, p.433-439</ispartof><rights>2011 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c429t-5dd1d7348c3c8669954457062fcc28fcaaac21d470ec5f718a88e0f19d4a1bee3</citedby><cites>FETCH-LOGICAL-c429t-5dd1d7348c3c8669954457062fcc28fcaaac21d470ec5f718a88e0f19d4a1bee3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25935717$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Park, Jai Hyun</creatorcontrib><creatorcontrib>Lee, Dae-Won</creatorcontrib><creatorcontrib>Im, Sung-Woo</creatorcontrib><creatorcontrib>Lee, Yong Hee</creatorcontrib><creatorcontrib>Suh, Dong-Jin</creatorcontrib><creatorcontrib>Jun, Ki-Won</creatorcontrib><creatorcontrib>Lee, Kwan-Young</creatorcontrib><title>Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures</title><title>Fuel (Guildford)</title><description>[Display omitted]
► Mixture catalysts of non-stoichiometric Pb hydroxyapatite were obtained. ► The catalysts were prepared by calcining Pb chloro-hydroxyapatites at 800°C. ► The OCM activity changed according to the Cl content of precursor apatite. ► Higher C2 selectivity was obtained at a catalyst of higher surface basicity. ► The surface basicity was associated with the average coordination of lattice Pb2+.
Lead hydroxyapatite (PbxCa10−x(PO4)6(OH)2, 0<x⩽10) is one of the most active catalysts for oxidative coupling of methane (OCM) to produce ethane and ethylene from natural gas (methane). In this study, we investigated how the OCM activity of a precipitated lead hydroxyapatite is associated with its mixture and non-stoichiometric properties. Lead hydroxyapatite was prepared through aqueous precipitation in the presence of chlorine anions and calcination under helium background at 1073K, which resulted in a mixture of non-stoichiometric lead hydroxyapatites, each having a different cationic composition (PbxCa10−x). The mixture could be diversified by extracting the chlorines thermally from the chloro-hydroxyapatites of various chlorine contents. The formation of an apatite structure was confirmed through Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF) and inductively coupled plasma (ICP) analyses. The non-stoichiometric characters of the prepared hydroxyapatites were analyzed through Raman/FT-Raman spectroscopy. The C2 selectivities of the prepared catalysts were evaluated at 1048K with a fixed CH4 conversion of 35%. Among the tested catalysts, lead hydroxyapatite, which was obtained by removing chlorines from Pb2Ca8(PO4)6(OH)0.5Cl1.5, showed a C2 selectivity of 62%, and achieved a C2 yield of 22% at 1048K. The OCM activity of the catalyst was mainly associated with its surface basicity, which was investigated using CO2-temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) analyses.</description><subject>Applied sciences</subject><subject>Catalysts</subject><subject>Chlorine</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Ethylene</subject><subject>Exact sciences and technology</subject><subject>Fuels</subject><subject>Hydroxyapatite</subject><subject>Inductively coupled plasma</subject><subject>Lead hydroxyapatite</subject><subject>Methane</subject><subject>Natural gas</subject><subject>Oxidative coupling of methane</subject><subject>Partial oxidation</subject><subject>Selectivity</subject><subject>Spectroscopy</subject><subject>X-rays</subject><issn>0016-2361</issn><issn>1873-7153</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kEGLFDEQhYMoOK77Bzz1RfDSbarT6aTBiyzurrCwF70JIVupOBl6OmOSXmb-vRlm8eipoOp7r3iPsQ_AO-Awft51fqW56zlAx3XH5fiKbUAr0SqQ4jXb8Eq1vRjhLXuX845zrrQcNuzX4zE4W8IzNRjXwxyW3030zZ7K1i7UrPm8WOLS5hIDbkOslxSwmcm6ZntyKR5P9lANSjWwxc6nXJp9OJY1UX7P3ng7Z7p-mVfs5-23Hzf37cPj3febrw8tDv1UWukcOCUGjQL1OE6THAap-Nh7xF57tNZiD25QnFB6BdpqTdzD5AYLT0Tiin26-B5S_LNSLmYfMtI81whxzQZGBWIAMcmK9hcUU8w5kTeHFPY2nQxwc67S7My5SnOu0nBtapVV9PHF32a0s092wZD_KXs5CalAVe7LhaMa9jlQMhkDLUguJMJiXAz_e_MX_iqMUg</recordid><startdate>20120401</startdate><enddate>20120401</enddate><creator>Park, Jai Hyun</creator><creator>Lee, Dae-Won</creator><creator>Im, Sung-Woo</creator><creator>Lee, Yong Hee</creator><creator>Suh, Dong-Jin</creator><creator>Jun, Ki-Won</creator><creator>Lee, Kwan-Young</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20120401</creationdate><title>Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures</title><author>Park, Jai Hyun ; Lee, Dae-Won ; Im, Sung-Woo ; Lee, Yong Hee ; Suh, Dong-Jin ; Jun, Ki-Won ; Lee, Kwan-Young</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c429t-5dd1d7348c3c8669954457062fcc28fcaaac21d470ec5f718a88e0f19d4a1bee3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>Catalysts</topic><topic>Chlorine</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Ethylene</topic><topic>Exact sciences and technology</topic><topic>Fuels</topic><topic>Hydroxyapatite</topic><topic>Inductively coupled plasma</topic><topic>Lead hydroxyapatite</topic><topic>Methane</topic><topic>Natural gas</topic><topic>Oxidative coupling of methane</topic><topic>Partial oxidation</topic><topic>Selectivity</topic><topic>Spectroscopy</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Park, Jai Hyun</creatorcontrib><creatorcontrib>Lee, Dae-Won</creatorcontrib><creatorcontrib>Im, Sung-Woo</creatorcontrib><creatorcontrib>Lee, Yong Hee</creatorcontrib><creatorcontrib>Suh, Dong-Jin</creatorcontrib><creatorcontrib>Jun, Ki-Won</creatorcontrib><creatorcontrib>Lee, Kwan-Young</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Fuel (Guildford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Park, Jai Hyun</au><au>Lee, Dae-Won</au><au>Im, Sung-Woo</au><au>Lee, Yong Hee</au><au>Suh, Dong-Jin</au><au>Jun, Ki-Won</au><au>Lee, Kwan-Young</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures</atitle><jtitle>Fuel (Guildford)</jtitle><date>2012-04-01</date><risdate>2012</risdate><volume>94</volume><spage>433</spage><epage>439</epage><pages>433-439</pages><issn>0016-2361</issn><eissn>1873-7153</eissn><abstract>[Display omitted]
► Mixture catalysts of non-stoichiometric Pb hydroxyapatite were obtained. ► The catalysts were prepared by calcining Pb chloro-hydroxyapatites at 800°C. ► The OCM activity changed according to the Cl content of precursor apatite. ► Higher C2 selectivity was obtained at a catalyst of higher surface basicity. ► The surface basicity was associated with the average coordination of lattice Pb2+.
Lead hydroxyapatite (PbxCa10−x(PO4)6(OH)2, 0<x⩽10) is one of the most active catalysts for oxidative coupling of methane (OCM) to produce ethane and ethylene from natural gas (methane). In this study, we investigated how the OCM activity of a precipitated lead hydroxyapatite is associated with its mixture and non-stoichiometric properties. Lead hydroxyapatite was prepared through aqueous precipitation in the presence of chlorine anions and calcination under helium background at 1073K, which resulted in a mixture of non-stoichiometric lead hydroxyapatites, each having a different cationic composition (PbxCa10−x). The mixture could be diversified by extracting the chlorines thermally from the chloro-hydroxyapatites of various chlorine contents. The formation of an apatite structure was confirmed through Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF) and inductively coupled plasma (ICP) analyses. The non-stoichiometric characters of the prepared hydroxyapatites were analyzed through Raman/FT-Raman spectroscopy. The C2 selectivities of the prepared catalysts were evaluated at 1048K with a fixed CH4 conversion of 35%. Among the tested catalysts, lead hydroxyapatite, which was obtained by removing chlorines from Pb2Ca8(PO4)6(OH)0.5Cl1.5, showed a C2 selectivity of 62%, and achieved a C2 yield of 22% at 1048K. The OCM activity of the catalyst was mainly associated with its surface basicity, which was investigated using CO2-temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) analyses.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.fuel.2011.08.056</doi><tpages>7</tpages></addata></record> |
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| ispartof | Fuel (Guildford), 2012-04, Vol.94, p.433-439 |
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| language | eng |
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| source | ScienceDirect Journals |
| subjects | Applied sciences Catalysts Chlorine Energy Energy. Thermal use of fuels Ethylene Exact sciences and technology Fuels Hydroxyapatite Inductively coupled plasma Lead hydroxyapatite Methane Natural gas Oxidative coupling of methane Partial oxidation Selectivity Spectroscopy X-rays |
| title | Oxidative coupling of methane using non-stoichiometric lead hydroxyapatite catalyst mixtures |
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