Preparation of reduced Ni-Nb-O composite hydrogenation catalysts for highly selective conversion of free fatty acids to n-alkanes
[Display omitted] Catalytic deoxygenation of fatty acids to alkanes is an ideal route to produce biodiesel with high heating value. However, traditional transition-metal sulfide and noble metal catalysts are sulfide-contaminated, high cost, or easily poisoned. To overcome the above issues, this work...
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Catalytic deoxygenation of fatty acids to alkanes is an ideal route to produce biodiesel with high heating value. However, traditional transition-metal sulfide and noble metal catalysts are sulfide-contaminated, high cost, or easily poisoned. To overcome the above issues, this work developed a non-noble and sulfide-free reduced transition-metal composite NixNbyOz, which was effective to selectively hydrogenate stearic acid, a typical fatty acid model compound, to diesel-range alkanes. By using a simple slurry method, reduced NixNbyOz catalysts have been successfully prepared with an outstanding catalytic performance. The results showed that catalyst Ni0.5Nb0.5Oz effectively converted stearic acid to n-alkanes with nearly 100% conversion and >99% n-alkanes selectivity at mild conditions (513 K and 3.5 MPa of H2 pressure). Appropriate Nb species improved the dispersion of Ni species, which may supply more hydrogenation active sites. Two possible reaction routes of stearic acid were proposed, and the hydrogenolysis of stearyl stearate was confirmed as the rate-determining step based on the kinetics experiments. Because of moderate acidity of Nb species, the ratio of C17/C18 alkane was not markedly affected by reaction conditions when the conversion of stearic acid was higher than 99%. Moreover, catalyst Ni0.5Nb0.5Oz showed a high recycle ability and compatibility for other long-chain fatty acids, demonstrating that catalyst Ni0.5Nb0.5Oz is a promising green catalyst for producing biodiesel from fatty acids. |
doi_str_mv | 10.1016/j.fuel.2020.118842 |
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Catalytic deoxygenation of fatty acids to alkanes is an ideal route to produce biodiesel with high heating value. However, traditional transition-metal sulfide and noble metal catalysts are sulfide-contaminated, high cost, or easily poisoned. To overcome the above issues, this work developed a non-noble and sulfide-free reduced transition-metal composite NixNbyOz, which was effective to selectively hydrogenate stearic acid, a typical fatty acid model compound, to diesel-range alkanes. By using a simple slurry method, reduced NixNbyOz catalysts have been successfully prepared with an outstanding catalytic performance. The results showed that catalyst Ni0.5Nb0.5Oz effectively converted stearic acid to n-alkanes with nearly 100% conversion and >99% n-alkanes selectivity at mild conditions (513 K and 3.5 MPa of H2 pressure). Appropriate Nb species improved the dispersion of Ni species, which may supply more hydrogenation active sites. Two possible reaction routes of stearic acid were proposed, and the hydrogenolysis of stearyl stearate was confirmed as the rate-determining step based on the kinetics experiments. Because of moderate acidity of Nb species, the ratio of C17/C18 alkane was not markedly affected by reaction conditions when the conversion of stearic acid was higher than 99%. Moreover, catalyst Ni0.5Nb0.5Oz showed a high recycle ability and compatibility for other long-chain fatty acids, demonstrating that catalyst Ni0.5Nb0.5Oz is a promising green catalyst for producing biodiesel from fatty acids.</description><identifier>ISSN: 0016-2361</identifier><identifier>EISSN: 1873-7153</identifier><identifier>DOI: 10.1016/j.fuel.2020.118842</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Acidity ; Alkanes ; Biodiesel ; Biodiesel fuels ; Biofuels ; Calorific value ; Catalysts ; Catalytic converters ; Composite materials ; Conversion ; Deoxygenation ; Diesel ; Fatty acids ; Hydrodeoxygenation ; Hydrogenation ; Hydrogenolysis ; n-Alkane ; Nickel ; Niobium ; Noble metals ; Reduced NixNbyOz catalyst ; Selectivity ; Slurries ; Species ; Stearic acid ; Sulfide ; Sulfides ; Transition metals</subject><ispartof>Fuel (Guildford), 2020-12, Vol.282, p.118842, Article 118842</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Dec 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-311de6b4b6e23c063c468951cedc19b91d5757b048234b6336fd25a9c9e518423</citedby><cites>FETCH-LOGICAL-c328t-311de6b4b6e23c063c468951cedc19b91d5757b048234b6336fd25a9c9e518423</cites><orcidid>0000-0003-4141-5731 ; 0000-0003-0254-2914</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.fuel.2020.118842$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Chen, Lei</creatorcontrib><creatorcontrib>Li, Guangci</creatorcontrib><creatorcontrib>Zhang, Mingjie</creatorcontrib><creatorcontrib>Wang, Da</creatorcontrib><creatorcontrib>Li, Shuangju</creatorcontrib><creatorcontrib>Zhang, Chuanhui</creatorcontrib><creatorcontrib>Li, Xuebing</creatorcontrib><creatorcontrib>Chung, Keng H.</creatorcontrib><title>Preparation of reduced Ni-Nb-O composite hydrogenation catalysts for highly selective conversion of free fatty acids to n-alkanes</title><title>Fuel (Guildford)</title><description>[Display omitted]
Catalytic deoxygenation of fatty acids to alkanes is an ideal route to produce biodiesel with high heating value. However, traditional transition-metal sulfide and noble metal catalysts are sulfide-contaminated, high cost, or easily poisoned. To overcome the above issues, this work developed a non-noble and sulfide-free reduced transition-metal composite NixNbyOz, which was effective to selectively hydrogenate stearic acid, a typical fatty acid model compound, to diesel-range alkanes. By using a simple slurry method, reduced NixNbyOz catalysts have been successfully prepared with an outstanding catalytic performance. The results showed that catalyst Ni0.5Nb0.5Oz effectively converted stearic acid to n-alkanes with nearly 100% conversion and >99% n-alkanes selectivity at mild conditions (513 K and 3.5 MPa of H2 pressure). Appropriate Nb species improved the dispersion of Ni species, which may supply more hydrogenation active sites. Two possible reaction routes of stearic acid were proposed, and the hydrogenolysis of stearyl stearate was confirmed as the rate-determining step based on the kinetics experiments. Because of moderate acidity of Nb species, the ratio of C17/C18 alkane was not markedly affected by reaction conditions when the conversion of stearic acid was higher than 99%. Moreover, catalyst Ni0.5Nb0.5Oz showed a high recycle ability and compatibility for other long-chain fatty acids, demonstrating that catalyst Ni0.5Nb0.5Oz is a promising green catalyst for producing biodiesel from fatty acids.</description><subject>Acidity</subject><subject>Alkanes</subject><subject>Biodiesel</subject><subject>Biodiesel fuels</subject><subject>Biofuels</subject><subject>Calorific value</subject><subject>Catalysts</subject><subject>Catalytic converters</subject><subject>Composite materials</subject><subject>Conversion</subject><subject>Deoxygenation</subject><subject>Diesel</subject><subject>Fatty acids</subject><subject>Hydrodeoxygenation</subject><subject>Hydrogenation</subject><subject>Hydrogenolysis</subject><subject>n-Alkane</subject><subject>Nickel</subject><subject>Niobium</subject><subject>Noble metals</subject><subject>Reduced NixNbyOz catalyst</subject><subject>Selectivity</subject><subject>Slurries</subject><subject>Species</subject><subject>Stearic acid</subject><subject>Sulfide</subject><subject>Sulfides</subject><subject>Transition metals</subject><issn>0016-2361</issn><issn>1873-7153</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFPA89Z87Gaz4EWKX1BaD3oO2exsm7rd1CQt7NF_bsp69jQwPO_My4PQLSUzSqi4387aA3QzRlhaUClzdoYmVJY8K2nBz9GEJCpjXNBLdBXClhBSyiKfoJ93D3vtdbSux67FHpqDgQYvbbassxU2brd3wUbAm6Hxbg39iBoddTeEGHDrPN7Y9aYbcIAOTLRHSLH-CD78HW09AG51jAPWxjYBR4f7THdfuodwjS5a3QW4-ZtT9Pn89DF_zRarl7f54yIznMmYcUobEHVeC2DcEMFNLmRV0FTW0KquaFOURVmTXDKeIM5F27BCV6aCgiYffIruxrt7774PEKLauoPv00vFcpFLwWVFEsVGyngXgodW7b3daT8oStRJtdqqk2p1Uq1G1Sn0MIYg9T9a8CoYC32qZn0Sohpn_4v_Age_iKI</recordid><startdate>20201215</startdate><enddate>20201215</enddate><creator>Chen, Lei</creator><creator>Li, Guangci</creator><creator>Zhang, Mingjie</creator><creator>Wang, Da</creator><creator>Li, Shuangju</creator><creator>Zhang, Chuanhui</creator><creator>Li, Xuebing</creator><creator>Chung, Keng H.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><orcidid>https://orcid.org/0000-0003-4141-5731</orcidid><orcidid>https://orcid.org/0000-0003-0254-2914</orcidid></search><sort><creationdate>20201215</creationdate><title>Preparation of reduced Ni-Nb-O composite hydrogenation catalysts for highly selective conversion of free fatty acids to n-alkanes</title><author>Chen, Lei ; Li, Guangci ; Zhang, Mingjie ; Wang, Da ; Li, Shuangju ; Zhang, Chuanhui ; Li, Xuebing ; Chung, Keng H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-311de6b4b6e23c063c468951cedc19b91d5757b048234b6336fd25a9c9e518423</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Acidity</topic><topic>Alkanes</topic><topic>Biodiesel</topic><topic>Biodiesel fuels</topic><topic>Biofuels</topic><topic>Calorific value</topic><topic>Catalysts</topic><topic>Catalytic converters</topic><topic>Composite materials</topic><topic>Conversion</topic><topic>Deoxygenation</topic><topic>Diesel</topic><topic>Fatty acids</topic><topic>Hydrodeoxygenation</topic><topic>Hydrogenation</topic><topic>Hydrogenolysis</topic><topic>n-Alkane</topic><topic>Nickel</topic><topic>Niobium</topic><topic>Noble metals</topic><topic>Reduced NixNbyOz catalyst</topic><topic>Selectivity</topic><topic>Slurries</topic><topic>Species</topic><topic>Stearic acid</topic><topic>Sulfide</topic><topic>Sulfides</topic><topic>Transition metals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Lei</creatorcontrib><creatorcontrib>Li, Guangci</creatorcontrib><creatorcontrib>Zhang, Mingjie</creatorcontrib><creatorcontrib>Wang, Da</creatorcontrib><creatorcontrib>Li, Shuangju</creatorcontrib><creatorcontrib>Zhang, Chuanhui</creatorcontrib><creatorcontrib>Li, Xuebing</creatorcontrib><creatorcontrib>Chung, Keng H.</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Biotechnology Research Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Fuel (Guildford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Lei</au><au>Li, Guangci</au><au>Zhang, Mingjie</au><au>Wang, Da</au><au>Li, Shuangju</au><au>Zhang, Chuanhui</au><au>Li, Xuebing</au><au>Chung, Keng H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation of reduced Ni-Nb-O composite hydrogenation catalysts for highly selective conversion of free fatty acids to n-alkanes</atitle><jtitle>Fuel (Guildford)</jtitle><date>2020-12-15</date><risdate>2020</risdate><volume>282</volume><spage>118842</spage><pages>118842-</pages><artnum>118842</artnum><issn>0016-2361</issn><eissn>1873-7153</eissn><abstract>[Display omitted]
Catalytic deoxygenation of fatty acids to alkanes is an ideal route to produce biodiesel with high heating value. However, traditional transition-metal sulfide and noble metal catalysts are sulfide-contaminated, high cost, or easily poisoned. To overcome the above issues, this work developed a non-noble and sulfide-free reduced transition-metal composite NixNbyOz, which was effective to selectively hydrogenate stearic acid, a typical fatty acid model compound, to diesel-range alkanes. By using a simple slurry method, reduced NixNbyOz catalysts have been successfully prepared with an outstanding catalytic performance. The results showed that catalyst Ni0.5Nb0.5Oz effectively converted stearic acid to n-alkanes with nearly 100% conversion and >99% n-alkanes selectivity at mild conditions (513 K and 3.5 MPa of H2 pressure). Appropriate Nb species improved the dispersion of Ni species, which may supply more hydrogenation active sites. Two possible reaction routes of stearic acid were proposed, and the hydrogenolysis of stearyl stearate was confirmed as the rate-determining step based on the kinetics experiments. Because of moderate acidity of Nb species, the ratio of C17/C18 alkane was not markedly affected by reaction conditions when the conversion of stearic acid was higher than 99%. Moreover, catalyst Ni0.5Nb0.5Oz showed a high recycle ability and compatibility for other long-chain fatty acids, demonstrating that catalyst Ni0.5Nb0.5Oz is a promising green catalyst for producing biodiesel from fatty acids.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.fuel.2020.118842</doi><orcidid>https://orcid.org/0000-0003-4141-5731</orcidid><orcidid>https://orcid.org/0000-0003-0254-2914</orcidid></addata></record> |
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subjects | Acidity Alkanes Biodiesel Biodiesel fuels Biofuels Calorific value Catalysts Catalytic converters Composite materials Conversion Deoxygenation Diesel Fatty acids Hydrodeoxygenation Hydrogenation Hydrogenolysis n-Alkane Nickel Niobium Noble metals Reduced NixNbyOz catalyst Selectivity Slurries Species Stearic acid Sulfide Sulfides Transition metals |
title | Preparation of reduced Ni-Nb-O composite hydrogenation catalysts for highly selective conversion of free fatty acids to n-alkanes |
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