Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil
[Display omitted] •A longer lifetime and better recycling stability of Org-CaO than that of conventional CaO.•Org-CaO promoted amorphous coke formation mainly existed as O-containing aliphatic species.•Organic calcium precursor inhibited coke deposition and pore plugging of CaO.•Org-CaO with better...
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| Veröffentlicht in: | Fuel (Guildford) 2020-07, Vol.271, p.117692, Article 117692 |
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| creator | Yi, Linlin Liu, Huan Li, Meiyong Man, Gaozhi Yao, Hong |
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•A longer lifetime and better recycling stability of Org-CaO than that of conventional CaO.•Org-CaO promoted amorphous coke formation mainly existed as O-containing aliphatic species.•Organic calcium precursor inhibited coke deposition and pore plugging of CaO.•Org-CaO with better anti-sintering ability to slower irreversible deactivation.•Weaker loss of strength and density of basic sites on Org-CaO than that on conventional CaO.
The conversion of biomass wastes into upgraded bio-oil has been successfully implemented by catalytic fast pyrolysis (CFP) with CaO catalyst. The bottleneck of CFP technology is catalyst deactivation. Ex-situ catalytic pyrolysis of biomass wastes with multiple recycling of CaO from different calcium precursors were performed in a continuous fixed-bed at 500 °C. The objectives were to intensify the anti-deactivation and regenerative stability of CaO using organometallic precursor, and comprehensively distinguish the effects of calcium precursors on deactivation mechanism in terms of coke yield, coke species, structural and chemical changes et al. The results demonstrated that organic calcium precursor strengthened the recyclability of CaO catalyst during upgrading of bio-oil by showing longer lifetime and better recycling stability. Compared with conventional CaO from Ca(OH)2 (CH-CaO), the stronger deoxygenation and superior porosity of CaO from organic calcium precursors (Org-CaO) facilitated the removal of coke precursors and suppressed pore plugging. The average coke yields of CH-CaO and Org-CaO were respectively 5.1 and 2.2 g/m2. Moreover, CH-CaO promoted the aromatization of coke precursors, leading to coke existing in form of hard diamond-like structure. But coke deposited on Org-CaO exhibited softer layered graphite structure and contained more aliphatic matters. After 10 reaction/regeneration cycles, Org-CaO still kept 50% deoxygenation activity whereas CH-CaO showed almost complete deactivation. Organic calcium precursors delayed irreversible deactivation of CaO, since these precursors physically prevented the sintering and agglomeration of CaO, and chemically alleviated the loss of both the strength and density of basic sites on CaO. |
| doi_str_mv | 10.1016/j.fuel.2020.117692 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2438221706</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0016236120306876</els_id><sourcerecordid>2438221706</sourcerecordid><originalsourceid>FETCH-LOGICAL-c328t-cc8ae04f9c7428e84c5d7c061b82b9752b86176d5efe33719603ff3d664be9e53</originalsourceid><addsrcrecordid>eNp9kE1LKzEUhoMoWKt_wFXgrqfmYybJgJtL8aog6ELXIZM5KSnTyZhMCv33pu1duzrk8LznnDwI3VOyooSKh-3KZRhWjLDSoFK07AItqJK8krThl2hBClUxLug1uklpSwiRqqkXaPqIsIdx9mHEweG1ecc9GDv7vTn1cvLjBoe4MaO32JrB-rzDUwSbYwoR9zkegV0eZm8PdjhBsxkO5YnztImmPw1wuPOhCn64RVfODAnu_tcl-vr39Ll-qd7en1_Xf98qy5maK2uVAVK71sqaKVC1bXppiaCdYl0rG9YpUf7ZN-CAc0lbQbhzvBei7qCFhi_Rn_PcKYbvDGnW25DjWFZqVnPFGJVEFIqdKRtDShGcnqLfmXjQlOijWb3VR7P6aFafzZbQ4zkE5f69h6iT9TBa6H3xMus--N_iP9sdg3c</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2438221706</pqid></control><display><type>article</type><title>Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil</title><source>Access via ScienceDirect (Elsevier)</source><creator>Yi, Linlin ; Liu, Huan ; Li, Meiyong ; Man, Gaozhi ; Yao, Hong</creator><creatorcontrib>Yi, Linlin ; Liu, Huan ; Li, Meiyong ; Man, Gaozhi ; Yao, Hong</creatorcontrib><description>[Display omitted]
•A longer lifetime and better recycling stability of Org-CaO than that of conventional CaO.•Org-CaO promoted amorphous coke formation mainly existed as O-containing aliphatic species.•Organic calcium precursor inhibited coke deposition and pore plugging of CaO.•Org-CaO with better anti-sintering ability to slower irreversible deactivation.•Weaker loss of strength and density of basic sites on Org-CaO than that on conventional CaO.
The conversion of biomass wastes into upgraded bio-oil has been successfully implemented by catalytic fast pyrolysis (CFP) with CaO catalyst. The bottleneck of CFP technology is catalyst deactivation. Ex-situ catalytic pyrolysis of biomass wastes with multiple recycling of CaO from different calcium precursors were performed in a continuous fixed-bed at 500 °C. The objectives were to intensify the anti-deactivation and regenerative stability of CaO using organometallic precursor, and comprehensively distinguish the effects of calcium precursors on deactivation mechanism in terms of coke yield, coke species, structural and chemical changes et al. The results demonstrated that organic calcium precursor strengthened the recyclability of CaO catalyst during upgrading of bio-oil by showing longer lifetime and better recycling stability. Compared with conventional CaO from Ca(OH)2 (CH-CaO), the stronger deoxygenation and superior porosity of CaO from organic calcium precursors (Org-CaO) facilitated the removal of coke precursors and suppressed pore plugging. The average coke yields of CH-CaO and Org-CaO were respectively 5.1 and 2.2 g/m2. Moreover, CH-CaO promoted the aromatization of coke precursors, leading to coke existing in form of hard diamond-like structure. But coke deposited on Org-CaO exhibited softer layered graphite structure and contained more aliphatic matters. After 10 reaction/regeneration cycles, Org-CaO still kept 50% deoxygenation activity whereas CH-CaO showed almost complete deactivation. Organic calcium precursors delayed irreversible deactivation of CaO, since these precursors physically prevented the sintering and agglomeration of CaO, and chemically alleviated the loss of both the strength and density of basic sites on CaO.</description><identifier>ISSN: 0016-2361</identifier><identifier>EISSN: 1873-7153</identifier><identifier>DOI: 10.1016/j.fuel.2020.117692</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Aliphatic compounds ; Biomass ; Calcium ; Calcium hydroxide ; Calcium oxide ; CaO ; Catalysts ; Catalytic converters ; Coke ; Deactivation ; Deoxygenation ; Diamonds ; Oil wastes ; Organic precursors ; Porosity ; Precursors ; Pyrolysis ; Recyclability ; Recycling ; Regeneration ; Sintering (powder metallurgy) ; Slaked lime ; Stability ; Upgraded bio-oil ; Wastes</subject><ispartof>Fuel (Guildford), 2020-07, Vol.271, p.117692, Article 117692</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jul 1, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-cc8ae04f9c7428e84c5d7c061b82b9752b86176d5efe33719603ff3d664be9e53</citedby><cites>FETCH-LOGICAL-c328t-cc8ae04f9c7428e84c5d7c061b82b9752b86176d5efe33719603ff3d664be9e53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.fuel.2020.117692$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Yi, Linlin</creatorcontrib><creatorcontrib>Liu, Huan</creatorcontrib><creatorcontrib>Li, Meiyong</creatorcontrib><creatorcontrib>Man, Gaozhi</creatorcontrib><creatorcontrib>Yao, Hong</creatorcontrib><title>Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil</title><title>Fuel (Guildford)</title><description>[Display omitted]
•A longer lifetime and better recycling stability of Org-CaO than that of conventional CaO.•Org-CaO promoted amorphous coke formation mainly existed as O-containing aliphatic species.•Organic calcium precursor inhibited coke deposition and pore plugging of CaO.•Org-CaO with better anti-sintering ability to slower irreversible deactivation.•Weaker loss of strength and density of basic sites on Org-CaO than that on conventional CaO.
The conversion of biomass wastes into upgraded bio-oil has been successfully implemented by catalytic fast pyrolysis (CFP) with CaO catalyst. The bottleneck of CFP technology is catalyst deactivation. Ex-situ catalytic pyrolysis of biomass wastes with multiple recycling of CaO from different calcium precursors were performed in a continuous fixed-bed at 500 °C. The objectives were to intensify the anti-deactivation and regenerative stability of CaO using organometallic precursor, and comprehensively distinguish the effects of calcium precursors on deactivation mechanism in terms of coke yield, coke species, structural and chemical changes et al. The results demonstrated that organic calcium precursor strengthened the recyclability of CaO catalyst during upgrading of bio-oil by showing longer lifetime and better recycling stability. Compared with conventional CaO from Ca(OH)2 (CH-CaO), the stronger deoxygenation and superior porosity of CaO from organic calcium precursors (Org-CaO) facilitated the removal of coke precursors and suppressed pore plugging. The average coke yields of CH-CaO and Org-CaO were respectively 5.1 and 2.2 g/m2. Moreover, CH-CaO promoted the aromatization of coke precursors, leading to coke existing in form of hard diamond-like structure. But coke deposited on Org-CaO exhibited softer layered graphite structure and contained more aliphatic matters. After 10 reaction/regeneration cycles, Org-CaO still kept 50% deoxygenation activity whereas CH-CaO showed almost complete deactivation. Organic calcium precursors delayed irreversible deactivation of CaO, since these precursors physically prevented the sintering and agglomeration of CaO, and chemically alleviated the loss of both the strength and density of basic sites on CaO.</description><subject>Aliphatic compounds</subject><subject>Biomass</subject><subject>Calcium</subject><subject>Calcium hydroxide</subject><subject>Calcium oxide</subject><subject>CaO</subject><subject>Catalysts</subject><subject>Catalytic converters</subject><subject>Coke</subject><subject>Deactivation</subject><subject>Deoxygenation</subject><subject>Diamonds</subject><subject>Oil wastes</subject><subject>Organic precursors</subject><subject>Porosity</subject><subject>Precursors</subject><subject>Pyrolysis</subject><subject>Recyclability</subject><subject>Recycling</subject><subject>Regeneration</subject><subject>Sintering (powder metallurgy)</subject><subject>Slaked lime</subject><subject>Stability</subject><subject>Upgraded bio-oil</subject><subject>Wastes</subject><issn>0016-2361</issn><issn>1873-7153</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LKzEUhoMoWKt_wFXgrqfmYybJgJtL8aog6ELXIZM5KSnTyZhMCv33pu1duzrk8LznnDwI3VOyooSKh-3KZRhWjLDSoFK07AItqJK8krThl2hBClUxLug1uklpSwiRqqkXaPqIsIdx9mHEweG1ecc9GDv7vTn1cvLjBoe4MaO32JrB-rzDUwSbYwoR9zkegV0eZm8PdjhBsxkO5YnztImmPw1wuPOhCn64RVfODAnu_tcl-vr39Ll-qd7en1_Xf98qy5maK2uVAVK71sqaKVC1bXppiaCdYl0rG9YpUf7ZN-CAc0lbQbhzvBei7qCFhi_Rn_PcKYbvDGnW25DjWFZqVnPFGJVEFIqdKRtDShGcnqLfmXjQlOijWb3VR7P6aFafzZbQ4zkE5f69h6iT9TBa6H3xMus--N_iP9sdg3c</recordid><startdate>20200701</startdate><enddate>20200701</enddate><creator>Yi, Linlin</creator><creator>Liu, Huan</creator><creator>Li, Meiyong</creator><creator>Man, Gaozhi</creator><creator>Yao, Hong</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></search><sort><creationdate>20200701</creationdate><title>Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil</title><author>Yi, Linlin ; Liu, Huan ; Li, Meiyong ; Man, Gaozhi ; Yao, Hong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-cc8ae04f9c7428e84c5d7c061b82b9752b86176d5efe33719603ff3d664be9e53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aliphatic compounds</topic><topic>Biomass</topic><topic>Calcium</topic><topic>Calcium hydroxide</topic><topic>Calcium oxide</topic><topic>CaO</topic><topic>Catalysts</topic><topic>Catalytic converters</topic><topic>Coke</topic><topic>Deactivation</topic><topic>Deoxygenation</topic><topic>Diamonds</topic><topic>Oil wastes</topic><topic>Organic precursors</topic><topic>Porosity</topic><topic>Precursors</topic><topic>Pyrolysis</topic><topic>Recyclability</topic><topic>Recycling</topic><topic>Regeneration</topic><topic>Sintering (powder metallurgy)</topic><topic>Slaked lime</topic><topic>Stability</topic><topic>Upgraded bio-oil</topic><topic>Wastes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yi, Linlin</creatorcontrib><creatorcontrib>Liu, Huan</creatorcontrib><creatorcontrib>Li, Meiyong</creatorcontrib><creatorcontrib>Man, Gaozhi</creatorcontrib><creatorcontrib>Yao, Hong</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>Yi, Linlin</au><au>Liu, Huan</au><au>Li, Meiyong</au><au>Man, Gaozhi</au><au>Yao, Hong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil</atitle><jtitle>Fuel (Guildford)</jtitle><date>2020-07-01</date><risdate>2020</risdate><volume>271</volume><spage>117692</spage><pages>117692-</pages><artnum>117692</artnum><issn>0016-2361</issn><eissn>1873-7153</eissn><abstract>[Display omitted]
•A longer lifetime and better recycling stability of Org-CaO than that of conventional CaO.•Org-CaO promoted amorphous coke formation mainly existed as O-containing aliphatic species.•Organic calcium precursor inhibited coke deposition and pore plugging of CaO.•Org-CaO with better anti-sintering ability to slower irreversible deactivation.•Weaker loss of strength and density of basic sites on Org-CaO than that on conventional CaO.
The conversion of biomass wastes into upgraded bio-oil has been successfully implemented by catalytic fast pyrolysis (CFP) with CaO catalyst. The bottleneck of CFP technology is catalyst deactivation. Ex-situ catalytic pyrolysis of biomass wastes with multiple recycling of CaO from different calcium precursors were performed in a continuous fixed-bed at 500 °C. The objectives were to intensify the anti-deactivation and regenerative stability of CaO using organometallic precursor, and comprehensively distinguish the effects of calcium precursors on deactivation mechanism in terms of coke yield, coke species, structural and chemical changes et al. The results demonstrated that organic calcium precursor strengthened the recyclability of CaO catalyst during upgrading of bio-oil by showing longer lifetime and better recycling stability. Compared with conventional CaO from Ca(OH)2 (CH-CaO), the stronger deoxygenation and superior porosity of CaO from organic calcium precursors (Org-CaO) facilitated the removal of coke precursors and suppressed pore plugging. The average coke yields of CH-CaO and Org-CaO were respectively 5.1 and 2.2 g/m2. Moreover, CH-CaO promoted the aromatization of coke precursors, leading to coke existing in form of hard diamond-like structure. But coke deposited on Org-CaO exhibited softer layered graphite structure and contained more aliphatic matters. After 10 reaction/regeneration cycles, Org-CaO still kept 50% deoxygenation activity whereas CH-CaO showed almost complete deactivation. Organic calcium precursors delayed irreversible deactivation of CaO, since these precursors physically prevented the sintering and agglomeration of CaO, and chemically alleviated the loss of both the strength and density of basic sites on CaO.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.fuel.2020.117692</doi></addata></record> |
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| subjects | Aliphatic compounds Biomass Calcium Calcium hydroxide Calcium oxide CaO Catalysts Catalytic converters Coke Deactivation Deoxygenation Diamonds Oil wastes Organic precursors Porosity Precursors Pyrolysis Recyclability Recycling Regeneration Sintering (powder metallurgy) Slaked lime Stability Upgraded bio-oil Wastes |
| title | Prevention of CaO deactivation using organic calcium precursor during multicyclic catalytic upgrading of bio-oil |
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