High temperature ammonia treatment of pitch particulates and fibers for nitrogen enriched microporous carbons
One step pyrolysis/activation of fine powder and fiber from anthracene oil-based pitch in ammonia atmosphere was successfully applied for producing microporous nitrogen enriched carbons. In the process, the preoxidized precursor was heat-treated in ammonia flow at 2 K/min to the final temperature in...
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Veröffentlicht in: | Fuel processing technology 2014-03, Vol.119, p.211-217 |
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creator | SWIETLIK, Urszula GRZYB, Bartosz TORCHAŁA, Kamila GRYGLEWICZ, Grażyna MACHNIKOWSKI, Jacek |
description | One step pyrolysis/activation of fine powder and fiber from anthracene oil-based pitch in ammonia atmosphere was successfully applied for producing microporous nitrogen enriched carbons. In the process, the preoxidized precursor was heat-treated in ammonia flow at 2 K/min to the final temperature in the range of 300-900 [degrees]C with 0.5 h soak. The intensive reaction of pitch powder with ammonia at 750-800 [degrees]C results in N uptake of -10 wt.% and generation of micropores of mean width 0.53-0.67 nm and very narrow pore size distribution (PSD). XPS analysis shows mostly pyridinic nitrogen. Not only increasing process temperature induces enhancement of micropore surface area (S sub(micro)) to 900 m super(2) g super(-1) but also widening PSD and reduction of nitrogen content. Similar behavior is observed on the ammonia activation of pitch fibers. The advantage of using fibrous precursor is a higher nitrogen uptake (12 wt.%) which can be combined with S sub(micro) of 880 m super(2) g super(1) and narrow PSD around 0.8 nm. The ammonia activation of stabilized pitch fibers seems to be a feasible route for producing nitrogen enriched microporous activated carbon fibers of narrow PSD and controllable pore width. |
doi_str_mv | 10.1016/j.fuproc.2013.11.009 |
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In the process, the preoxidized precursor was heat-treated in ammonia flow at 2 K/min to the final temperature in the range of 300-900 [degrees]C with 0.5 h soak. The intensive reaction of pitch powder with ammonia at 750-800 [degrees]C results in N uptake of -10 wt.% and generation of micropores of mean width 0.53-0.67 nm and very narrow pore size distribution (PSD). XPS analysis shows mostly pyridinic nitrogen. Not only increasing process temperature induces enhancement of micropore surface area (S sub(micro)) to 900 m super(2) g super(-1) but also widening PSD and reduction of nitrogen content. Similar behavior is observed on the ammonia activation of pitch fibers. The advantage of using fibrous precursor is a higher nitrogen uptake (12 wt.%) which can be combined with S sub(micro) of 880 m super(2) g super(1) and narrow PSD around 0.8 nm. The ammonia activation of stabilized pitch fibers seems to be a feasible route for producing nitrogen enriched microporous activated carbon fibers of narrow PSD and controllable pore width.</description><subject>Activation</subject><subject>Ammonia</subject><subject>Carbon</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Enrichment</subject><subject>Exact sciences and technology</subject><subject>Fibers</subject><subject>General and physical chemistry</subject><subject>Heat treatment</subject><subject>Porosity</subject><subject>Porous materials</subject><subject>Precursors</subject><issn>0378-3820</issn><issn>1873-7188</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkTFvFDEUhC1EJI6Ef0DhJhLNLvbaXtsliiBBikQDtfXW95zzadfe2N6Cf89GF9FC9ZqZeaP5CPnIWc8ZHz-f-7CtJft-YFz0nPeM2TfkwI0WnebGvCUHJrTphBnYO_K-1jNjTCmrD2R5iE8n2nBZsUDbClJYlpwi0FYQ2oKp0RzoGps_0RVKi36boWGlkI40xAlLpSEXmmIr-QkTxVSiP-GRLtGXvOaSt0o9lCmnekOuAswVP7zea_Lr29efdw_d44_773dfHjsvDGudFYIpq-SgGZd4hEGIYEYMFsyopNLeMi0FTjBK1Oo4cWATA28CV37yyMQ1-XTJ3Vd53rA2t8TqcZ4h4V7H8VFry8dhD_6nVAlp1GCt_A_pICXnRpldKi_SfYJaCwa3lrhA-e04cy_M3NldmLkXZo5ztzPbbbevH6B6mEOB5GP96x2M2BtLLf4Ab_ialA</recordid><startdate>20140301</startdate><enddate>20140301</enddate><creator>SWIETLIK, Urszula</creator><creator>GRZYB, Bartosz</creator><creator>TORCHAŁA, Kamila</creator><creator>GRYGLEWICZ, Grażyna</creator><creator>MACHNIKOWSKI, Jacek</creator><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20140301</creationdate><title>High temperature ammonia treatment of pitch particulates and fibers for nitrogen enriched microporous carbons</title><author>SWIETLIK, Urszula ; GRZYB, Bartosz ; TORCHAŁA, Kamila ; GRYGLEWICZ, Grażyna ; MACHNIKOWSKI, Jacek</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-9330595427014eda233f86ef9a865457c90743eba64e75db1a0b0ac8f15cbce03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Activation</topic><topic>Ammonia</topic><topic>Carbon</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Enrichment</topic><topic>Exact sciences and technology</topic><topic>Fibers</topic><topic>General and physical chemistry</topic><topic>Heat treatment</topic><topic>Porosity</topic><topic>Porous materials</topic><topic>Precursors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>SWIETLIK, Urszula</creatorcontrib><creatorcontrib>GRZYB, Bartosz</creatorcontrib><creatorcontrib>TORCHAŁA, Kamila</creatorcontrib><creatorcontrib>GRYGLEWICZ, Grażyna</creatorcontrib><creatorcontrib>MACHNIKOWSKI, Jacek</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Fuel processing technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>SWIETLIK, Urszula</au><au>GRZYB, Bartosz</au><au>TORCHAŁA, Kamila</au><au>GRYGLEWICZ, Grażyna</au><au>MACHNIKOWSKI, Jacek</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High temperature ammonia treatment of pitch particulates and fibers for nitrogen enriched microporous carbons</atitle><jtitle>Fuel processing technology</jtitle><date>2014-03-01</date><risdate>2014</risdate><volume>119</volume><spage>211</spage><epage>217</epage><pages>211-217</pages><issn>0378-3820</issn><eissn>1873-7188</eissn><coden>FPTEDY</coden><abstract>One step pyrolysis/activation of fine powder and fiber from anthracene oil-based pitch in ammonia atmosphere was successfully applied for producing microporous nitrogen enriched carbons. In the process, the preoxidized precursor was heat-treated in ammonia flow at 2 K/min to the final temperature in the range of 300-900 [degrees]C with 0.5 h soak. The intensive reaction of pitch powder with ammonia at 750-800 [degrees]C results in N uptake of -10 wt.% and generation of micropores of mean width 0.53-0.67 nm and very narrow pore size distribution (PSD). XPS analysis shows mostly pyridinic nitrogen. Not only increasing process temperature induces enhancement of micropore surface area (S sub(micro)) to 900 m super(2) g super(-1) but also widening PSD and reduction of nitrogen content. Similar behavior is observed on the ammonia activation of pitch fibers. The advantage of using fibrous precursor is a higher nitrogen uptake (12 wt.%) which can be combined with S sub(micro) of 880 m super(2) g super(1) and narrow PSD around 0.8 nm. The ammonia activation of stabilized pitch fibers seems to be a feasible route for producing nitrogen enriched microporous activated carbon fibers of narrow PSD and controllable pore width.</abstract><cop>Amsterdam</cop><pub>Elsevier</pub><doi>10.1016/j.fuproc.2013.11.009</doi><tpages>7</tpages></addata></record> |
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subjects | Activation Ammonia Carbon Chemistry Colloidal state and disperse state Enrichment Exact sciences and technology Fibers General and physical chemistry Heat treatment Porosity Porous materials Precursors |
title | High temperature ammonia treatment of pitch particulates and fibers for nitrogen enriched microporous carbons |
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