木屑及其水热炭的热解特性和动力学对比
为全面了解木屑及其水热炭的差异,获取更多关于水热炭作为化工燃料的使用特性。该文使用热重分析仪和傅里叶红外光谱仪对比研究了木屑及其水热炭在热解过程（10℃/min升温速率）中的失重特性及其官能团变化,分析了升温速率（10、20、30℃/min）对2种样品热解失重过程的影响,采用DAEM（分布活化能模型）计算了2种样品不同转化率下的活化能。结果表明：1）在200℃反应6 h得到的木屑水热炭,化学结构与木屑相似。2）在热解过程（10℃/min升温速率）中,木屑与水热炭最大失重速率分别为0.817%/℃和1.224%/℃,温度为353.57℃和363.42℃;不同终温下半焦红外光谱分析发现,水热炭更易...
Saved in:
| Published in | 农业工程学报 Vol. 33; no. 4; pp. 258 - 264 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
合肥工业大学先进能源技术与装备研究院,合肥 230009
2017
合肥工业大学汽车与交通工程学院,合肥 230009%合肥工业大学机械工程学院,合肥,230009%合肥工业大学化学与化工学院,合肥,230009 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2017.04.035 |
Cover
| Abstract | 为全面了解木屑及其水热炭的差异,获取更多关于水热炭作为化工燃料的使用特性。该文使用热重分析仪和傅里叶红外光谱仪对比研究了木屑及其水热炭在热解过程（10℃/min升温速率）中的失重特性及其官能团变化,分析了升温速率（10、20、30℃/min）对2种样品热解失重过程的影响,采用DAEM（分布活化能模型）计算了2种样品不同转化率下的活化能。结果表明：1）在200℃反应6 h得到的木屑水热炭,化学结构与木屑相似。2）在热解过程（10℃/min升温速率）中,木屑与水热炭最大失重速率分别为0.817%/℃和1.224%/℃,温度为353.57℃和363.42℃;不同终温下半焦红外光谱分析发现,水热炭更易解聚,其碳化速度更快。3）对比3种不同升温速率下2种样品的失重曲线可知,水热处理没有影响热滞后现象,样品焦炭生成量与升温速率无关,焦炭生成量平均值水热炭大于木屑。4）DAEM模型适用于2种样品热解反应活化能的求解,木屑及其水热炭活化能分别为99.33-252.72 k J/mol和63.77-211.68 k J/mol,当转化率在0.30到0.80范围时,木屑的活化能高于水热炭。研究结果为木屑水热炭热化学转化制备焦炭提供理论依据。 |
|---|---|
| AbstractList | 为全面了解木屑及其水热炭的差异,获取更多关于水热炭作为化工燃料的使用特性。该文使用热重分析仪和傅里叶红外光谱仪对比研究了木屑及其水热炭在热解过程（10℃/min升温速率）中的失重特性及其官能团变化,分析了升温速率（10、20、30℃/min）对2种样品热解失重过程的影响,采用DAEM（分布活化能模型）计算了2种样品不同转化率下的活化能。结果表明：1）在200℃反应6 h得到的木屑水热炭,化学结构与木屑相似。2）在热解过程（10℃/min升温速率）中,木屑与水热炭最大失重速率分别为0.817%/℃和1.224%/℃,温度为353.57℃和363.42℃;不同终温下半焦红外光谱分析发现,水热炭更易解聚,其碳化速度更快。3）对比3种不同升温速率下2种样品的失重曲线可知,水热处理没有影响热滞后现象,样品焦炭生成量与升温速率无关,焦炭生成量平均值水热炭大于木屑。4）DAEM模型适用于2种样品热解反应活化能的求解,木屑及其水热炭活化能分别为99.33-252.72 k J/mol和63.77-211.68 k J/mol,当转化率在0.30到0.80范围时,木屑的活化能高于水热炭。研究结果为木屑水热炭热化学转化制备焦炭提供理论依据。 TK6; 为全面了解木屑及其水热炭的差异,获取更多关于水热炭作为化工燃料的使用特性.该文使用热重分析仪和傅里叶红外光谱仪对比研究了木屑及其水热炭在热解过程(10℃/min升温速率)中的失重特性及其官能团变化,分析了升温速率(10、20、30℃/min)对2种样品热解失重过程的影响,采用DAEM(分布活化能模型)计算了2种样品不同转化率下的活化能.结果表明:1)在200℃反应6 h得到的木屑水热炭,化学结构与木屑相似.2)在热解过程(10℃/min升温速率)中,木屑与水热炭最大失重速率分别为0.817%/℃和1.224%/℃,温度为353.57℃和363.42℃;不同终温下半焦红外光谱分析发现,水热炭更易解聚,其碳化速度更快.3)对比3种不同升温速率下2种样品的失重曲线可知,水热处理没有影响热滞后现象,样品焦炭生成量与升温速率无关,焦炭生成量平均值水热炭大于木屑.4)DAEM模型适用于2种样品热解反应活化能的求解,木屑及其水热炭活化能分别为99.33~252.72 kJ/mol和63.77~211.68 kJ/mol,当转化率在0.30到0.80范围时,木屑的活化能高于水热炭.研究结果为木屑水热炭热化学转化制备焦炭提供理论依据. |
| Abstract_FL | Rapid industrialization and urbanization have brought a severe problem of energy shortage and environmental pollution into our life. As the fourth-largest energy, Nowadays,Lignocellulosic biomass is increasingly regarded as an eco-friendly renewable feedstock for producing various bio-based products. Recently, hydrothermal carbonization (HTC) as a hot topic has attracted a great deal of attention because the process requirements of HTC are comparably low and are able to treat wet feedstock without an energy extensive drying process. But so far, some literatures have focused on the morphology, chemical structure and adsorption capacity of hydrochar, etc. Only few reports have provided a detailed description on the kinetic analysis of hydrochar. Pyrolysis is considered as the first step of the process of gasification, liquefaction, carbonization, and combustion. On the other side, the knowledge of the pyrolysis kinetics is fundament for predicting the pyrolysis behavior of materials and the design of the suitable reactor. In this study, pine sawdust was provided by a factory in Anhui province in 2015. The hydrochar was hydrothermally obtained from 5 g of sawdust immersed in 40 mL of distilled water in the stainless steel autoclave keeping temperature at 200℃ for 6 h, then as-prepared hydrochar was dried in an oven at 105℃ for 24 h. Pyrolysis characteristics and organic structure of both pine sawdust and hydrochar were investigated via thermogravimetric analysis and Fourier transformation infrared spectrometer, respectively. Different heating rates (10, 20, 30℃/min) were chosen to study the influence of pyrolysis process. Meanwhile, the distributed activation energy model (DAEM) was used to study the pyrolysis kinetics by means of the relation between conversion rate and activation energy. The results indicated that : 1) Compared with pine sawdust organic structure of hydrochar treated by hydrothermal carbonization process was changed, and the organic function groups of pine sawdust and hydrochar decreased in the different ways with the increase of pyrolysis temperature, but the organic function groups of hydrochar decreased faster than pine sawdust's when the temperature was over 200℃; 2) Thermogravimetric curves showed that hydrochar needed higher temperature and led to the faster loss weight rates than pine sawdust during the pyrolysis process, but the trend of thermogravimetric curves of both products changing with heating rates was same; 3) The values of pyrolysis activation energies of hydrochar and pine sawdust were different ranging within 99.33-252.72 and 63.77-211.68 kJ/mol, respectively. But the trends of the pyrolysis activation energies of hydrochar and pine sawdust were very similar with the increment of conversion rate. In summary, hydrothermal treatment process destroyed organic functional groups and lowered volatile content of pine sawdust, resulting in the changes of pyrolysis characteristics. Specifically, the whole pyrolysis process shifted to higher temperature, the reaction rate was accelerated and the main pyrolysis process occurred in a narrower temperature range shortening the pyrolysis time. Activation energy also was influenced due to the hydrothermal process, leading the reduction of the values at the dominating stage of volatile loss, however, the increase of the values at the initial and final stage of volatile loss. This study provides reference for pyrolysis and mechanism of hydrochar production. |
| Author | 邢献军 杨静 范方宇 李永玲 张贤文 |
| AuthorAffiliation | 合肥工业大学先进能源技术与装备研究院,合肥230009 合肥工业大学汽车与交通工程学院,合肥230009 合肥工业大学机械工程学院,合肥230009 合肥工业大学化学与化工学院,合肥230009 |
| AuthorAffiliation_xml | – name: 合肥工业大学先进能源技术与装备研究院,合肥 230009;合肥工业大学汽车与交通工程学院,合肥 230009%合肥工业大学机械工程学院,合肥,230009%合肥工业大学化学与化工学院,合肥,230009 |
| Author_FL | Xing Xianjun Li Yongling Yang Jing Fan Fangyu Zhang Xianwen |
| Author_FL_xml | – sequence: 1 fullname: Xing Xianjun – sequence: 2 fullname: Yang Jing – sequence: 3 fullname: Fan Fangyu – sequence: 4 fullname: Li Yongling – sequence: 5 fullname: Zhang Xianwen |
| Author_xml | – sequence: 1 fullname: 邢献军 杨静 范方宇 李永玲 张贤文 |
| BookMark | eNo9j01Lw0AYhPdQwVr7JwTxlPi-2d1k9yjFLyh46b1s0k1N0a02iPYmfhwMgiie1JtgeylVEKE_aBN_hpGKpxmGhxlmiVRM32hCVhFcRBnw9Z6bpKlxEcBzfIHS9QADF5gLlFdI9T9fJPU0TULgSAMAhlXi5y9j-3Fv7zJ7_ZW_fxaXk-JiUjxdleZ79FrczPLzkX24tdnYZs928mans3z6uEwWYnWQ6vqf1khra7PV2HGae9u7jY2mE3HJHcG8SHcUpUyIDsgYmZBUMNA-Mo6gdCA9HZeqfL8TQ4iAkkZAFReKilDTGlmb154qEyvTbff6JwNTDrbNsBudhb83gZUnS3JlTkb7fdM9Tkr2aJAcqsGw7QfoAwVP0h__Imma |
| ClassificationCodes | TK6 |
| ContentType | Journal Article |
| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
| Copyright_xml | – notice: Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
| DBID | 2RA 92L CQIGP W95 ~WA 2B. 4A8 92I 93N PSX TCJ |
| DOI | 10.11975/j.issn.1002-6819.2017.04.035 |
| DatabaseName | 维普期刊资源整合服务平台 中文科技期刊数据库-CALIS站点 维普中文期刊数据库 中文科技期刊数据库-农业科学 中文科技期刊数据库- 镜像站点 Wanfang Data Journals - Hong Kong WANFANG Data Centre Wanfang Data Journals 万方数据期刊 - 香港版 China Online Journals (COJ) China Online Journals (COJ) |
| DatabaseTitleList | |
| DeliveryMethod | fulltext_linktorsrc |
| Discipline | Agriculture |
| DocumentTitleAlternate | Comparison of pyrolysis characteristics and kinetics of sawdust and its hydrochar |
| DocumentTitle_FL | Comparison of pyrolysis characteristics and kinetics of sawdust and its hydrochar |
| EndPage | 264 |
| ExternalDocumentID | nygcxb201704035 671603029 |
| GrantInformation_xml | – fundername: 国家科技支撑计划 funderid: (2012BAD30B01) |
| GroupedDBID | -04 2B. 2B~ 2RA 5XA 5XE 92G 92I 92L ABDBF ABJNI ACGFO ACGFS AEGXH AIAGR ALMA_UNASSIGNED_HOLDINGS CCEZO CHDYS CQIGP CW9 EOJEC FIJ IPNFZ OBODZ RIG TCJ TGD TUS U1G U5N W95 ~WA 4A8 93N ACUHS PSX |
| ID | FETCH-LOGICAL-c595-842ceda33488d09f14893840e614510ae792ef0aea66df0b10193c03a58a38be3 |
| ISSN | 1002-6819 |
| IngestDate | Thu May 29 04:04:20 EDT 2025 Wed Feb 14 10:03:55 EST 2024 |
| IsPeerReviewed | false |
| IsScholarly | true |
| Issue | 4 |
| Keywords | 水热炭 pyrolysis 木屑 sawdust 活化能 热解 activation energy 傅里叶红外光谱 hydrochar fourier infrared spectrum |
| Language | Chinese |
| LinkModel | OpenURL |
| MergedId | FETCHMERGED-LOGICAL-c595-842ceda33488d09f14893840e614510ae792ef0aea66df0b10193c03a58a38be3 |
| Notes | 11-2047/S sawdust; pyrolysis; activation energy; hydrochar; fourier infrared spectrum Xing Xianjun1,2, Yang Jing3, Fan Fangyu4, Li Yongling3, Zhang Xianwen1,2 （1. Institute of Advanced Energy Technology ＆ Equipment, Hefei University of Technology, Hefei 230009, China; 2. School of Automobile and Transportation Engineering, Hefei University of Technology, Hefei 230009, China; 3. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China; 4. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China） Rapid industrialization and urbanization have brought a severe problem of energy shortage and environmental pollution into our life. As the fourth-largest energy, Nowadays, Lignocellulosic biomass is increasingly regarded as an eco-friendly renewable feedstock for producing various bio-based products. Recently, hydrothermal carbonization （HTC） as a hot topic has attracted a great deal of attention because the process requirements of HTC are comparably l |
| PageCount | 7 |
| ParticipantIDs | wanfang_journals_nygcxb201704035 chongqing_primary_671603029 |
| PublicationCentury | 2000 |
| PublicationDate | 2017 |
| PublicationDateYYYYMMDD | 2017-01-01 |
| PublicationDate_xml | – year: 2017 text: 2017 |
| PublicationDecade | 2010 |
| PublicationTitle | 农业工程学报 |
| PublicationTitleAlternate | Transactions of the Chinese Society of Agricultural Engineering |
| PublicationTitle_FL | Transactions of the Chinese Society of Agricultural Engineering |
| PublicationYear | 2017 |
| Publisher | 合肥工业大学先进能源技术与装备研究院,合肥 230009 合肥工业大学汽车与交通工程学院,合肥 230009%合肥工业大学机械工程学院,合肥,230009%合肥工业大学化学与化工学院,合肥,230009 |
| Publisher_xml | – name: 合肥工业大学先进能源技术与装备研究院,合肥 230009 – name: 合肥工业大学汽车与交通工程学院,合肥 230009%合肥工业大学机械工程学院,合肥,230009%合肥工业大学化学与化工学院,合肥,230009 |
| SSID | ssib051370041 ssib017478172 ssj0041925 ssib001101065 ssib023167668 |
| Score | 2.1506722 |
| Snippet | ... TK6;... |
| SourceID | wanfang chongqing |
| SourceType | Aggregation Database Publisher |
| StartPage | 258 |
| SubjectTerms | 傅里叶红外光谱 木屑 水热炭 活化能 热解 |
| Title | 木屑及其水热炭的热解特性和动力学对比 |
| URI | http://lib.cqvip.com/qk/90712X/201704/671603029.html https://d.wanfangdata.com.cn/periodical/nygcxb201704035 |
| Volume | 33 |
| hasFullText | 1 |
| inHoldings | 1 |
| isFullTextHit | |
| isPrint | |
| link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnV3Na9RAFB_6AaIH8RNrVXpwTpKaTJLJm2Oym6UIeqrQ25Jkk-1pq3UL2pP4cbAIonhSb4LtpVZBhP5B2fXP8L3JbDa04tcl-3Yy875-ybyZMPOGseuJggynx9IC5aSW5_akpZSXWSn2jIUrXJkBbRS-fUeu3PVurflrM7OfG6uWtobpcrb9y30l_4MqliGutEv2H5CtmWIB0ogvXhFhvP4VxjyWXLV4CDz2eeRw5RABHQ6hJrBQUp3I5pHH44CDy8O2JoQhVMiheQt4GPDQ1SWKR4qag02FyFAJDi3NOTRCkVAREdg2lJromFZIVAcLT8a-ur5WOPZ4BCSa1EZxPolDhtBkJbUUf_JE8FhprYVWDY2OJ_yiaRX819aaKSKUmt4BaoM2UhWpNfSJxTQMm8YQTxwGWlDMI9H8MlJtAdVPsfaIzQE0d6HNqO1pWBh6xn21jxCYqlXU0e4D0ixqa8kh8ayMB3sCcMcwJO2A4AHfcIZA-85GX2tCacjRfEWuEq3jSt7A6aBtq0Y0onAlwcQUE66qvCHmtfSasafKgW-GMaJKDn88QqrA1yGSJCzXEmiRY6CT_lbZY44kIR886mcPU6qDnb7rz7J5EQSOP8fmw6gddaYDcIe-MdQRQlCeBTmd0PqOS8cp1IuwaAmCr9cjGDVOMD5R8ubvVKRMKOsbg_59HN_p7XaDIhn0GyPD1TPstJnSLYXV-3mWzWyvn2Onwv6mSWuTn2dy9GGv_Pq6fLVTPv8--vJt_HR__GR__O4ZEj92P45fHI4e75ZvXpY7e-XO-3L_U3lwODp4e4GtduLV1oplTiyxMl_5Fngiy3sJbW6Hnq0KhzI7gWfnks7DtpM8UCIv8DeRslfYKTpLuZntJj4kLqS5e5HNDTYG-SW2VKROLmXSK0RReK6bgRI9T3p5jgDkLuQLbLF2QPdelZimKwM6NN4WaoEtGZd0TXf1oHsEwst_rrLIThJdfXC8wuaGm1v5VRyCD9NrBvefwE2h_g |
| linkProvider | EBSCOhost |
| openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=%E6%9C%A8%E5%B1%91%E5%8F%8A%E5%85%B6%E6%B0%B4%E7%83%AD%E7%82%AD%E7%9A%84%E7%83%AD%E8%A7%A3%E7%89%B9%E6%80%A7%E5%92%8C%E5%8A%A8%E5%8A%9B%E5%AD%A6%E5%AF%B9%E6%AF%94&rft.jtitle=%E5%86%9C%E4%B8%9A%E5%B7%A5%E7%A8%8B%E5%AD%A6%E6%8A%A5&rft.au=%E9%82%A2%E7%8C%AE%E5%86%9B&rft.au=%E6%9D%A8%E9%9D%99&rft.au=%E8%8C%83%E6%96%B9%E5%AE%87&rft.au=%E6%9D%8E%E6%B0%B8%E7%8E%B2&rft.date=2017&rft.pub=%E5%90%88%E8%82%A5%E5%B7%A5%E4%B8%9A%E5%A4%A7%E5%AD%A6%E5%85%88%E8%BF%9B%E8%83%BD%E6%BA%90%E6%8A%80%E6%9C%AF%E4%B8%8E%E8%A3%85%E5%A4%87%E7%A0%94%E7%A9%B6%E9%99%A2%2C%E5%90%88%E8%82%A5+230009&rft.issn=1002-6819&rft.volume=33&rft.issue=4&rft.spage=258&rft.epage=264&rft_id=info:doi/10.11975%2Fj.issn.1002-6819.2017.04.035&rft.externalDocID=nygcxb201704035 |
| thumbnail_s | http://utb.summon.serialssolutions.com/2.0.0/image/custom?url=http%3A%2F%2Fimage.cqvip.com%2Fvip1000%2Fqk%2F90712X%2F90712X.jpg http://utb.summon.serialssolutions.com/2.0.0/image/custom?url=http%3A%2F%2Fwww.wanfangdata.com.cn%2Fimages%2FPeriodicalImages%2Fnygcxb%2Fnygcxb.jpg |