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Steam reforming of typical small organics derived from bio-oil: Correlation of their reaction behaviors with molecular structures

机译：典型的源自生物油的小有机物的蒸汽重整：其反应行为与分子结构的关系

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摘要

This study investigated the steam reforming of a series of organic molecules with varied molecular structures (methanol, formic acid, ethanol, acetic acid, acetaldehyde, acetone, furfural, guaiacol), aiming to understand the impacts of functionalities of these organics on their reaction behaviors. The results showed that molecular structures drastically influenced reactivity and tendencies towards coking during steam reforming. Methanol and formic acid could effectively be reformed and coking was insignificant, as no cracking of C-C bonds involved in their conversion. Ethanol, acetic acid, acetaldehyde or acetone was more difficult to be reformed, and coking was significant, especially for acetone or acetaldehyde bearing the carbonyl functionality that could be retained in the precursors of coke. The substantial amount of coke formed in steam reforming of furfural and guaiacol originating from their pi-conjugated ring structures and the coke was more graphite-like. In comparison, the coke from reforming of ethanol, acetic acid, acetaldehyde or acetone were more disordered. The in situ DRIFTS studies of steam reforming indicated that the C=C and =C-H functionalities were generated even at 100 degrees C, which could contribute to coking, when they could not be effectively gasified via steam reforming.
机译：这项研究调查了一系列具有不同分子结构（甲醇，甲酸，乙醇，乙酸，乙醛，丙酮，糠醛，愈创木酚）的有机分子的蒸汽重整，旨在了解这些有机物的功能性对其反应行为的影响。 。结果表明，分子结构显着影响蒸汽重整过程中的反应性和结焦倾向。甲醇和甲酸可以有效地进行重整，焦化效果不明显，因为在转化过程中不会裂解C-C键。乙醇，乙酸，乙醛或丙酮更难重整，焦化效果显着，特别是对于具有羰基官能度且可保留在焦炭前体中的丙酮或乙醛而言。在糠醛和愈创木酚的蒸汽重整中形成的大量焦炭源自它们的pi共轭环结构，并且焦炭更像石墨。相比之下，乙醇，乙酸，乙醛或丙酮的重整产生的焦炭则更加无序。蒸汽重整的原位DRIFTS研究表明，即使在100摄氏度下，如果无法通过蒸汽重整有效地气化C = C和= C-H官能团，也可能有助于焦化。

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  • 来源
    《Fuel》 |2020年第1期|116214.1-116214.13|共13页
  • 作者

    Zhang Lijun; Yu Zhenjie; Li Jiaojiao; Zhang Shu; Hu Song; Xiang Jun; Wang Yi; Liu Qing; Hu Guangzhi; Hu Xun;

  • 作者单位

    Univ Jinan Sch Mat Sci & Engn Jinan 250022 Shandong Peoples R China;

    Nanjing Forestry Univ Coll Mat Sci & Engn Nanjing 210037 Jiangsu Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn Wuhan 430074 Hubei Peoples R China;

    Shandong Univ Sci & Technol Coll Chem & Environm Engn Key Lab Low Carbon Energy & Chem Engn Qingdao 266590 Shandong Peoples R China;

    Yunnan Univ Sch Chem Sci & Technol Key Lab Med Chem Nat Resource Minist Educ Kunming 650091 Yunnan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Steam reforming; Small organic molecules; Molecular structures; Nickel catalysts; Coke formation;

    机译：蒸汽重整;有机小分子;分子结构;镍催化剂;焦炭形成;

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