| B2O3负载量对MoO3/CeO2-Al2O3耐硫甲烷化性能的影响 |
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| 引用本文： | 刘震,王保伟,王玮涵,孟大钧,李振花,马新宾. B2O3负载量对MoO3/CeO2-Al2O3耐硫甲烷化性能的影响[J]. 化工学报, 2016, 67(9): 3672-3677. DOI: 10.11949/j.issn.0438-1157.20160317 |
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| 作者姓名： | 刘震 王保伟 王玮涵 孟大钧 李振花 马新宾 |
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| 作者单位： | 天津大学化工学院绿色合成与转化教育部重点实验室, 天津 300072 |
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| 基金项目： | 国家高技术研究发展计划项目（2015AA050504）。 |
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| 摘 要： | 考察B2O3负载量对于MoO3/CeO2-Al2O3催化剂对耐硫甲烷化活性的影响，利用BET、XRD、TEM、NH3-TPD等手段对催化剂进行了表征。结果表明，催化剂的耐硫甲烷化活性随B2O3负载量增加呈现先升高后降低的变化规律；当B2O3负载量为0.5%时，催化剂的耐硫甲烷化活性最高，CO转化率达到55%。结合表征分析，发现添加B2O3会影响催化剂载体的结构和表面酸度，从而影响活性组分的分散程度，进而影响MoO3/CeO2-Al2O3催化剂的耐硫甲烷化性能。催化剂的晶化程度太高或单位面积上的强酸量太多均不利于甲烷化反应；较好的活性组分分散度有利于催化剂甲烷化活性的提高。
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| 关 键 词： | 催化剂 甲烷化 天然气 酸改性 氧化硼 载体 |
| 收稿时间： | 2016-03-18 |
| 修稿时间： | 2016-05-09 |
Impact of B2O3 loading on sulfur-resistant methanation activity of MoO3/CeO2-Al2O3 catalyst |
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| LIU Zhen,WANG Baowei,WANG Weihan,MENG Dajun,LI Zhenhua,MA Xinbin. Impact of B2O3 loading on sulfur-resistant methanation activity of MoO3/CeO2-Al2O3 catalyst[J]. Journal of Chemical Industry and Engineering(China), 2016, 67(9): 3672-3677. DOI: 10.11949/j.issn.0438-1157.20160317 |
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| Authors: | LIU Zhen WANG Baowei WANG Weihan MENG Dajun LI Zhenhua MA Xinbin |
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| Affiliation: | Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | Synthetic natural gas (SNG) production from coal is considered again due to rising prices for natural gas, the wish for less dependency from natural gas imports and the opportunity of reducing green house gases. The technical, economic and ecological feasibility of SNG with Mo-based catalysts showed water-gas shift and sulfur-resistant methanation has been studied. In this paper the impact of B2O3 loading on the MoO3/CeO2-Al2O3 catalysts for sulfur-resistant methanation was investigated. The catalysts were prepared by impregnation method and characterized by means of BET, XRD, TEM and NH3-TPD. The results showed that the sulfur-resistant methanation activity of MoO3/CeO2-Al2O3 catalysts were increased at first and then decreased as the increase of B2O3 loading. The catalyst adding 0.5% B2O3 showed the highest activity and the conversion of CO was 55%. The characterization results indicated that the addition of B2O3 had influences on the structure and surface acidity of catalysts and the dispersion of active components, which further impacted the activity of catalysts. High-crystallization and enhancement of strong acid quantity were not beneficial to the sulfur-resistant methanation, while the high dispersion of active components was favorable to the improvement of the catalyst activity. |
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| Keywords: | catalyst methanation natural gas acid modification B2O3 support |
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