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Catalytic activities of K-modified zeolite ZSM-5 supported rhodium catalysts in low-temperature steam reforming of bioethanol
Lang, Lin1; Zhao, Shuheng1,2; Yin, Xiuli1; Yang, Wenshen1; Wu, Chuangzhi1
2015-08-24
发表期刊INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷号40期号:32页码:9924-9934
摘要Recently, zeolite materials have attracted attention as efficient catalysts for low-temperature steam reforming of bioethanol (SRE). However, cost-effective zeolite ZSM-5 materials, one of the most popular industrial reforming catalysts, were rarely reported for SRE. In this study, low-load rhodium (Rh) catalysts are prepared using commercial high-silica zeolite ZSM-5 as the supports. The commercial zeolite ZSM-5 has strong acidic sites that lead to fairly extensive dehydration of bioethanol. To generate basic sites and mesoporous structure, zeolite supports are modified by K ion exchange and alkali treatment. The effect of the physicochemical properties of the modified supports on low-temperature SRE reaction is investigated by SEM, TEM, XRD, XRF, TPD, NMR and N-2 adsorption. The results indicate that strong acidic sites in zeolite ZSM-5 can be effectively neutralized by K ion exchange, while basic sites in zeolite ZSM-5 are noticeably altered only by alkali treatment. The hydrogen selectivity can be significantly promoted by the alkalinity of the zeolite KZSM-5, however, only the moderate alkali-treated Rh/S2 catalyst retains its high activity during reaction. Our results appear to demonstrate the positive effect of the special zeolitic structure of the Rh/52 catalyst with uniform mesopores, which can improve the Rh dispersion and avoid its sintering. Moreover, there seem to be a unique synergy between the Rh active component and the alkali-treated zeolite support, which might result in the lowest CO selectivity at 300-400 degrees C. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
文章类型Article
关键词Hydrogen Production Stream Reforming Of Bioethanol Zeolite Zsm-5 Modification Rh-based Catalysts
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijhydene.2015.06.016
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]HYDROGEN-PRODUCTION ; PRODUCE HYDROGEN ; ETHANOL ; TRANSPORTATION ; BIOMASS ; FUELS ; NI
收录类别SCI
语种英语
WOS类目Chemistry, Physical ; Electrochemistry ; Energy & Fuels
WOS记录号WOS:000359030100007
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10839
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Lang, Lin,Zhao, Shuheng,Yin, Xiuli,et al. Catalytic activities of K-modified zeolite ZSM-5 supported rhodium catalysts in low-temperature steam reforming of bioethanol[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2015,40(32):9924-9934.
APA Lang, Lin,Zhao, Shuheng,Yin, Xiuli,Yang, Wenshen,&Wu, Chuangzhi.(2015).Catalytic activities of K-modified zeolite ZSM-5 supported rhodium catalysts in low-temperature steam reforming of bioethanol.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,40(32),9924-9934.
MLA Lang, Lin,et al."Catalytic activities of K-modified zeolite ZSM-5 supported rhodium catalysts in low-temperature steam reforming of bioethanol".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 40.32(2015):9924-9934.
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