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Design of Multiple Metal Doped ni based catalyst for Hydrogen Generation from Bio-oil Reforming at Mild-temperature

Chinese Journal of Chemical Physics 2013年第1期26卷 109-120,I0004页

作者：袁丽霞丁芳姚建铭陈祥松刘伟伟吴金勇巩飞艳李全新中科院合肥物质科学研究院等离子体物理研究所生物质能源研究中心合肥230026 中国科学技术大学安徽省生物质洁净能源重点实验室合肥230026

A new kind of multiple metal （Cu, Mg, Ce） doped ni based mixed oxide catalyst, synthesized by the co-precipitation method, was used for efficient production of hydrogen from bio-oil reforming at 250-500℃. Two reforming processes, the conventional steam reforming （CSR） and the electrochemical catalytic reforming （ECR）, were performed for the bio-oil reforming. The catalyst with an atomic mol ratio of ni：Cu：Mg：Ce：AI=5.6：1.1：1.9：1.0：9.9 exhibited very high reforming activity both in CSR and ECR processes, reaching 82.8% hydrogen yield at 500℃ in the CSR, yield of 91.1% at 400℃ and 3.1 A in the ECR, respectively. The influences of reforming temperature and the current through the catalyst in the ECR were investigated. It was observed that the reforming and decomposition of the bio-oil were significantly enhanced by the current. The promoting effects of current on the decomposition and reforming processes of bio-oil were further studied by using the model compounds of bio- oil （acetic acid and ethanol） under 101 kPa or low pressure （0.1 Pa） through the time of flight analysis. The catalyst also shows high water gas shift activity in the range of 300-600 ℃. The catalyst features and alterations in the bio-oil reforming were characterized by the ICP, XRD, XPS and BET measurements. The mechanism of bio-oil reforming was discussed based on the study of the elemental reactions and catalyst characterizations. The research catalyst, potentially, may be a practical catalyst for high efficient production of hydrogen from reforming of bio-oil at mild-temperature.

关键词： Hydrogen generation Bio-oil ni based catalyst Mild-temperature

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hydrogen production from bio-oil using electrochemical catalytic reforming method over ni based catalyst

hydrogen production from bio-oil using electrochemical catal...

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生物质能源技术国际会议

作者： Li-xia YUAN~a,Qi ZHAI~a,Shao-bin LIN~a,Quan-xin LI~(a,*) a Department of Chemical Physics,Lab of Biomass Clean Energy,University of Science & Technology of China,Hefei, Anhui,230026,P.R.China

A high effective reforming method for the production of hydrogen from the bio-oil,generated from fast pyrolysis of biomass, was performed at much lower temperature by using electrochemical catalytic steam reforming over the conventional ni-based *** electrochemical catalytic reforming was carried out in the fixed-bed continuous flow reactor,where an ac electronic current passed through the 18%niO/AlO *** was found that the performance of the bio-oil steam reforming not only depends on the reforming temperature,but also remarkably enhanced by the current through the catalyst. During the electrochemical catalytic reforming process,it was noticed that both the hydrogen yield and the carbon conversion were largely enhanced by the current through the *** carbon conversion increased from 23.8%to 81.5%with increasing the current from 0 to 3.1 A at 450℃,and reaches 93.0%at 3.1 A and 500℃,the hydrogen yield also increased with increasing the current at various fixed reforming temperature

关键词： Hydrogen Bio-oil ni based catalyst Electrochemical catalytic reforming

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Autothermal reforming of biogas over a monolithic catalyst

引用

Journal of Natural Gas Chemistry 2010年第5期19卷 477-481页

作者： Sadao Araki Naoe Hino Takuma Mori Susumu Hikazudani Hitachi Zosen Corporation Business & Product Development HeadquartersTechnical Research Institute

This study focused on measurement of the autothermal reforming of biogas over a ni based monolithic catalyst. The effects of the steam/CH4 （S/C） ratio, O2/CH4 （O2/C） ratio and temperature were investigated. The CH4 conversions were higher under all examined temperatures than the equilibrium conversion calculated using the blank outlet temperature, because the catalyst layer was heated by the exothermic catalytic partial oxidation reaction. The CH 4conversion increased with increasing O2/C ratio. Moreover, the CH4 conversion was higher than the equilibrium conversion calculated using the blank outlet temperature for O2/C〉0.42 and reached about 100% at O2/C=0.55. However, the hydrogen concentration decreased for O2/C〉0.45 because hydrogen was combusted to steam in the presence of excess oxygen. On the other hand, the hydrogen and CO2 concentrations increased and the CO concentration decreased with increasing SIC ratio. As a result, it was found that the highest hydrogen concentrations and CH4 conversions were attained at the O2/C ratios of 0.45-0.55 and the SIC ratios of 1.5-2.5. Moreover, the H2/CO ratio could also be controlled in the range from about 2 to 3.5 to give at least 90% CH4 conversion, by regulating the O2/C or S/C ratios.

关键词： autothermal reforming biogas hydrogen production monolithic catalyst ni based catalyst

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