Aqueous-phase reforming(APR)is an attractive process to produce bio-based hydrogen from waste biomass streams,during which the catalyst stability is often challenged due to the harsh reaction conditions.In this work,t...Aqueous-phase reforming(APR)is an attractive process to produce bio-based hydrogen from waste biomass streams,during which the catalyst stability is often challenged due to the harsh reaction conditions.In this work,three Pt-based catalysts supported on C,AlO(OH),and ZrO_(2)were investigated for the APR of hydroxyacetone solution in afixed bed reactor at 225℃and 35 bar.Among them,the Pt/C catalyst showed the highest turnover frequency for H_(2)production(TOF of 8.9 molH_(2)molPt^(-1)min^(-1))and the longest catalyst stability.Over the AlO(OH)and ZrO_(2)supported Pt catalysts,the side reactions consuming H_(2),formation of coke,and Pt sintering result in a low H_(2)production and the fast catalyst deactivation.The proposed reaction pathways suggest that a promising APR catalyst should reform all oxygenates in the aqueous phase,minimize the hydrogenation of the oxygenates,maximize the WGS reaction,and inhibit the condensation and coking reactions for maximizing the hydrogen yield and a stable catalytic performance.展开更多
在塔里木油田测试作业中,出现诸如封隔器胶筒高温碳化失封、“O”密封圈气爆破损渗漏、高压差失封等问题,无法安全优质地完成超深超高压高温气井的测试需要。为提升井下测试工具耐温耐压性能,基于塔里木油田“十三五”以来超深高温高压...在塔里木油田测试作业中,出现诸如封隔器胶筒高温碳化失封、“O”密封圈气爆破损渗漏、高压差失封等问题,无法安全优质地完成超深超高压高温气井的测试需要。为提升井下测试工具耐温耐压性能,基于塔里木油田“十三五”以来超深高温高压井APR测试实践,总结分析了常规高温高压井测试APR测试工具存在的问题,通过提升密封部件材料的耐温等级、优化密封组合形式、改进封隔器胶筒结构等手段,将APR测试工具的耐温耐压差性能由70 MPa/177℃提升至105 MPa/204℃。经室内高温高压评价实验,封隔器设计等级、耐温耐压等关键指标满足设计要求。现场DB×井使用改进型193.675 mm CHAMP-Ⅳ封隔器、MJ×井使用改进型127 mm RTTS封隔器,作业期间井下工具工作正常,测试均取得成功,起出检查测试工具完好。改进的APR测试工具为超深高温高压井高质量勘探开发打下了坚实的基础。展开更多
基金support from European Union Seventh Frame-work Programme(FP7/2007-2013 project SusFuelCat,grant No.310490)is acknowledged.
文摘Aqueous-phase reforming(APR)is an attractive process to produce bio-based hydrogen from waste biomass streams,during which the catalyst stability is often challenged due to the harsh reaction conditions.In this work,three Pt-based catalysts supported on C,AlO(OH),and ZrO_(2)were investigated for the APR of hydroxyacetone solution in afixed bed reactor at 225℃and 35 bar.Among them,the Pt/C catalyst showed the highest turnover frequency for H_(2)production(TOF of 8.9 molH_(2)molPt^(-1)min^(-1))and the longest catalyst stability.Over the AlO(OH)and ZrO_(2)supported Pt catalysts,the side reactions consuming H_(2),formation of coke,and Pt sintering result in a low H_(2)production and the fast catalyst deactivation.The proposed reaction pathways suggest that a promising APR catalyst should reform all oxygenates in the aqueous phase,minimize the hydrogenation of the oxygenates,maximize the WGS reaction,and inhibit the condensation and coking reactions for maximizing the hydrogen yield and a stable catalytic performance.
文摘在塔里木油田测试作业中,出现诸如封隔器胶筒高温碳化失封、“O”密封圈气爆破损渗漏、高压差失封等问题,无法安全优质地完成超深超高压高温气井的测试需要。为提升井下测试工具耐温耐压性能,基于塔里木油田“十三五”以来超深高温高压井APR测试实践,总结分析了常规高温高压井测试APR测试工具存在的问题,通过提升密封部件材料的耐温等级、优化密封组合形式、改进封隔器胶筒结构等手段,将APR测试工具的耐温耐压差性能由70 MPa/177℃提升至105 MPa/204℃。经室内高温高压评价实验,封隔器设计等级、耐温耐压等关键指标满足设计要求。现场DB×井使用改进型193.675 mm CHAMP-Ⅳ封隔器、MJ×井使用改进型127 mm RTTS封隔器,作业期间井下工具工作正常,测试均取得成功,起出检查测试工具完好。改进的APR测试工具为超深高温高压井高质量勘探开发打下了坚实的基础。
