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
目的 分别建立肠型、弥漫型胃癌组织和血清双向凝胶电泳图谱,鉴定差异表达蛋白,从中发现有意义的胃癌肿瘤相关标志物.方法 采用双向凝胶电泳（two-dimensional polyacrylamide gel electrophoresis,2-DE）分离组织和血清总蛋白,经硝酸...目的 分别建立肠型、弥漫型胃癌组织和血清双向凝胶电泳图谱,鉴定差异表达蛋白,从中发现有意义的胃癌肿瘤相关标志物.方法 采用双向凝胶电泳（two-dimensional polyacrylamide gel electrophoresis,2-DE）分离组织和血清总蛋白,经硝酸银染色,分析选取有表达差异的蛋白质点,通过基质辅助激光解析电离飞行时间质谱（matrix-assisted laser desorption ionization time of flight mass spectrometry,MALDI-TOF-MS）鉴定差异蛋白.结果 获得重复性和分辨率较好的胃癌组织和血清双向凝胶电泳图谱,经MALDI-TOF-MS鉴定得到20种蛋白,在7例（58.3%）肠型胃癌组织中均有硒结合蛋白1（SBP1）表达,KIAA基因家族蛋白在弥漫型胃癌组织和血清中均有表达.结论 建立了弥漫型肠型胃癌组织和血清双向凝胶电泳图谱,获得了差异蛋白质点,为寻找胃癌的特异蛋白质作为胃癌肿瘤标志物奠定了基础.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.
文摘目的 分别建立肠型、弥漫型胃癌组织和血清双向凝胶电泳图谱,鉴定差异表达蛋白,从中发现有意义的胃癌肿瘤相关标志物.方法 采用双向凝胶电泳（two-dimensional polyacrylamide gel electrophoresis,2-DE）分离组织和血清总蛋白,经硝酸银染色,分析选取有表达差异的蛋白质点,通过基质辅助激光解析电离飞行时间质谱（matrix-assisted laser desorption ionization time of flight mass spectrometry,MALDI-TOF-MS）鉴定差异蛋白.结果 获得重复性和分辨率较好的胃癌组织和血清双向凝胶电泳图谱,经MALDI-TOF-MS鉴定得到20种蛋白,在7例（58.3%）肠型胃癌组织中均有硒结合蛋白1（SBP1）表达,KIAA基因家族蛋白在弥漫型胃癌组织和血清中均有表达.结论 建立了弥漫型肠型胃癌组织和血清双向凝胶电泳图谱,获得了差异蛋白质点,为寻找胃癌的特异蛋白质作为胃癌肿瘤标志物奠定了基础.
