Ni/TiO_(2) catalyst is widely employed for photo-driven DRM reaction while the influence of crystal structure of TiO_(2) remains unclear.In this work,the rutile/anatase ratio in supports was successfully controlled by...Ni/TiO_(2) catalyst is widely employed for photo-driven DRM reaction while the influence of crystal structure of TiO_(2) remains unclear.In this work,the rutile/anatase ratio in supports was successfully controlled by varying the calcination temperature of anatase-TiO_(2).Structural characterizations revealed that a distinct TiO_(x) coating on the Ni nanoparticles(NPs)was evident for Ni/TiO_(2)-700 catalyst due to strong metal-support interaction.It is observed that the TiOx overlayer gradually disappeared as the ratio of rutile/anatase increased,thereby enhancing the exposure of Ni active sites.The exposed Ni sites enhanced visible light absorption and boosted the dissociation capability of CH4,which led to the much elevated catalytic activity for Ni/TiO_(2)-950 in which rutile dominated.Therefore,the catalytic activity of solar-driven DRM reaction was significantly influenced by the rutile/anatase ratio.Ni/TiO_(2)-950,characterized by a predominant rutile phase,exhibited the highest DRM reactivity,with remarkable H_(2) and CO production rates reaching as high as 87.4 and 220.2 mmol/(g·h),respectively.These rates were approximately 257 and 130 times higher,respectively,compared to those obtained on Ni/TiO_(2)-700 with anatase.This study suggests that the optimization of crystal structure of TiO_(2) support can effectively enhance the performance of photothermal DRM reaction.展开更多
采用芬顿高级氧化法对电石法PVC聚合釜洗釜废水进行了小试试验。结果表明:在pH值为3.5,反应时间为60 min,H 2 O 2∶COD(质量比)=1∶1,H 2 O 2∶Fe 2+(摩尔比)=3∶1的试验条件下,并兼顾COD去除率及运行成本的情况下,处理后的废水生物毒...采用芬顿高级氧化法对电石法PVC聚合釜洗釜废水进行了小试试验。结果表明:在pH值为3.5,反应时间为60 min,H 2 O 2∶COD(质量比)=1∶1,H 2 O 2∶Fe 2+(摩尔比)=3∶1的试验条件下,并兼顾COD去除率及运行成本的情况下,处理后的废水生物毒性得到大幅度降低,可生化性得到显著提升。后续采用以生化为主并引入其他保障处理工艺,最终出水COD可稳定在30 mg/L以下,各项指标满足厂内循环水冷却水回用要求。展开更多
基金The project was supported by the National Key R&D Program of China(2021YFF0500702)Natural Science Foundation of Shanghai(22JC1404200)+3 种基金Program of Shanghai Academic/Technology Research Leader(20XD1404000)Natural Science Foundation of China(U22B20136,22293023)Science and Technology Major Project of Inner Mongolia(2021ZD0042)the Youth Innovation Promotion Association of CAS。
文摘Ni/TiO_(2) catalyst is widely employed for photo-driven DRM reaction while the influence of crystal structure of TiO_(2) remains unclear.In this work,the rutile/anatase ratio in supports was successfully controlled by varying the calcination temperature of anatase-TiO_(2).Structural characterizations revealed that a distinct TiO_(x) coating on the Ni nanoparticles(NPs)was evident for Ni/TiO_(2)-700 catalyst due to strong metal-support interaction.It is observed that the TiOx overlayer gradually disappeared as the ratio of rutile/anatase increased,thereby enhancing the exposure of Ni active sites.The exposed Ni sites enhanced visible light absorption and boosted the dissociation capability of CH4,which led to the much elevated catalytic activity for Ni/TiO_(2)-950 in which rutile dominated.Therefore,the catalytic activity of solar-driven DRM reaction was significantly influenced by the rutile/anatase ratio.Ni/TiO_(2)-950,characterized by a predominant rutile phase,exhibited the highest DRM reactivity,with remarkable H_(2) and CO production rates reaching as high as 87.4 and 220.2 mmol/(g·h),respectively.These rates were approximately 257 and 130 times higher,respectively,compared to those obtained on Ni/TiO_(2)-700 with anatase.This study suggests that the optimization of crystal structure of TiO_(2) support can effectively enhance the performance of photothermal DRM reaction.
文摘采用芬顿高级氧化法对电石法PVC聚合釜洗釜废水进行了小试试验。结果表明:在pH值为3.5,反应时间为60 min,H 2 O 2∶COD(质量比)=1∶1,H 2 O 2∶Fe 2+(摩尔比)=3∶1的试验条件下,并兼顾COD去除率及运行成本的情况下,处理后的废水生物毒性得到大幅度降低,可生化性得到显著提升。后续采用以生化为主并引入其他保障处理工艺,最终出水COD可稳定在30 mg/L以下,各项指标满足厂内循环水冷却水回用要求。
