摘要
将玉米秸秆加入Pt/TiO2的悬浊液中,在紫外光照射下实现了光催化分解水制氢速率的提升。通过SEM、XRD、FT-IR和TGA对玉米秸秆在光催化反应后的结构特征的变化进行了表征和分析讨论。通过单因素实验和正交实验研究了辐照时间、玉米秸秆颗粒浓度、秸秆颗粒粒径和催化剂浓度对氢气产率及产氢量的影响。实验结果表明:催化剂浓度和秸秆颗粒浓度对产氢的影响较大。产氢量随着催化剂浓度的增加先增后减,在催化剂浓度为4×10-3~6×10^-3g/ml时产氢量最高。当秸秆颗粒浓度大于0.5×10^-3g/ml时,产氢量随着秸秆颗粒浓度的增加出现明显的下降,而且在不同的秸秆颗粒浓度下氢气产率随着反应时间的增加呈现出不同的变化规律,而过小的秸秆颗粒粒径会产生负面的影响。
In this study, addition of corn stover to the water suspension of Pt/TiO2 significantly improved H2 evolution from water splitting under UV light. The structural characteristics of corn stover after photocatalytic reaction were characterized by SEM, XRD, FT-IR and TGA. The effects of irradiation time, corn stover particle concentration, stover particle size and catalyst concentration on hydrogen production were studied by single factor experiment and orthogonal experiment. The results show that the catalyst concentration and corn stover particle concentration have a greater impact on hydrogen production. Under the experimental conditions in this paper, the hydrogen production rate and hydrogen yield increase first and then decrease with the increase of catalyst concentration, and the catalyst concentration is 4×10^-3g/ml to 6×10^-3g/ml. The highest hydrogen yield is obtained. When the concentration of stover granules is more than 0.5×10^-3 g/ml, the hydrogen production rate decreases with the increase of stover granule concentration. And the hydrogen yield shows different patterns of change with the irradiation time in different stover granule concentration. However, too small corn stover particle size will have a negative impact of hydrogen production.
作者
周云龙
叶校源
林东尧
ZHOU Yunlong;YE Xiaoyuan;LIN Dongyao(School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2019年第7期2717-2726,共10页
CIESC Journal
基金
吉林省科技发展计划项目(20190303112SF)
关键词
催化(作用)
制氢
氢
玉米秸秆
光催化
紫外光
catalysis
hydrogen production
hydrogen
corn stover
photocatalysis
UV light
