TiO2-assisted photo-catalysis degradation process of dye chemicals

ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｏｎｅｏｆｔｈｅｍａｉｎ ｐｏｌｌｕｔｉｏｎｓｏｕｒｃｅｓｉｎＣｈｉｎａ ,ｔｈｅｔｅｘｔｉｌｅｄｙｅｉｎｇａｎｄｆｉｎｉｓｈｉｎｇｉｎｄｕｓｔｒｙａｎｎｕａｌｌｙｃｒｅａｔｅｓ 9— 12× 10 8ｍ3ｗａｓｔｅｗａｔｅｒｗｉｔｈｈｉｇｈｏｒｇａｎｉｃｓｔｒｅｎｇｔｈａｎｄｃｏｌｏｕｒ(Ｌｉ,1999ｂ) .Ｄｙｅｓａｒｅｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｃｌａｓｓｏｆｓｙｎｔｈｅｔｉｃｏｒｇａｎｉｃｃｈｅｍｉｃａｌｓ.Ｉｎ ｇｅｎｅｒａｌ,ｃｏｎｖｅｎｔｉｏｎａｌｂｉｏｌｏｇｉｃａｌｔｒｅ…     

浅池型太阳能光催化反应动力学研究

研究了浅池型太阳能反应器中亚甲基蓝一级降解动力学常数与光辐射强度、反应器A/V值的关系 .当A/V与光照I均为变量时 ,提出了一个修正的动力学方程 :k =1 6 2 7× 10 -5I0 871(A/V) 1 3 57.同时 ,还建立了一个新的表观量子产率模型 :k =5 2 3CI0 871(A/V) 1 3 57.计算表观量子产率值为 0 17%— 0 30 % ,随着A/V、初始浓度的增大或光强的减小 ,表观量子产率增大     

光催化降解亚甲基蓝的影响因素及动力学研究

进行了亚甲基蓝在硫化镉上的暗吸附反应，并作Langmuir拟合和Freundlich拟合计算其吸附速率常数。通过实验证明硫化镉光催化降解亚甲基蓝符合一级动力学反应。在低光强下，反应速率常数随着光强的增大而增大，两者之间存在显著的线性关系。改变光催化反应温度，计算表观活化能Ea为19.13kJ/mol，证明温度对反应影响较小。     

光催化-臭氧协同处理微污染水体的研究

研究了利用光催化-臭氧协同处理微污染水体,分别考察了单一作用和协同作用、不同降解时间、pH值以及不同负载方式下的去除率。     

Homogeneous catalytic wet air oxidation for the treatment oftextile wastewaters

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｔｅｘｔｉｌｅｗａｓｔｅｗａｔｅｒｓａｒｅｏｎｅｏｆｔｈｅｍａｊｏｒｐｏｌｌｕｔｉｏｎｃｏｎｃｅｒｎｓｉｎＣｈｉｎａｗａｔｅｒｅｎｖｉｒｏｎｍｅｎｔ.Ｔｈｅｓｅｗａｓｔｅｗａｔｅｒｓａｒｅｍａｉｎｌｙｅｆｆｌｕｅｎｔｓｆｒｏｍｔｈｅｄｅｓｉｚｉｎｇ ,ｐｒｉｎｔｉｎｇａｎｄｄｙｅｉｎｇｐｒｏｃｅｓｓｅｓ.Ｔｈｅｐｏｌｌｕｔａｎｔｓｉｎｄｅｓｉｚｉｎｇｗａｓｔｅｗａｔｅｒｓｄｅｐｅｎｄｗｉｄｅｌｙｏｎｔｈｅｆｉｂｒｅｄｅｓｉｚｅｄ .Ｔｈｅｎａｔｕｒｅｆｉｂｒｅｄｅｓｉｚｉ…     

Destruction of VOCs by combination of corona discharge and catalysis techniques

The catalytic effect of alumina on the destruction of toluene, benzene, acetone and methanol, in DC pulsed corona discharge reactor was studied. In the presence of alumina the inlet concentration of the VOCs was varied from 5 x 10-6 mol/L to 80% x 10-6 mol/L, and their decomposition efficiency (conversion %) was found to be 99%-80% for toluene, 99%-97% for benzene, 95%-92% for acetone, and 72%-85% for methanol. Corresponding decomposition in the absence of alumina was 90%-38% for toluene, 89%-57% forbenzene, 42%-30% for acetone, and 47%-19% for methanol. Feed gas flow rate was 400 cm3/min and power reading from DC source was 7.4 W in all of the experiments. Alumina also shifted the CO/CO2 ratio in the by-products in favor of CO2. Ozone concentration at the reactor outlet was higher in the presence of alumina. Enhancement in VOCs decomposition by alumina was explained on the basis of higher concentration of ozone and its precursor atomic oxygen [O].Decomposition efficiency (conversion %) for individual compounds was found to be inversely proportional to the ionization potential of the compound, under identical conditions. Double DC high voltage sources pulse generator was tested and found to improve VOCs decomposition compared with the conventional single DC high voltage source.     

电-多相催化反应器处理苯胺废水的研究

提出一种基于复极性固定床反应器处理有机废水的新技术:电-多相催化技术,用于苯胺废水的处理。实验结果表明,该技术对苯胺具有较好的催化降解的效果。在外加电压30V、电解时间1h、支持电解浓度800mg/L、pH值中性的条件下,降解COD为800mg/L的苯胺废水,去除率可达36.53%,同时对不同因素的影响原因进行了分析。     

Simultaneous catalytic removal of NOx and diesel PM over La0.9 K0.1 CoO3 catalyst assisted by plasma

The simultaneous removal of NOx and particulate matter(PM) from diesel exhaust is investigated over a mixed metal oxide catalyst of La0.9 K0.1 CoO3 loaded on γ-Al2O3 spherules with the assistant of plasma. It was found that NOx was reduced by PM in oxygen rich atmosphere, the CO2 and N2 were produced in the same temperature window without considering the N2 formed by plasma decomposition. As a result, the temperature for the PM combustion decreases and the reduction efficiency of NOx to N2 increases during the plasma process, which indicated that the activity of the catalyst can be improved by plasma. The NOx is decomposed by plasma at both low temperature and high temperature. Therefore, the whole efficiency of NOx conversion is enhanced.     

生油岩与火成岩的相互作用研究初探—有机酸对火成岩的蚀变及过渡金属对有机质演化的催化作用

在发育火成岩的生油层中 ,微生物和热解作用导致生油岩有机质形成有机酸 ,这些有机酸对火山矿物中的金属元素是一种有效的溶剂和迁移介质 ,特别是能促使其中的过渡金属活化和溶解。这样造成与火成岩共存的生油岩内过渡金属含量显著增加 ,一些过渡金属是有机质成烃演化良好的催化剂。同时火山和热液活动还能向生油层提供过渡金属元素 ,从而使与火成岩共生的生油岩油气生成量大大提高。     

环境多相催化研究过程中的表面科学研究方法

简要介绍环境多相催化研究过程中应用表面科学的研究方法的必要性和将会遇到的挑战和机遇 .结合作者有关的研究事例 ,分别讨论了环境多相催化和表面科学研究领域之间材料和压力的差异所带来的问题和可能的解决方案 ,特别是催化剂原位表面表征的重要性