共搜索到505条信息，每页显示10条信息，共51页。用时：0小时0分0秒371毫秒
Effects of Light Rare Earth on Acidity and Catalytic Performance of HZSM-5 Zeolite for Catalytic Cracking of Butane to Light Olefins Duan Aijun1,Zhao Zhen1,Zhang Li1,Wang Xiaoning1,Jiang Guiyuan1,Xu Chunming1 (1.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China) Abstract:The effects of rare earth (RE) on the structure, acidity, and catalytic......
......
Effect of salinity and acidity on bioleaching activity of mesophilic and extremely thermophilic bacteria H. DEVECI1, M. A. JORDAN2, N. POWELL2, I. ALP1 1. Department of Mining Engineering... of the extreme thermophiles is found to improve in response to the increase in acidity (pH from 2.0 to 1.0) whilst the activity of the mesophiles is adversely affected by decreasing pH. Statistical analysis......
......
Effects of Light Rare Earth on Acidity and Catalytic Performance of HZSM-5 Zeolite for Catalytic Cracking of Butane to Light Olefins王晓宁,赵震,徐春明,段爱军,张莉,姜桂元摘 要:The effects of rare earth(RE)on the structure,acidity,and catalytic performance of HZSM-5 zeolite were investigated.A series of RE/HZSM-5 catalysts,containing 7.54% RE(RE=La,Ce,Pr,Nd,Sm,Eu or Gd......
氧化-控pH中和法处理南丹县吉朗铟业有限公司锌冶炼高酸含砷废水 谭永仁1,朱志勇1,陆宏标2,李旭光2,李超2,申济鼎1 (1.南丹县吉朗锢业有限公司,广西,南丹,547205;2.桂林理工大学,南宁分校,南宁,530001) 摘要:针对石灰中和法处理南丹县吉朗铟业有限公司锌冶炼过程中高酸含砷废水,存在污泥量大,污泥处理困难,有价金属流失严重,成本高等缺点,研究采用氧化-控pH中和法处理锌冶炼过程中高酸含砷废水技术.多次试验表明,该工艺简单,技术成熟可靠,具有较好的推广应用的条件. 关键词:环境工程; 高酸含砷废水; 氧化-控pH中和法; 锌冶炼; environment engineering; waste-water with high acidity and As content; oxidation-pH control neu-tralization process......
Academy of Sciences,) Abstract:The effects of exogenous La on the fertility parameters such as cation exchange capacity (CEC), exchangeable basic cations, and exchangeable acidity in red soil... influence on CEC, exchangeable Ca and Mg, and exchangeable acidity in red soil and paddy soil. [全文内容正在添加中] ......
of active center of the catalyst and the surface acidity of the catalyst, decreasing the surface carbon deposit during the reaction. Moreover, the addition of rare earth oxides influences the electronic......
较高的分解速度和深度 关键词: 氢氧化铝晶种;表面酸性;铝酸钠溶液; 中图分类号: TF111 收稿日期:2000-01-18 Surface acidity of Al (OH) 3 seed and its effect on precipitation of sodium aluminate liquors acidity......
不同浸出液酸度时,浸出液中锑,铁和砷的萃取率的变化规律,结果如图3所示. 图3 浸出液酸度对萃取的影响 Fig. 3 Effect of leachate acidity on the extractions 由图3可知,随着浸出液酸度的增加,各离子的萃取率随之上升.铁离子萃取率的增长率最大且在氢离子浓度为2 mol/L时达到平缓,锑离子萃取率在氢离子浓度为4 mol/L... microelectrolysis and flocculation process[J]. Industrial Water Treatment, 2011, 31(5): 31-34. Recover process of antimony from antimony-bearing complex solution with high acidity by extraction TIAN......
