Oxidative Capture of SOx and NOx by Activated Carbon Fiber

活性炭纤维氧化捕集SOx和NOx

基本信息

批准号：
07044161
负责人：
MOCHIDA Isao
金额：
$ 2.3万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Application particular to ACF now under development is removal of SOx and NOx in the atmosphere as well as flue gas. The basic principle of SOx removal is capture of SO_2 in the form of H_2SO_4. Continuous recovery of conc.aq.H_2SO_4 is now pursued. Removal of NOx relies basically on the reduction to N_2 with NH_3 or oxidation to NO_2 to be trapped by aq.bases. The inhibition of humidity in the atmosphere at ambient temperature is a problem. The hydrophobic properties of ACF can be compatible with its oxidation activity by selecting the precursor activation extent, and post heat-treatment.Acid rain is one of the most concerned problems for the global environment. Application of ACF to solve this problem is expected.The authers had found that ACF with larger amount of nitrogen content showed higher catalytic activity for dehydrochlorination of 1,2-dichloroethane into vinyl chloride at around 360ﾟC.It was suggested that pyridinic nitrogen included in the ACF worked as lewis base. Surface investigation by XPS provided one proof that pyridinic nitrogen worked as active site. For the aim of improvement of catalytic performances, pyridine CVD on the surface of pitch based ACF had examined by same way of benzene CVD as mentioned before. It was found that nitrogen content increased and catalytic activity raised. Pich based ACF showed low catalytic activity and short life time. On the other hand, the ACF of 8 wt% weight gain showed higher catalytic activity and long life time. The ACF of 16 wt% weight gain showed more higher initial activity, but resulted in shorter life time than the ACF of 8 wt% weight gain. These results propose a new method of surface modification of carbon materials to create active sites.

现在正在开发的ACF的应用是在大气以及烟气中清除Sox和NOX。 SOX删除的基本原理是以H_2SO_4的形式捕获SO_2。现在正在追求conc.aq.h_2so_4的连续恢复。 NOX的去除基本上取决于用NH_3的减少到N_2或氧化为No_2被aq.bases捕获的NO_2。在环境温度下大气中湿度的抑制是一个问题。 ACF的疏水性能与其氧化活性可以通过选择前体激活范围兼容其氧化活性，并在热处理后。酸雨是全球环境中最关心的问题之一。预计将应用ACF解决这一问题。用户发现，氮含量较大的ACF显示出较高的催化活性，可在360年左右的360°C中将1,2-二氯乙烷脱氢氯化为乙烯基氯化物。 XPS的表面研究提供了一个证据，证明吡啶固醇作为活性部位。为了改善催化性能，基于音高ACF表面的吡啶CVD通过以前提到的苯CVD进行了相同的方式检查。发现氮含量增加和催化活性。基于PICH的ACF显示出低催化活性和寿命短。另一方面，体重增加8 wt％的ACF显示出更高的催化活性和寿命长。体重增加16 wt％的ACF显示出更高的初始活性，但寿命短于8 wt％体重增加的ACF。这些结果提出了一种新的碳材料表面修饰方法，以创建活跃位点。