催化吸收法干气制乙苯的工艺研究

在改性的β沸石催化剂上研究了催化吸收法干气制乙苯的工艺过程,考察了各工艺参数对烷基化反应的影响,并提出了适宜的工艺条件:催化剂装填体积分率20％,乙烯质量空速0.2h^(-1),液体喷淋量为4～6m^3/(m^2·h),反应压力不小于1.5MPa,反应温度为140～160℃,在此条件下,乙烯转化率不小于95％,乙苯选择性不小于93％,反应产物中基本上无二甲苯生成。

催化热解-冷原子吸收法测定土壤和沉积物中的总汞

建立催化热解-冷原子吸收法测定土壤和沉积物中总汞的方法。方法在低浓度范围(0.01-20ng)和高浓度范围(50-600ng)内线性良好,取样量为0.1g时检出限为0.1μg/kg,回收率为98%～102%,相对标准偏差小于5%。方法操作步骤少,分析时间短,准确可靠,精密度好,具有普遍适用性,易于推广使用。

试析吸收+催化氧化法在挥发性有机废气处理中的应用

本文针对挥发性有机废气处理中的吸收+催化氧化法进行了分析研究,首先,介绍了某炼油厂挥发性有机废气的来源和属性,然后,探讨了吸收+催化氧化法在挥发性有机废气治理中的应用策略,包括处理技术的选择、尾气收集系统的建设和RCO系统的设计。进而,对能耗与治理效果进行了评价,分析了吸收+催化氧化法在能源消耗方面的情况,以及其治理效果。最后,对治理后的减排量进行了分析,并得出结论:吸收+催化氧化法在挥发性有机废气处理中具有显著的能耗降低和治理效果优良的优势。

CO净化方法的研究进展

介绍包括络合吸收法、直接氧化吸收法和催化氧化吸收法在内的CO净化方法的原理,论述各种净化剂的制作工艺、优缺点和应用特点。该研究对CO净化剂的开发、选择、使用均有一定的指导意义。

利用粉煤灰制备高附加值化工产品的研究

主要研究利用吸收法从粉煤灰中制取白炭黑等的原理,工艺流程,最佳温度,酸碱配比,最佳pH,控制时间,最终实现粉煤灰的分解率达99%以上,且得到高附加值的产品:白炭黑、氢氧化铝、偏硅酸钠。

稀土节能荧光灯生产过程中含汞废气处理的实践

用催化吸附 KMnO4溶液吸收化合净化法处理稀土荧光灯生产过程中含汞废气 ,经该工艺处理 ,排放的净化气低于GB162 97 1996《大气污染物综合排放标准》

Hydrogen sulfide removal by catalytic oxidative absorption method using rotating packed bed reactor

Using catalytic oxidative absorption for H_2S removal is of great interest due to its distinct advantages. However,traditional scrubbing process faces a great limitation in the confined space. Therefore, there is an urgent demand to develop high-efficiency process intensification technology for such a system. In this article, H_2S absorption experimental research was conducted in a rotating packed bed(RPB) reactor with ferric chelate absorbent and a mixture of N_2 and H_2S, which was used to simulate natural gas. The effects of absorbent p H value, gas–liquid ratio, gravity level of RPB, absorption temperature and character of the packing on the desulfurization efficiency were investigated. The results showed that H_2S removal efficiency could reach above 99.6% under the most of the experimental condition and above 99.9% under the optimal condition. A long-time continuous experiment was conducted to investigate the stability of the whole process combining absorption and regeneration. The result showed that the process could well realize simultaneous desulfurization and absorbent regeneration, and the H_2S removal efficiency kept relatively stable in the whole duration of 72 h. It can be clearly seen that high gravity technology desulfurization process, which is simple, high-efficiency, and space intensive, has a good prospect for industrial application of H_2S removal in confined space.

催化热解-AAS测定环境水及土壤样品中的总汞

建立催化热解-AAS测定环境水及土壤样品中总汞的方法。采用DMA80型直接测汞仪测定水样及土壤中总汞含量,并采用有证标准物质验证方法的准确度、精密度。方法的线性范围为:低浓度系列0.01—0.3μg/mL,线性方程y=0.0116x+0.0012,R2=0.9997;高浓度系列0.50—4.00μg/mL,线性方程y=0.001x+0.0034,R2=0.9996,RSD为1.1%—1.3%。催化热解-AAS测定环境水及土壤样品中的总汞含量,方法简便,灵敏度高,适合环境水及土壤样品中总汞的测定。