Exploration And Research Green Chemisty Adsorbent

With China’s rapid economic development, the issue of environmental protection and energy efficiency issues have become increasingly prominent. Chinese covernment have proposed sustainable development and building good-oriented society and the requirements of resource-saving society. In recent years, Chinese scientific research institutions at all levels to respond positively to the government’s requirements, in terms of energy saving, environmental protection and resource efficient use.They do a lot of exploration and research, and a lot of the methods used to achieve environment-friendly society, and resource-saving societyrequirements.In these methods, adsorption separation method due to its high efficiency, environmental and simple process characteristics become an important method for the construction of environment-friendly society, and resource-saving society.In this context, the adsorbent as the core of the adsorption separation method has become a research hotspot. Adsorbent research focuses on the synthesis of new adsorbents and improved classic adsorbent synthesis process. Research focus for the adsorbent to do the work of the following two aspects:A, Improved the Synthesis of nitrogen-oxygen separation adsorbent by changing heating mode in the hydrothermal ion exchange. Examine microwave heating ion exchange mechanism through interrupt experiment.The experiment was found to improve when the temperature of the ion exchange, to increase the concentration of the ion-exchange liquid, the extension of the primary ion exchange experiment time and frequency and can improve the degree of ion-exchanged molecular sieve increase in the continuous ion exchange experiment.In the ion exchange experiment the ion exchange temperature should Choice 80℃, the concentration of ion-exchange liquid Choice 0.5mol/L is more appropriate, ion exchange time 4h, the continuous ion exchange frequency 3, in the conditions above complete the ion exchange experiments can be higher zeolite ion exchange (the ion exchanged≥90%) at the same time ensure that the degree of crystallinity of complete molecular sieve in the ion exchange experiments.At the same time,it was found that the microwave heating power, temperature in the ion exchange, increase the the chestnuts exchange concentration, to extend the ion exchange experiments time can be significantly improved ion exchanged molecular sieve, but the increase in the number of ion exchange ion exchanged molecular sieve and is not obvious. The experiment also found that ion-exchange power and heat in the microwave heating experiment, microwave power of 80W, the ion-exchange temperature to 70℃, chestnuts exchange concentration to 0.5 mol/L, an ion exchange for 15 minutes, continuous ion exchange experiments for 2 times, when zeolite ion exchange degree can reach a higher level (ion exchange degree≥90%). Interrupt the experiment investigated on the basis of the above experimental data the microwave heating ion exchange ion exchange mechanism of the experiment, found that microwave heating ion exchange experiments is a film diffusion control.B,Use of ZSM-5 zeolite adsorbent treatment with toluene as the representative of VOCs gas. investigated homemade ZSM-5 zeolite adsorption and desorption process conditions and the performance of adsorption and desorption, and commonly used MCM-22 molecular sieve adsorption and desorption performance for comparison.In comparative experiment can see the homemade ZSM-5 zeolite toluene VOCs gas adsorption and desorption performance were higher than those of MCM-22.