The purification efficiency of activated carbon adsorption method is 99.2%~99.3%. For the treatment of large air volume and low concentration of organic waste gas, it is agreed that this method is the most mature and reliable technology at home and abroad, but the T art process is too long, the operation cost is high, and it is often more difficult to need a stable steam source.
In view of these problems, combined with the characteristics of this graduation design and only body requirements, the use of activated carbon fixed bed adsorption system for industrial organic waste gas purification, the selection of honeycomb activated carbon as adsorbent.The process system is compact and integrated with adsorption and desorption.A systematic reaction mechanism of KOH activation of petroleum coke was proposed, and the formation of pores and the sources of Ho, H, CH and CO in the activation process were explained.
The changes of pore structure and microcrystalline structure of activated carbon and the transformation of potassium hydroxide during activation showed that KOH first reacted with petroleum coke to transform into KCO and formed a preliminary pore structure. Meanwhile, it was proved that the newly generated potassium carbonate played an important role in the development of pore structure of activated carbon.[url=www.dxdcarbon.com/product-category/activated-carbon]activated carbon manufacturer[/url]
But directly with K;
CO, the activator, the activation of the burning loss rate is large.
However, the pore structure of activated carbon was not developed, indicating that the newly formed potassium carbonate in the pore channels was more likely to react with carbon during the activation process of potassium hydroxide, and the pore structure was further developed.
According to the standard Gibbs free energy of the reaction, K· Co;
(or K;O) direct reaction with carbon is difficult to be carried out at the activation temperature of 730℃, indicating that they react with -CH- and -CHZ - in petroleum coke and play an activation role.The elemental potassium generated from the activation reaction intercalated and activated the petroleum coke, and the specific surface area of the activated product reached 98m'g1.XRD analysis showed that there were potassium to graphite intercalated compounds in the activated product.According to the study results of activation mechanism, the mixing of additive N can improve the dispersion of alkali and the activation of additive N at high temperature to improve the activation effect.Activated carbon with a yield of 68% and a specific surface area of 2532m'g can be obtained under the conditions of alkali-coke ratio of 3:1, activation temperature of 730℃ and activation time of 30 minutes.At the same time, the amount of hydrogen produced in the activation reaction is large, reaching 38cm'g 'min', and hydrogen can be separated and purified.[url=www.dxdcarbon.com/]https://www.dxdcarbon.com/[/url] Thus, a one-step process for the preparation of activated carbon with high specific surface area was proposed.Compared with the conventional method, the process reduces the production cost, shortens the production time, saves energy, and lays a foundation for further industrial production.The prepared petroleum coke based activated carbon was used as the carrier.The catalyst supported by Ni-Mo has similar hydrodesulfurization activity with commercial catalysts. The DBT conversion rate is more than 98% at 290℃ and the catalyst has high stability.The pore size distribution of petroleum coke based activated carbon with high specific surface area is mostly between 1.0~ 2.0nm. The methane storage experiment using this sample shows that it has a high methane storage performance: at 1.4 MPa, room temperature, the mass adsorption capacity of methane is 0.112 Gg '.