Metal passivators
The following notes are about: Environmentally friendly and production-increasing metal passivator CH-329 for FCC (Sb and Sn free).
Environmentally friendly and production-increasing metal passivator CH-329, is a multi-functional metal passivator that can be used in catalytic cracking units, which is environmentally friendly and does not contain antimony, tin and other metals that are unfavorable to the environment.
Catalytic cracking is an important process and core device for petroleum refining and heavy raw material oil processing. Under the current market background and environmental requirements of overcapacity and increasing carbon emission reduction efforts year by year, reducing the recombinant yield of coke and oil slurry in the catalytic cracking unit and improving the yield of light components such as liquefied gas (such as chemical raw materials such as propylene) and gasoline will be improved, so as to promote the performance goals of environmental safety and friendliness, energy conservation and emission reduction, and increase production and income, which has very realistic safety, environmental protection and economic significance for the catalytic units that have been built and are in operation.
Coke is the main by-product of the catalytic cracking process, the coke of the regenerator makes the coke generate CO, CO2, H2O, SOx, NOx, etc. after combustion, and the heat generated by the combustion is mainly used for the thermal balance of the device, the preheating of the raw oil, the heat required for the reaction, and the heating of the main air, heating steam, etc. However, with the heavy and inferior quality of catalytic raw materials, the coke yield increases, and the large amount of CO2 produced by coke brings serious environmental safety problems and high energy consumption, and the energy consumption of catalyst coke regeneration accounts for about 80% of the total energy consumption of the catalytic unit. Therefore, reducing the coke yield of the catalytic unit is a very important measure to achieve the environmental safety goals of the whole plant, carbon emission reduction, and low energy consumption.
At the same time, the catalyst inactivation and poisoning of the catalytic device will lead to the decline of the operating efficiency of the device, and the causes of catalyst poisoning include: the blockage of the catalyst pores caused by coking and the poisoning of the catalyst acid center; Catalyst poisoning caused by heavy metals such as nickel, vanadium, iron, etc. in catalytic raw materials.
At present, the widely used method of slowing down catalyst poisoning and inhibiting heavy metals is to add metal passivators containing antimony, tin and other components, which have controversies such as polluting the working environment and high cost of waste catalyst treatment. Moreover, the metal passivator can only passivate some heavy metal elements such as nickel and vanadium, and cannot fully inhibit the deposition of various metal components on the surface of the catalyst, especially for the iron poisoning of the catalyst, nor can it avoid the carbon deposition and catalyst poisoning caused by coke, and the auxiliary effect on the catalytic cracking unit is limited, and it is difficult to meet and solve the environmental safety issues such as excessive coke yield, catalyst iron poisoning, and the increasing requirements of energy saving, consumption reduction, and carbon emission reduction in the catalytic cracking unit.
Environmentally friendly and production-increasing metal passivator CH-329, aims to promote the production of catalytic cracking units to achieve energy saving, emission reduction, environmental safety and friendliness, and represents the latest development direction of national new quality production.
1. CH-329 can synergize with catalysts to improve catalyst efficiency and catalytic reaction efficiency, improve the distribution of catalytic products, reduce carbon deposition and coke generation, and increase the target product yield of the catalytic cracking unit, especially the product yield of liquefied gas (such as C3 and C4 components such as propylene and butylene) and gasoline and diesel, which is conducive to the realization of environmental safety goals such as carbon emission reduction, energy saving and consumption reduction.
Environmentally friendly and production-increasing metal passivator CH-329, it can inhibit the occurrence of dehydrogenation reaction, reduce the unsaturation of gasoline and other products, and improve product stability while improving the efficiency of the catalyst.
2. Environmentally friendly and production-increasing metal passivator CH-329, it can inhibit the pollution of Fe, Ni, V, Ca, Na and other metals in the catalytic cracking raw oil, including heavy metals, to the catalyst, reduce the accumulation of various metals in the balancer, reduce the loss of the catalyst, prolong the life cycle of the catalyst, and help control and save the input cost of the device.
3. CH-329 has a comprehensive ability to passivate various metals, and the product does not contain heavy metal elements such as antimony, tin, bismuth, etc., and the catalytic cracking unit does not need to use metal passivator alone, which will not cause secondary pollution to the catalyst, so that the recovery of waste catalyst can be converted from hazardous waste to solid waste, which greatly reduces the cost of recycling and reuse of waste catalyst and the harm to the environment.
4. CH-329 can optimize the product distribution, improve the yield, reduce the coke, that is, reduce the output of nitrogen oxides at the same time, and help control the emission of NOx and SOx in the flue gas.
5. The function of CH-329 is to assist in improving the activity of the catalyst, and it has no catalytic activity, and the product does not contain unfavorable elements such as sulfur, chlorine, and nitrogen, and has no effect on the generation of SOx and NOx.
6. The main element composition of environmental protection and increased production metal passivator CH-329 is C, H and O, which are added to the raw material to inhibit and slow down the carbon deposition of the catalyst through contact with the catalyst to increase the specific surface area of the catalyst and improve the reaction efficiency, the product is added in the form of about 200ppm liquid, and does not aggregate with the dispersion of the raw material oil, and finally gradually cracks into small molecule light components.
7. Environmentally friendly and production-increasing metal passivator CH-329, is a homogeneous liquid, containing components that can improve the activity of the catalyst, which is evenly dispersed on the catalyst particles after adding the catalytic cracking raw materials, and synergistically acts with the catalyst to enhance the activity of the catalyst, inhibit the green coke, improve the yield of the target product, reduce the unsaturation of the product and improve the stability. At the same time, this liquid dispersion method can effectively avoid the agglomeration of active components on the catalyst, and is more effective for the gain of the catalyst.
8. The combination of antioxidants, polymerization inhibitors, dispersants and chain terminators and other functional components contained in CH-329, an environmentally friendly and production-enhancing metal passivator for catalytic cracking, can prevent and reduce the formation and coking of macromolecular organic polymers, promote the balance of the catalytic cracking reaction to shift to the right side, and at the same time free the adsorbed and entrapped low-molecular compounds, which can effectively improve the target product yield of the catalytic cracking unit while slowing down the formation of coke and heavy components in the catalytic cracking unit. In particular, the yield of target components such as liquefied gas C3 and C4 and gasoline and diesel fuel is improved.
9. Environmentally friendly and production-increasing metal passivator CH-329, improves the overall operating efficiency of the catalytic cracking unit by assisting in improving the catalyst activity, and does not contain unfavorable elements such as sulfur, chlorine, and nitrogen, and has no adverse effects on the unit products and downstream units.
10. CH-329 is a safe and environmentally friendly product that inhibits the pollution of catalysts by metals such as Ni, V, Fe, Ca, Na and other metals at the same time, which can effectively combat iron poisoning of catalysts, and can gradually reduce the amount of traditional metal passivators and replace them with long-term use, and does not contain toxic antimony, tin and other passivation agent components, so that the waste catalyst can be converted from hazardous waste to solid waste, and the emission and recovery cost of the waste catalyst can be improved.
11. Typical data and effect reference after using the environmental protection and stimulation metal passivator CH-329 for catalytic cracking:
reduce coke yield by 1.0-3.0%;
reduce the yield of dry gas such as hydrogen by more than 2.0%;
increase the yield of propylene, butylene, etc. by 2.0-4.0%;
increase the yield of gasoline and diesel by 3.0-5.0%;
Reduce the yield of heavy oil such as oil slurry by 1.0-2.0%;
Other beneficial effects: According to the operation status of the catalytic cracking unit and the nature of the raw materials, it includes improving the hydrogen-to-methyl ratio, reducing the fouling and coking problem of the catalytic unit, and helping to reduce the emission of SOx and NOx and meet the environmental protection standards.
This product does not contain P, S, CL and heavy metals and other elements that interfere with the activity of the catalyst, which improves the activity and selectivity of the catalyst, and has no adverse effect on the subsequent device and oil products.
The above data will vary according to the production process, raw materials, and actual working conditions of different devices.
12. Environmentally friendly and production-increasing metal passivator CH-329, can be directly added to the inlet of FCC feedstock from the feedstock oil pipeline.
Filling volume: According to the nature of the raw material and the process condition of the device, the general filling volume is 30-200 ppm, which can be optimized and adjusted in the specific use process to obtain the best input-output ratio.
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