AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Imsl 7 0 license cracking1/4/2023 ![]() ![]() It is obvious that thermodynamics favor the generation of higher olefins when the total pressure is increased. On the other hand, the influence of pressure on the olefin distribution is depicted in Figure 2a for a characteristic cracking temperature of 650 K. During the conversion of methanol to DME and water, the number of moles remains constant, which is why a change in pressure does not effect the equilibrium. ![]() ![]() For an MTO feed, the equimolar fraction of DME and water decreases when the temperature is raised. ![]() Finally, some general as well as reaction-specific recommendations for future work on modeling of complex reaction networks are given.Ī shows a clear trend towards lower olefins at high temperatures. Despite ZSM-5 being the most widely used catalyst for these processes, other catalysts such as SAPO-34, SAPO-18 and ZSM-23 are also discussed here. Furthermore, the modeling methodology is shown both lumped and microkinetic approaches can be found. After a presentation of the underlying chemistry and thermodynamics, the models are compared in terms of catalysts, reaction setups and operating conditions. This review analyzes different deterministic kinetic models published in the literature since 2000. Kinetic modeling of these processes is a helpful tool in understanding the reactivity and finding optimum operating points however, it is also challenging because reaction networks for hydrocarbon interconversion are rather complex. Here, the undesired higher olefins can be catalytically converted and, for methanol, the possibility of a green synthesis route exists. In this context, catalytic olefin cracking and methanol-to-olefins (MTO) gain in importance. Furthermore, less energy consumption, more flexibility in feed and a higher influence on the product distribution are necessary. The increasing demand for lower olefins requires new production routes besides steam cracking and fluid catalytic cracking (FCC). ![]()
0 Comments
Read More
Leave a Reply. |