Newcomer starts reporting --- look for Bole by the way
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I am engaged in coal gasification and have a little understanding of the process of GreatPoint Company. I hope I can explain some of your questions. The so-called heat balance does not require external heat, it just means that such a process can reduce heat loss as much as possible. The heat balance of a process is always higher than the thermal efficiency of the product obtained by a process where the heat loss exceeds 30%. I wonder if all the experts agree with my opinion. Another question, regarding the catalyst, this is no secret. Just check it in the literature. You can find dozens of reports. Could it be that many people here don’t check the literature casually?* Are you used to it? The most commonly used are alkali metals, especially Na and K salts and alkali. The earlier report on the production of natural gas from coal comes from Exxon Company. The process of Texco and Shell Company that everyone is very familiar with is also a coal gasification process, but the gasification product is synthesis gas (CO+H2), not natural gas. In the generation process with synthesis gas as the main purpose, it is necessary to try to avoid the generation of natural gas. As for the dispersion of the catalyst, it is naturally easy. Because these salts are water-soluble substances, they can be evenly dispersed on coal powder. The recovery of the catalyst is a very big problem. Whether it is K or Na, it will react with the rocks in the coal (kaolin, illite) to form insoluble KAlSiO4, etc. and be lost. Generally, the catalyst loss in the process exceeds 30%. This is also the direct factor why Exxon Company finally gave up on the process since it started coal methanation in the 1970s and 1980s. In the process of replying, many questions have been forgotten. If you have any other questions, you can send them to this site's email. In addition, I am new to the Haichuan Forum. But I don't consider myself a new chemical engineer. I hope that the forum master can give me more help, so that my points can increase faster, and I can share more experiences with everyone. I mainly do Aspen process simulation, and I have rich Aspen application experience. I hope to have more exchanges.
The author's answer is quite accurate. The one-step method has basically been completed from the perspective of process technology development. All that needs to be done now is to optimize the effectiveness of the measures to improve economic benefits and the stability of long-term operation, and to complete the construction of the demonstration project as soon as possible.
Hello, I would like to ask a question. Can you use software to simulate the process of intermittent gas generation in a fixed bed? We are not skilled in using it, and the simulation results are too bad.
Yes, the simulation results are much worse. This is not due to the software, but to the skills used. Of course, it also requires good data coordination. The data I am talking about refers to thermodynamic models and data, reaction kinetic models and data, equilibrium constants, etc. If the hydrodynamic properties can be taken into account, the simulation results will be better. I hope it can inspire your question.
I'm a little dizzy × A new one is starting to report---Looking for Bole by the way--》》Seems to be self-recommendation× The so-called heat balance does not mean that external heat is not needed, it just means that such a process can minimize heat loss. ---》》》Whose question are you answering, and which question?
Being able to accurately simulate the coal gasification process is indeed a master. The example of aspen v7 is relatively simple and of little significance.； Can you send me a copy of your case or post it on the forum? catashu@21cn.com , thank you very much! As for the dynamic model and data, some confidentiality may be involved. Please bother to modify some values! This post was last edited by shuchang on 2009-3-29 22:14 ]