Why is no one talking about CO2 capture and selexol technology?
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I’m not sure whether this question should be posted here; I hope the moderator won’t delete it. Everyone discusses gasification, combustion, and the like every day. I just searched for two keywords: ‘selexol’ and ‘CO2 capture’, but the search results were zero. I’m not sure whether no one has talked about these topics or if people simply don’t consider them important enough to pay attention to I’m currently learning about *this area, so I wasn’t able to find any relevant information on the forum, which was a bit disappointing. I hope experts and technicians will provide assistance and additional insights, sharing their opinions. Thank you
Bro, just Google it in English – it’s everywhere.
The technologies for capturing CO2 are not very good at the moment; research is still underway on them
There is a considerable amount of literature on this topic; it depends on how you conduct your searches. Searching for literature can indeed be considered an art in itself
The original poster surely didn’t come across this term on the GTC website either; there’s a lot of information there, but no mature technologies yet. As for China, there’s no need to even talk about it – those who only care about GDP as a way to advance in their careers, will they pay any attention to CO2 capture?
Sinopec currently has a project aimed at using supergravity to remove carbon and thereby increase the recovery rate in third-phase oil extraction; this project is being submitted for inclusion in the 11th Five-Year Plan support programs of the Ministry of Science and Technology. A few days ago, it passed the expert review organized by us, with the experts giving it high praise :)
Selexol is a technology from abroad and is not widely used in China; the equivalent technology domestically is NHD. There are various methods for CO2 capture: before combustion, these include Selexol, low-temperature methanol washing, carbon propylene, thermal potassium alkali, activated MDEA, etc.; after combustion, methods such as MEA and DEA are used. There are also pressure swing adsorption, membrane methods, etc.
If you don’t say it, I won’t know what it means? Learned *a little knowledge!
If it can be included in foreign databases, many things can be searched
The low-temperature methanol washing technology is highly mature; it enables the simultaneous absorption of CO2 and H2S for separate removal. The CO2 can be concentrated as a product, while H2S can be used in subsequent processes to produce sulfur or sulfuric acid.
The CO2 capture unit at the Beijing Thermal Power Plant, developed by the Thermal Engineering Institute, has completed its 168-hour test period with excellent performance. It’s on CCTV now
Is there any information about that power plant upstairs? You could also explain what their methods are Is it physical absorption or chemical absorption? It’s on CCTV; can you give me a link?
The Selexol method is a foreign technology and represents one of the more advanced methods for removing acidic gases in the world today. It belongs to the category of physical absorption, using polyethylene glycol dimethyl ether as the absorption solvent, with a permissible water content of 2–5%. Desorption can be achieved through reduced-pressure flashing or stripping; the Bunsen coefficients for the dissolution of H2S and CO2 are 30.5 and 3.4 respectively, providing good selectivity. A similar technology in China is known as the NHD method; it was developed jointly by institutions such as the South China Research Institute. The solvent used is also polyethylene glycol dimethyl ether, although the carbon chain structure and composition differ slightly, the performance remains the same. Main advantages: (1) The solvent possesses excellent physicochemical properties and thermal stability. (2) It has a strong absorption capacity, and the energy consumption for decompression regeneration is low. (3) The vapor pressure is low, resulting in minimal solvent evaporation. (4) It causes no corrosion to metal equipment. (5) It has a low freezing point, allowing safe operation in winter conditions. (6) It has a certain lubricating effect on pumps and similar devices, offering excellent performance. (7) The solvent itself is biodegradable and non-toxic to humans and organisms. (8) It has the ability to dehydrate and remove organic sulfur. Main disadvantages and limitations: requires cryogenic cooling, expensive solvents with high initial investment, low specific heat of the solvents leading to significant temperature rise during the absorption process, low CO2 recovery rate, and so on. Currently, most large-scale industrial plants use the low-temperature methanol washing process.
It is described in the third issue of the 1994 magazine \"Zhong Nitrogen Fertilizer\", in the article titled \"Comparison of Several Methods for Removing Acidic Gases\".
Here is a PPT from the 2006 UKCCSC conference on CO2 capture, transport, and utilization; it has been uploaded to the file sharing area. I hope it will be useful to you. Additionally, detailed information is available on the popular free academic website Wikipedia, at the address http://en.wikipedia.org/wiki/Carbon_sequestration
I don’t know the specific link; you need to find it on your own. I have a report in Nature about CO2 capture in Beijing; send me a message to your inbox and I’ll send it to you