What is the dilemma of coal to aromatics stagnation?

wallpapers Industry 2020-12-09

five years ago, Shenhua Baotou olefin project was successfully put into operation, which started the domestic coal to olefin investment boom. Relying on the huge cost advantage of coal based olefins, the annual profit of Shenhua Baotou project is calculated in billion yuan. The benchmarking role of Shenhua Baotou project has also aroused domestic capital to enter the field of coal to olefin, which eventually makes coal to olefin become the most popular chemical form of emerging coal chemical industry in China.

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however, the development of coal-based route is not smooth for aromatics, which form "triphenylene" together with olefins and provide raw materials for organic chemical industry and synthetic materials. The industrial demonstration of coal to aromatics is in stagnation after the industrial test device of methanol to aromatics in 2012. Under the current situation of

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, the oil price is going down all the way, which challenges the overall economy of coal chemical industry. The price of aromatics has also been declining, and traditional petroleum based aromatics are showing competitiveness again on the basis of low-cost raw oil. In this context, the industrialization of coal to olefins has been cast a shadow again.

despite this, industrial technology is still evolving. After Tsinghua University's methanol to aromatics technology has been verified in industrialization, the industry is also moving to further improve the technology of direct coal liquefaction to aromatics, so as to further improve energy conversion and economy.

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benefit from the domestic resource endowment and the fact that most of PX (p-xylene, aromatics main products) rely on import, so the strategic significance of coal to olefins is self-evident. Therefore, in the current adverse period, how to lay a foundation for the industrialization of coal to aromatics has become a key issue in front of the industry and the competent departments.

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pilot projects

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the 600000 tons coal to aromatics industrial project promoted by Huadian is still in steady progress. However, under the background of power generation groups withdrawing from coal chemical business, the coal to aromatics industrial project has also been cast a shadow.

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Huadian coal to aromatics industrial project is promoted by Huadian coal industry, a subsidiary of Huadian Group. According to the plan, the construction site of the project is located in Yulin City, Shaanxi Province, with a total investment of 13.3 billion yuan, and finally produces 550000 tons of p-xylene. In view of the mature technology of methanol to aromatics in Tsinghua University, the key technology is methanol to aromatics technology developed by Tsinghua University. The technology of

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was developed by Tsinghua University in 2000, and then Huadian Group entered to jointly develop coal based methanol to aromatics catalyst and complete set of industrial technology. In July 2011, a 10000 ton methanol to aromatics industrial test unit was built in Yulin and put into operation in January 2013.

"now this project has stopped. We built this project mainly to get the data. When we get the data, the task is completed." Professor Wei Fei of Tsinghua University said. Wei Fei is responsible for the development of methanol to aromatics technology in Tsinghua University. According to the plan, the industrial test device is completed, and the next step will be the construction of industrial demonstration project. Huadian Yulin 600000 tons coal to aromatics project. However, under the background of coal chemical industry launched by power generation group, the project is covered with uncertainty. Among the five power generation groups of

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, Datang Group was the first to deploy coal chemical industry. After investing a lot of money in the field of coal chemical industry, due to the lack of technology and talents, the coal chemical projects invested have become a burden to Datang Group. After that, Datang Group announced that it would withdraw from coal chemical industry and temporarily transfer its assets to Guoxin holding company under SASAC.

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along with Datang Group, Guodian and other power generation groups have gradually withdrawn from coal chemical business. Huadian Group entered the field of coal chemical industry late, continued to purchase coal resources in 2009, and began to enter coal chemical industry the next year. In July last year, Huadian signed a strategic cooperation framework agreement with Tianlong holdings and Shaanxi Yitai energy on the 1 million ton coal based aromatic hydrocarbon project in Yulin, aiming to open up the upstream and downstream of coal to aromatics project.

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were also in July last year. Chen Zongfa, director of the political and legal department of Huadian Group, said in a public speech that the coal chemical project of Huadian Group was being pushed forward cautiously. Although there were losses at present, there was no plan to divest.

an insider of Huadian coal industry said that the key to the 600000 ton coal to aromatics project is methanol to aromatics technology. The technology has undergone 10000 ton industrial test, "from 10000 tons to 600000 tons, it does not exceed the magnification of existing technology, and the risk is controllable."

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although Huadian coal industry has doubts about whether the industrial project can finally be launched. However, according to the above-mentioned insiders, "at present, we are still doing the preliminary work step by step and steadily advancing. At least up to now, our work has not been interfered with."

technology innovation

the methanol to aromatics technology developed by Tsinghua University and Huadian Group has innovated the original technical route, and has been verified by the world's first 10000 ton industrial test project. However, with the development of coal chemical industry, another idea of direct coal liquefaction to aromatics was put forward.

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in March 2013, the methanol to aromatics technology jointly developed by Tsinghua University and Huadian was appraised by the China Petroleum and Chemical Industry Federation entrusted by the state energy administration. With the aid of a 10000 ton methanol to aromatics test facility, China has entered a new stage in methanol to aromatics technology and is still in the leading position in the world.

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before this, the technology of methanol to PX from toluene and aromatics directly from methanol had been developed in China. The methanol to aromatics technology jointly developed by Tsinghua University and Huadian has completed the development of 600000 T / a methanol to aromatics process package. It is understood that the production of this technology consumes about 2.8-3 tons of methanol to produce 1 ton of mixed aromatics, and through the mature aromatics combined unit, a large amount of imported PX is finally produced.

"compared with the petroleum route, methanol to aromatics route can reduce the cost by about 20%" An insider of Huadian coal industry disclosed that the production department of methanol to aromatics route has a high proportion of aromatics mixed with xylene, and there is no impurity elements such as sulfur and nitrogen, so it is more suitable for PX production.

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have gradually attracted the attention of the industry compared with the route of coal to methanol to aromatics. The key is to rely on the domestic direct coal liquefaction technology in recent years to produce aromatics through direct coal liquefaction. Generally speaking,

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