Start up of the hottest methane direct production

2022-08-02
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The natural gas with rich reserves and low price can be directly converted into ethylene, the world's largest chemical basic raw material. Recently, Siluria Technology Co., Ltd. of the United States held a grand start-up ceremony for its pilot plant in Texas, which became the first enterprise in the world to realize the direct industrialization of natural gas into ethylene on a large scale. The new route may bring major changes to the traditional ethylene industry with oil as raw material

as a basic industrial raw material, ethylene plays an important role in the petrochemical industry. Ethylene output is one of the important symbols to measure the development level of a country's petrochemical industry. In addition to North America and the Middle East, most countries in the world, including China, especially in testing the maximum load value, we must know that naphtha is used as raw material to produce ethylene by steam cracking. This method not only consumes high energy, emits many greenhouse gases and costs high, but also needs to occupy valuable oil resources because the raw materials come from oil

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in order to reduce oil dependence, countries have carried out research on the production of olefins from natural gas with methane as the main component. There are two ways to produce ethylene from natural gas: direct method and indirect method. Compared with the tedious process of indirect method, direct method can convert methane into ethylene in only one step, which has high economic value and is very attractive

however, the selective activation and directional conversion of methane is a world-class problem, which is known as the "Holy Grail" of the entire chemical community. Therefore, from the 1980s to the beginning of this century, the academic community has not been able to develop an industrially feasible process for direct production of ethylene from methane

The key to the breakthrough lies in the catalyst. In 2010, silon February 22, 2012, RIA creatively used biological templates to accurately synthesize nanowire catalysts, used high-throughput technology to select the most appropriate element composition from a large number of alternative catalysts, and developed an industrially feasible catalyst for directly preparing ethylene from methane

the catalyst can efficiently catalyze the conversion of methane to ethylene at 5 ~ 10 atmospheres under the operating temperature of 200 ℃ ~ 300 ℃ lower than that of the traditional steam cracking method, and its activity is more than 100 times that of the traditional catalyst

the reactor designed by Siluria company is divided into two parts. One part is used to convert methane into ethylene and ethane, and the other part is used to crack by-product ethane into ethylene. The heat required for cracking reaction comes from the heat released from methane conversion reaction. This design enables the reactor to be fed with natural gas, which can also make up for the gap that there is no relevant national standard and industrial standard in China. The energy is ethane, and the energy is saved to the greatest extent

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