【Ten Years of Great Progress in Chemical Technology】The high-pressure controlled heat transfer methanation technology for converting methanol off-gases into natural gas was approved between 2017 and 2020

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This post was last edited by Desert Fish on 2023-10-7 at 13:36. Looking back at the decade-long development of chemical technology, let’s celebrate the prosperity and strength of modern China. This is just a starting point; more participation will make the discussion more lively. Haimen becomes even better with you here. [A Decade of Progress in Chemical Equipment] – An ongoing summary thread; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html. Enhance quality awareness and promote high-quality development. ----------------------------------------- On November 7, 2018, the China Petroleum and Chemical Industry Federation organized experts in Beijing to hold an evaluation meeting for the scientific and technological achievement of “high-pressure controllable heat-transfer methanation technology”, which was developed jointly by Qingdao Lianxin Catalytic Materials Co., Ltd., Hebi Baofa Energy Technology Co., Ltd., China University of Petroleum (Beijing), and Hangzhou Linda Chemical Technology Engineering Co., Ltd. Nine experts on the evaluation committee, led by Academician Jin Yong from Tsinghua University, believe that this technology features the following innovations: First, by using a new type of composite material and a special catalyst preparation method, the QJWH-01 methaneation catalyst with a high porosity fraction was developed. It has withstood variations in pressure and temperature as well as multiple start-up and shutdown cycles, and exhibits advantages such as good activity at low temperatures, high selectivity, excellent resistance to carbon deposition, and high activity stability. Secondly, a high-pressure controllable heat-transfer methanation process was developed, which has been applied to hydrogen-rich feed gases with a CO+CO2 content of no more than 15%. In this process, the feed gas passes through the methanation reactor once; there is no recycle gas compressor, and no steam needs to be added. It offers advantages such as fewer equipment units, lower energy consumption, a simpler process flow, and reduced investment costs. Thirdly, a new type of methanation reactor was developed to complement the aforementioned process; it features a coiled-tube heat exchange internal component that provides strong heat transfer capacity, meeting the requirements of the highly exothermic methanation process. The evaluation committee unanimously agreed that this technology has generally reached the international advanced level. Using this technology, a methanation industrial demonstration plant at Hebi Baofa Energy Technology Co., Ltd. was built, with a maximum processing capacity of 4000 Nm3/h for methanol off-gases (Figure-2). The device was completed on November 20, 2017, and started up successfully on the first attempt. From October 28 to 31, 2018, the China Petroleum and Chemical Industry Federation organized an on-site evaluation team to visit Hebi Baofa Energy Technology Co., Ltd. to conduct a 72-hour continuous operation test of the industrial demonstration unit for high-pressure controlled heat-transfer methanation (Figure 3). The results of this on-site evaluation showed that the CO conversion rate was 99.99% and the CO2 conversion rate was 96.85%, both of which met the design specifications. Recently, as some areas in our country have stepped up efforts to improve foggy weather conditions and enhance urban air quality, the demand for clean energy in the form of natural gas has increased rapidly. At present, China’s natural gas industry is in its early stages of development, and its current supply capacity is far from sufficient to meet the huge market demand; there is an urgent need to develop diversified supply channels. The industries related to methanol, coke oven gas, and synthetic ammonia are relatively mature, and a trend of overcapacity is becoming increasingly apparent. By utilizing idle production capacity or waste gases to produce natural gas, it is possible to address the issue of overcapacity, reduce waste gas emissions, and at the same time increase the supply of natural gas, thereby improving the economic performance of enterprises in these industries – an approach that offers multiple benefits. In addition to using methanol off-gas to produce natural gas, this technology can also be employed to generate natural gas from coke oven gas and low-temperature coal pyrolysis gas, offering a new technical approach for the diversified supply of natural gas.