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Reporter Hou Lin Feng Jinjin Correspondent Niu Yanchun nbsp; Wang Yongjun
On April 14, 2022, employees in the gas joint workshop of the Second Fertilizer Plant were regulating the 4,000 cubic meter carbon dioxide spherical tank to achieve optimal working condition . Photo by Cao Yeqi
html On August 29, Sinopec announced that my country’s largest carbon capture utilization and storage full industry chain demonstration base and the country’s first million-ton CCUS project - " Qilu Petrochemical - Shengli Oilfield Hundred The official gas injection operation of "10,000-ton CCUS Project" marks that my country's CCUS industry has entered the middle and late stage of technology demonstration - mature commercial operation.CCUS refers to the technology that captures carbon dioxide from industry or other carbon emission sources and transports it to a specific location for utilization or storage. It has the characteristics of large-scale emission reduction and obvious emission reduction benefits. It is vividly called "carbon catcher". The Qilu Petrochemical-Shengli Oilfield CCUS project is the largest CCUS full industry chain demonstration base and benchmark project in China. It is of great significance to building an "artificial carbon cycle" model and can effectively help my country's " carbon peak " in 2030 and "" in 2060. Carbon neutral " goal achieved.
CCUS project carbon dioxide loading platform. Photo by Chen Yongfang
"Carbon Reduction" and "Carbon Reduction" Go in Two Directions
Qilu Petrochemical-Shengli Oilfield CCUS Project consists of Qilu Petrochemical Carbon Dioxide Capture and Shengli Oilfield Carbon Dioxide Flooding and Storage. These two parts are exactly what "carbon reduction" means. ” and “Seeking Carbon” hit it off.
Due to the characteristics of their products, chemical companies have become large carbon emitters. Even after improving processes and optimizing the energy structure, they still need to consume a large amount of fossil energy and produce rigid emissions of carbon dioxide. Shengli Oilfield uses the principle that supercritical carbon dioxide is easily miscible with crude oil to inject carbon dioxide into oil wells to increase the fluidity of crude oil, displace crude oil in micropores, and significantly increase oil recovery.
"We compare CCUS to 'eating' carbon dioxide and 'spitting' out oil." Li Haiqiang, manager of the Second Fertilizer Plant of Qilu Petrochemical, told reporters that CCUS is one of the key technologies for reducing carbon dioxide emissions. It can reduce carbon dioxide emissions during the production process. Capturing and purifying carbon dioxide and putting it into new production processes for reuse and storage can directly reduce carbon dioxide emissions.
The carbon dioxide tail gas emitted by the coal gasification unit of Qilu Petrochemical's Second Fertilizer Plant is a high-quality carbon dioxide resource with large emissions and a purity of up to 90%. In the carbon capture process, Qilu Petrochemical has determined a liquefaction and purification technology plan, using a large number of energy-saving technologies such as waste heat recovery and residual pressure recovery to recover carbon dioxide in the exhaust gas of the coal gasification unit, achieving cascade utilization and effective recovery of energy, and improving energy utilization. efficiency, reducing "secondary carbon emissions" during operation.
Shengli Oilfield will use the annual output of 1 million tons of carbon dioxide in oil recovery, which can achieve an increase of 2.965 million tons of oil in the next 15 years. At the same time, the carbon dioxide will be stored underground through oil and gas replacement, dissolution and mineralization, truly achieving "transformation". Turn waste into treasure.”
The site of the carbon dioxide recovery device of Qilu Petrochemical. Photo by Gu Bo
A benchmark project that brings together the power of China’s manufacturing industry
The comprehensive utilization of carbon dioxide is conducive to greenhouse gas emission reduction and environmental protection, and is an important measure to reduce the impact of greenhouse gases on the environment. The United Nations Intergovernmental Panel on Climate Change pointed out that CCUS is an important technical support to ensure the realization of the climate goals of the " Paris Agreement ", and most climate models require it to achieve deep emission reduction goals.
In order to effectively help my country achieve its "carbon peak" and "carbon neutrality" goals in 2060, on July 5, 2021, Sinopec announced the start of the construction of my country's first million-ton CCUS project - Qilu Petrochemical-Shengli Oilfield CCUS project.
When the project is advancing in an orderly manner, on October 24, 2021, the country issued the "Opinions of the Central Committee of the Communist Party of China and the State Council on the Complete, Accurate and Comprehensive Implementation of the New Development Concept Doing a Good Job in Carbon Peaking and Carbon Neutrality", which listed CCUS as a realization for the first time. It is an important technical means for the "double carbon" goal, and it is clearly proposed to "promote the research and development, demonstration and industrial application of large-scale carbon capture, utilization and storage technology."
In the following months, the ancient fertilizer granulation tower of the Second Fertilizer Plant of Qilu Petrochemical witnessed the "tough battle" of project construction that competed with time.
On December 9, 2021, Qilu Petrochemical Materials and Equipment Center Planning Control Ke Liang Shidong went to Shenyang Blower Group Co., Ltd. to handle matters related to the pre-factory acceptance and delivery of the CCUS project core equipment compressor group; on the evening of December 15, 2021 At 11:50, after more than 10 hours and more than 1,000 kilometers of travel, the core compressor unit of the CCUS project successfully arrived at the construction site. construction site, more than a month ahead of schedule; on December 26, 2021, with the arrival of the propylene compressor unit manufactured by Chongqing General Industry (Group) Co., Ltd., all core equipment of the CCUS project arrived at the site...
On January 29, 2022, the Qilu Petrochemical-Shengli Oilfield CCUS project was fully completed in just 96 days, achieving the goal from construction to intermediate handover, setting a new Qilu speed. The localization rate of CCUS project equipment has reached 100%, fully integrating the power of Chinese manufacturing.
As night fell, the loading site was busy. Vehicles filled with liquid carbon dioxide left the factory one after another and were transported to Shengli Oilfield. Photo by Cao Yeqi
The "Qilu Path" to achieve the goal of "carbon neutrality"
After the Qilu Petrochemical-Shengli Oilfield CCUS project was completed and handed over, Qilu Petrochemical accelerated preparations for the start of construction, established an expert driving team, and repeatedly docked the process flow with compressor manufacturers. Educate possible problems that may arise during the driving process, and formulate corresponding protective measures to ensure that the device is affordable, stable, long-term, and efficient.
On April 1, 2022, the project started trial production and started production; on April 3, the entire process was completed and qualified carbon dioxide products were produced, marking the success of the trial production. The waste gas from the production process has truly become a new resource and a new profit growth point for the petrochemical industry. After the
project was put into operation, the liquid carbon dioxide captured by Qilu Petrochemical was transported by road to Shengli Oilfield for oil displacement. In order to do a good job in product loading and unloading, Qilu Petrochemical and Shengli Oilfield discussed and docked matters such as daily product output, tank capacity and loading conditions in detail, and equipped multiple vehicles to meet the transportation needs of the CCUS project.
However, vehicle transportation of carbon dioxide has the characteristics of high cost and small capacity. According to estimates by Lu Guangzhong, a senior expert at Shengli Oilfield, currently it costs 0.8 yuan to 1 yuan to transport 1 ton of carbon dioxide per kilometer through tanker transportation. Using pipeline transportation, the cost can be reduced by at least half.
Wang Yuliang, general manager of Sinopec Qilu Petrochemical Company, said: "The CCUS project jointly owned by Sinopec Group, Qilu Petrochemical and Shengli Oilfield has natural advantages. According to Sinopec's unified deployment, carbon dioxide transportation from Qilu Petrochemical to Shengli Oilfield will be launched as soon as possible. pipeline to further reduce transportation costs and create a replicable and pushable Guangdong CCUS full industry chain demonstration base and benchmark project. "
According to Chinese Academy of Engineering forecast, China's primary energy consumption will reach 5.57 billion tons of standard coal in 2060, of which fossil energy consumption will account for approximately 26.8%, and will generate 2.71 billion tons. tons of CO2 emissions from . After offsetting 1.6 billion to 1.9 billion tons through forests, grasslands, wetlands, etc., there is still a gap of about 1 billion tons. If China wants to achieve carbon neutrality in 2060, artificial carbon reduction and carbon sequestration technology represented by CCUS is the most likely candidate.
Han Feng, deputy chief engineer of Sinopec Group and representative of Qilu Branch and secretary of the Party Committee, said: "Qilu Petrochemical-Shengli Oilfield CCUS project is known as an 'industrial forest' and is firmly in the C position in achieving the goal of 'carbon neutrality'. After being put into operation, it can reduce carbon dioxide emissions by 1 million tons per year, which is equivalent to By planting nearly 9 million trees and shutting down nearly 600,000 economical cars for one year, we can effectively promote the cleanliness of fossil energy, the scale-up of clean energy, and the low-carbon production process, forming a 'Qilu experience' that can be replicated and promoted. "
operators at the CCUS project site. Photo by Zhu Zuoqing
