As a crucial step in carbon capture, utilization and storage (CCUS) technology, pipeline transportation is a primary method for the large-scale transport of CO?. Due to various complex factors, supercritical CO? pipelines may face risks of leakage or rupture during operation. To address the potential gas-liquid two-phase flow during the decompression of supercritical CO? pipelines, a zero-dimensional CO? pipeline decompression model was established to investigate the multiphase flow characteristics of the internal medium during leakage. The study found that for supercritical CO? pipeline leakage, there exists a critical operating pressure; when the pipeline operating pressure exceeds this critical pressure, gas-liquid two-phase flow may occur during the leakage process.

Polymeric materials are widely used in the petrochemical industry and infrastructure sector due to their excellent performance and low cost. However, under certain utilization conditions, these materials are prone to aging, manifesting as structural fracture and performance degradation, which consequently shortens their service life. This paper takes polyethylene as a representative example to review the oxidative degradation mechanisms of polymers, and analyzes how aging-induced changes, such as chain scission and crystallinity changes, affect the performance of PE. On this basis, the study further discusses major recycling pathways for polymers, with a focus on comparing the characteristics and challenges of PE recycling via physical processing, pyrolysis, hydrogenolysis, and oxidative degradation. These findings may provide theoretical support for the green development and circular utilization of polymers, and contribute to the sustainable advancement of the polymer industry.

With the widespread adoption of variable-frequency speed regulation technology, drives are extensively used in the petrochemical industry and have become a core piece of equipment for energy-saving upgrades and intelligent transformation in this sector. However, various faults are prone to occur during actual operation, leading to economic losses and even casualties. Therefore, it is essential to conduct in-depth research on fault diagnosis methods for drives. As a leading enterprise in the drive industry, Danfoss is committed to applying artificial intelligence methods for drive fault diagnosis research. For the first time, experiments on fan fouling faults in drives were conducted, and a Support Vector Machine-based fault diagnosis model was constructed. The diagnostic results show that the model significantly improves the accuracy of diagnosing fan fouling faults.

The HSE risk checklist for the construction phase of an EPC project is an important process management document for project HSE management. The quality of the risk checklist is crucial to the effectiveness of risk management. It requires the cooperation of the construction contractor, construction management department of the EPC party and the HSE management department of the EPC party to complete the preparation and dynamic update timely and integrate the control measures in the risk checklist with the construction management process. The risk checklist is made a vital reminder and guidance for the implementation of HSE responsibilities in construction management. And by identifying and eliminating hidden hazards in real time, the control measures outlined in the risk checklist are fully implemented to achieve acceptable HSE risk levels throughout the project construction process.

Petrochemical engineering is characterized by inherently high risks associated with materials, complex and demanding process conditions, numerous potential leakage sources with complex causes and extensive consequences of potential accidents. As a typical high-risk engineering category, rigorous identification and control of safety hazards are imperative to ensure stable and efficient project operation. Accordingly, this paper begins by analyzing the primary categories of safety risks inherent in such projects. It then focuses on dissecting and systematizing the key methodologies for identifying and assessing these safety risks. Finally, the paper puts forward highly targeted and systematic prevention and control strategies along with countermeasures specifically designed to mitigate the safety risks encountered in such projects.

With the further development of socio-economic level, the increasing demand for energy has put enormous pressure on environmental protection. Thus traditional fossil fuels are gradually shifting towards the development and utilization of new energy resources. Energy security has a significant bearing on the long-term stability and prosperity of a nation, making the safety of energy engineering projects all the more crucial. In recent years, major oilfields have accelerated the development and construction of new energy projects. The current direction of energy development prioritizes new energy sources, and it is imperative to strengthen safety management and control of new energy projects to meet the demands of contemporary development. The construction of new energy projects differs greatly from that of traditional energy projects, and new methods are required for their safety management. This, in turn, requires management innovations that keep pace with the times to ensure the safety of new energy project construction, thereby promoting the stable development of such projects.

This paper conducts an in-depth analysis of the latent static risks associated with long-term shut-in wells in old oil production plants, the dynamic volatility risks of underperforming wells, the systematic aging risks of equipment and facilities and the inherent vulnerabilities at the management execution level. By comprehensively applying on-site investigation, data analysis and case diagnosis methods, a safety control system suitable for oil production wells in mature oilfields is developed. The application results show that this series of measures have significantly enhanced the well control safety level and risk prevention and control capabilities of the oil production plants, providing a practical path with reference value for the safety management upgrade of similar mature oilfields.

This paper analyzes and studies the current carbon emission status, challenges in energy conservation/carbon reduction and vulnerabilities at petroleum depots and gas stations of petroleum sales enterprises. Focusing on two major obstacles to decarbonization — purchased electricity and LNG gas evaporation loss at refueling stations — it leverages the deep application of AI tools in data processing, process optimization and strategic decision-making. The paper proposes the establishment of an AI carbon reduction technology system and explores practical pathways for green transition at petroleum depots and gas stations using AI technology, aiming to advance the green and low-carbon transformation of petroleum depots and gas stations in oil product sales enterprises.

Chemical production accidents are often accompanied by toxic substance leakage and combustion, triggering cross-media secondary pollution involving the atmosphere, water bodies and soil. Due to the complex characteristics of multiphase interactions and cross-media migration, such pollution poses serious threats to ecological security and public health. Based on the physicochemical properties of secondary pollutants in chemical accidents, this paper ?systematically analyzes their transmission mechanisms, monitoring & early warning technologies and risk assessment methods. On this basis, a multi-media emergency prevention and control system framework is constructed. Through empirical case analysis, comprehensive control strategies integrating multi-scale coordination, spatiotemporal dynamics, and multi-agent collaboration are proposed. The research further outlines future development directions from technical integration and policy-management perspectives. This provides theoretical framework and practical pathways to enhance emergency management effectiveness in chemical accidents.

As is well known, the production and use of hazardous chemicals plays a vital role in socio-economic development. However, it should also be recognized that incidents such as leakages and explosions can occur during storage, transportation, usage, and other stages due to inadequate management or unforeseen incidents, posing threats to public safety and property. This paper investigates the current status of emergency monitoring when hazardous chemical leakage occurs. Concurrently, it explores the standardized emergency monitoring in order to better serve the response and disposal of emergency environmental emergencies caused by hazardous chemical leakages.

Based on the application of the dual prevention mechanism in safety management and considering the characteristics of petrochemical equipment manufacturing enterprises, this paper identifies hazard sources through analysis of static and dynamic risk points, reasonably evaluates the types and grades of risks, strengthens risk classification and control. Then it presents the measures for hazard identification and management and emphasizes process control as well as supervision and assessment during the operation of the dual prevention mechanism. This provides valuable insights for the research and practice of relevant enterprises.

Based on a poisoning accident case during the maintenance of desulfurization tanks in a petrochemical enterprise, this paper addresses the problems existing in the risk control of confined space operations such as incomplete documentation, detection oversights and inadequate emergency response. It constructs a daily safety management model integrating standardized documentation establishment, on-site visual identification and dynamic monitoring. This model has significantly enhanced the pertinence and reliability of pre-operation gas detection, safety measure configuration and emergency preparedness by improving spatial information registration, strengthening risk warnings and implementing closed-loop management, which effectively promotes the extension of risk control to pre-emptive prevention. This research can provide systematic references for the safety management of confined spaces in high-risk industries such as petrochemicals.

The petrochemical industry operates in complex processes and high-risk environments, where electrostatic issues have long been recognized as critical safety hazards. This paper conducts a systematic study on electrostatic hazards in the petrochemical sector. Starting with analysis of charge generation mechanisms and accident case, it performs an in-depth investigation into the relationship between electrostatic accumulation and environmental factors and expounds the hazard characteristics and operational patterns. Furthermore, it reviews multiple mitigation measures including grounding, shielding, humidification, neutralizers, and monitoring/alarm systems, highlighting their advantages and limitations. Based on this analysis, the paper proposes design principles for optimized hazard mitigation systems, develops integrated multi-technology solutions and validates the feasibility of the approach through experimental and performance evaluation methods.

Aiming at the issues of unclear classification parameters and inconsistent calculation methods for hazardous area classification of explosive gas leaks in the petrochemical sector, this paper analyzes the different classification approaches under API standards, national standards and industry standards. It examines methodologies for hazardous zone division and the calculation formula of gas leakage release radius and conducts three-dimensional simulation analysis of zoned areas. Then the paper develops the visualization software for hazardous area and dispersion radius calculation of explosive gas leaks. This study provides significant operational guidance for enhancing safety in petrochemical sites handling explosive gases.

The majority of oilfields have now progressed to secondary or tertiary recovery stages. Water and gas injection serve as primary measures to replenish reservoir energy and enhance recovery rates. Re-injected water from oilfields invariably contains substantial ferrous ions. Current wastewater treatment processes and equipment — typically employing oil removal, flotation and filtration — struggle to adequately remove these iron ions, thus affecting the quality of the reinjection water. Based on on-site application tests conducted at the Ningyi Station of Liaohe Oilfield's Qingyang Project Department, hydrogen peroxide was integrated into an inorganic flocculant and the composite concentration was optimized. This approach achieved excellent results in removing iron ions from the wastewater.

This article introduces the effects of volatile organic compounds (VOCs) on the environment and human health. It elaborates on specific VOCs control measures for oil product loading gantries serving road tankers from three aspects covering source reduction, process control and end-of-pipe treatment. Technical solutions for VOCs management are explored, proposing a simplified process combining condensation and low-temperature oil absorption to recover high-temperature oil and gas vapors. Case studies validate the effectiveness and feasibility of these measures, identifying tanker truck negative pressure as the core factor influencing VOCs control efficacy. Addressing naphthalene crystallization in vapors is highlighted as a critical intervention. It is recommended to adopt a simplified high-temperature oil gas recovery process to address naphthalene crystallization and recover high-temperature oil gas components. The oil and gas recovery rate is predicted to exceed 97%, demonstrating considerable practicality and targeted effectiveness.

Enhancing the reuse of reclaimed water to achieve resource recovery from industrial wastewater and increase the reclaimed water reuse rate constitutes a critical approach for refining enterprises in implementing green and clean strategies. Enterprises can enhance wastewater reuse rate through multiple approaches such as expanding reclaimed water output, diversifying reuse applications, implementing source control and strengthening management measures. This paper focuses on the methods and processes for reusing industrial wastewater and explores the technical and management measures for enhancing wastewater reuse rate.

This research focuses on lubricant production. It systematically evaluates the pollution trends of volatile organic compounds (VOCs) from typical materials during the manufacturing process through a combined approach of laboratory research and on-site monitoring. The research encompasses high-resolution characterization of petroleum molecular composition in feedstocks, vapor-liquid equilibrium analysis, volatilization potential assessment and ambient air monitoring at operational sites. The results demonstrate minimal volatilization from the selected feedstocks under both production operating temperatures and ambient conditions; field monitoring confirms consistently low-level VOCs concentrations. This research delivers scientific foundations for environmental management in lubricant manufacturing enterprises.