With a growing population, an increasing number of petrochemical facilities are built with larger capacity and more complexity, which pose a great risk to assets, community and environment. The value of inherently saf...With a growing population, an increasing number of petrochemical facilities are built with larger capacity and more complexity, which pose a great risk to assets, community and environment. The value of inherently safer design is recognized with time by all stakeholders, and an effective tool is needed to evaluate and compare inherent safety of alternative technologies. This study developed a safety index to evaluate existing technologies for their safety levels and guide inherently safer design. The Integrated Risk-based Safety Index(IRSI) was developed based on a comprehensive review of petrochemical processes, incident cases from Sinopec and US Chemical Safety Board, and existing safety index systems. The IRSI included all major hazards, including fire, explosion,toxic release, dust explosion, physical explosion, and runaway. Also, the integrated life cycle approach considered chemical hazards, equipment failure rates and safety measures in this risk-based index. Advanced modeling techniques, PHAST simulation and Neural Network, were used in the development of three novel sub-indices in the projects, fire, explosion and toxic release. The index system could be easily incorporated into a user friendly tool for the ease of application. A case study of hydrogen dioxide was conducted using the IRSI, which showed its capability for evaluating the safety level of process facilities.展开更多
A method of copper removal from composite wires of copper stainless steel fibers by means of sulfuric acid solution with hydrogen dioxide is described. After removing copper, the stainless steel fibers remain smooth ...A method of copper removal from composite wires of copper stainless steel fibers by means of sulfuric acid solution with hydrogen dioxide is described. After removing copper, the stainless steel fibers remain smooth and uniform, keep high strength and are arranged in order. The copper sulfate with 5 H 2O (CuSO 4 5H 2O) can be crystallized directly from the reaction solution.展开更多
基金Supported by the National Key Research and Development Program of China(2016YFB0301701)National Natural Science Foundation of China(21606258).
文摘With a growing population, an increasing number of petrochemical facilities are built with larger capacity and more complexity, which pose a great risk to assets, community and environment. The value of inherently safer design is recognized with time by all stakeholders, and an effective tool is needed to evaluate and compare inherent safety of alternative technologies. This study developed a safety index to evaluate existing technologies for their safety levels and guide inherently safer design. The Integrated Risk-based Safety Index(IRSI) was developed based on a comprehensive review of petrochemical processes, incident cases from Sinopec and US Chemical Safety Board, and existing safety index systems. The IRSI included all major hazards, including fire, explosion,toxic release, dust explosion, physical explosion, and runaway. Also, the integrated life cycle approach considered chemical hazards, equipment failure rates and safety measures in this risk-based index. Advanced modeling techniques, PHAST simulation and Neural Network, were used in the development of three novel sub-indices in the projects, fire, explosion and toxic release. The index system could be easily incorporated into a user friendly tool for the ease of application. A case study of hydrogen dioxide was conducted using the IRSI, which showed its capability for evaluating the safety level of process facilities.
文摘水杨醛与牛璜酸以1∶1的比例在无水乙醇中反应,生成水杨醛缩牛璜酸席夫碱,再与C u(Ⅱ)金属离子络合,合成Schiff碱铜配合物,用红外光谱证实了其结构。通过"正交试验法"研究了该配合物对双氧水漂白棉织物的催化作用。实验对漂白后的棉织物的断裂强度、白度等指标进行了测试及分析,结果表明,该配合物对双氧水漂白有较好的催化作用。当配合物的浓度为0.4 g/L,pH=9,温度为60℃,时间为60 m in,此时棉织物的白度和断裂强度较好。
文摘A method of copper removal from composite wires of copper stainless steel fibers by means of sulfuric acid solution with hydrogen dioxide is described. After removing copper, the stainless steel fibers remain smooth and uniform, keep high strength and are arranged in order. The copper sulfate with 5 H 2O (CuSO 4 5H 2O) can be crystallized directly from the reaction solution.
