Pages 53 - 60. Powered chemical processing equipment includes pumps, compressors, agitators and mixers, crushers and grinders, and conveyors. Drivers are electric motors, steam or gas turbines, and internal combustion engines. For loads under 150 HP or so electric motors are almost invariably the choice.

Electric field-intensified chemical processes and reaction chemistry. Electric fields (EFs) represent an important resource that can be utilized for process intensification in the chemical industry. The impacts of EFs on atoms, molecules, particles, and complex matter can vary significantly and trigger a range of potential new technologies for ...

Since the term "synthesis" proposed by Rudd, Powers, and Siirola (1973), over the past several decades, process synthesis has had a significant impact on the development, design and operation of (petro) chemical processes.Process synthesis can be considered as the cornerstone of the process design activity (Nishida et al., 1981, …

Dynamic response/transfer function describes the relationship of output and input variables, and it plays a key role in the design and analysis of control systems (Seborg et al., 2011).One of the traditional methods to determine the transfer function of chemical processes is the parametric identification (Chang et al., 1992, Kon et al., 2013, Velieva, …

The yield or total annual cost (TAC) of the process is regarded as the object function. Degrees of freedom analysis and sensitive analysis are performed for a given chemical process to identify the key decision variables that have significant impacts on the object. The boundary of those decision variables will be determined.

1. Introduction. The tremendous expansion of chemical industry, both in plant size, location, and process complexity, has induced demanding work for handling hazardous substances involved in the storage, inventory, operation, and transportation units (Khan and Abbasi, 1999; Srinivasan et al., 2019).To cope with the increased safety …

It becomes common to wear a disposable face mask to protect from coronavirus disease 19 (COVID-19) amid this pandemic. However, massive generations of contaminated face mask cause environmental concerns because current disposal processes (i.e., incineration and reclamation) for them release toxic chemicals.The …

The global drivers for development include electrification, circularity to reduce or eliminate waste, and to achieve low carbon emissions. This results in major research efforts to explore both known and less well studied chemical pathways in new reactor concepts. The chemical reactor is the heart of any chemical process.

Description. Chemical Process Structures and Information Flows focuses on the role of computers in the understanding of chemical processes, including the use of simulation and optimization in computational problems. The book first underscores graphs and digraphs and pipeline networks. Discussions focus on cutsets and connectivity, directed ...

5. Digital twins for electro-physical and chemical processes. In the context of the DT concept for enhancing manufacturing processes, several challenges and opportunities can be identified for the electro-physical and chemical processes. For EDM processes, generally, the process performance in terms of achievable material removal …

Chemical changes. Chemical changes result in the formation of new substances when the composition of the original substance is changed; for example, when a metal reacts with the oxygen of the air it forms a new substance called an oxide (as when iron goes rusty). Essential oils can also react with oxygen, which alters their chemical composition ...

This dataset contains 41 measured and 11 manipulated variables from multiple simulations of a chemical process consisting of a reactor, condenser, compressor, separator, and stripper (Chiang et al., 2000). The simulations introduce 20 different faults to the process, with one fault type for each simulation.

Section snippets Methodology. The methodology employed in this study (Fig. 2) involved process modeling and simulation for enzymatic process using SBO and …

Search ScienceDirect. Chemical Engineering Science. Volume 246, 31 December 2021, 116851. A variable relevant multi-local PCA modeling scheme to monitor a nonlinear chemical process. ... Many chemical processes involve variability in the raw material quality, changes in equipment characteristics or changes in seasons. ...

Key Features. Includes case studies that explain step-by-step modelling methodologies. Covers detailed multiscale modelling of chemical processes, providing examples from …

The objective of the study is was to identify the reasons for equipment based accidents. The most frequent accident causing equipment were piping (25%), reactors and storage tanks (both 14%) and process vessels (10% of equipment accidents). The six most accident-prone equipment is process related involve nearly 80% of accidents.

The impact of the value of alpha is further discussed later in this work. The above formulation allows a chemical process to carry out production scheduling and determine power consumption profiles for frequency regulation locally. Download : Download high-res image (559KB) Download : Download full-size image. Fig. 1.

This paper focuses on dynamic quantitative risk assessment and its integration with operational performance analysis, to assess the safety and quality of the process facility. In order to achieve the highest levels of safety and quality, with the ultimate goal of fostering a zero-incident and zero-defect culture, the aim should be to eliminate ...

However, various processes from previous investigations have mostly been limited in treating 100–1000 mg F-/L with secondary pollution commonly overlooked. Re-assessing the available defluoridation technologies, chemical precipitation has still been the most feasible among the technologies, especially extremely high fluoride …

For process optimization using pseudo-transient models, Pattison and Baldea [23] proposed a time-relaxation optimization algorithm [45].However, such an algorithm has not been commercialized in Aspen Custom Modeler (ACM) and many other EO software, as it is very difficult for most chemical engineers to develop such an algorithm on the …

Description. The kinetics of reactions in soil and aquatic environments is a topic of extreme importance and interest. To properly understand the fate of applied fertilizers, pesticides, and organic pollutants with time, and to thus improve nutrient availability and the quality of our groundwater, one must study kinetics. This is the first compre.

Methods in Chemical Process Safety. Chapters & Volumes. Latest volume. All volumes. Edited by Faisal Khan - Centre for Risk, Integrity and Safety Engineering (C-RISE), Faculty of Engineering & Applied Science, Memorial University, St …

The framework timbers for a strong safety culture is defined including: safety as a core value, leadership, enforcement of high standards, effective communications, empowered employees, deferring to expertise, and fostering mutual trust. Select 17 - Sources of helpful information for practicing chemical process safety.

Search ScienceDirect. Process Safety and Environmental Protection. Volume 167, November 2022, Pages 480-492. A novel deep learning model based on target transformer for fault diagnosis of chemical process. ... Although chemical processes are an important element of industry, accidents involving these processes cause significant …

A physico-chemical process based on coagulation–flocculation produces treated wastewater mainly composed of soluble and colloidal matter. A part of supracolloids responsible for TSS is always present, their remaining concentration depending on the coagulant dose. The stability of the treated wastewater is not well known, and it is not …

1. Introduction. In light of the societal and legislative pressure on the process industry to increase its sustainability and to remain competitive in a more globalized world, model-based process optimization can play an important role both in process design and operation (Liu and Huang, 2012, Ren et al., 2016).When optimizing (bio)chemical …

To evaluate the proposed closed-loop identification algorithm and experimental design, a case study was conducted on a reactor at Eastman Chemical's plant in Kingsport, Tennessee. The chosen process is similar to that used in Caveness and Downs (2005). The process produces dimethyl terephthalate (DMT) by reacting …

Firstly, inherent safety has been deemed as the top hierarchy for loss prevention. The strategies for risk reduction, whether for the likelihood or severity, can be hierarchically classified into the following four levels (Fei et al., 2018; Hendershot, 1995a, b, 1997; Jafari et al., 2018).Level 1: administrative (procedural) strategies based on the …

Description. Thermodynamic Models for Chemical Engineering gives an overview of the main thermodynamic models used by engineers and in engineering researcher processes. These fall into two main families, equations of state and activity coefficient models. The book presents the state-of-the-art of purely predictive models.

The application of the proposed resilience optimization framework is illustrated through the superstructure optimization of shale gas processing and NGLs recovery processes (He and You, 2014, He and You 2016).Figure 1 shows a superstructure that integrates 108 possible process designs for shale gas processing and natural gas …