Chemicals & Materials

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Flow of Solids in Bins, Hoppers, Chutes and Feeders

Instructor-led (classroom) Course

Gain a strong, fundamental understanding of bulk solids and bulk solid handling equipment and their behavior, along with the general principles and practical applications of solids flow.

Chem Economics: ACC Releases Portfolio of Specialty Chemicals Indexes

September

2012

Chem Economics

T. Kevin Swift

The American Chemistry Council (ACC) has launched a new set of indexes covering nearly 30 segments of the U.S. specialty chemicals market. (The first, which dealt with plastic additives, was discussed in the July issue, p. 13.) This is the first set...

Failure Mechanisms in Lithium Ion Batteries: Opportunities for Materials Development

AIChE Webinar

Sep 19, 2012

Dee Strand

This presentation will focus on the primary failure mechanisms for lithium ion batteries, how those mechanisms are affected by material selection, and vehicle applications for batteries and their future development.

Flare Minimization Via Dynamic Simulation

Mar 15, 2011

Kuyen Li

Flaring in chemical process industry (CPI) is an important method to protect equipment and personnel safety during the process upset and the chemical plant turnaround. However, excessive flaring emits lots of carbon dioxide as well as air pollutants, which cause negative environmental and social...

Challenges In Using Refinery Fuel Gas Feedstock for Steam Reforming Based Hydrogen Plants

Mar 15, 2011

Peter V. Broadhurst

CHALLENGES IN USING REFINERY FUEL GAS FEEDSTOCK FOR STEAM REFORMING BASED HYDROGEN PLANT Peter V Broadhurst & Graham Hinton (Johnson Matthey Catalysts, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK) ABSTRACT Operators of steam reforming based hydrogen plants are seeking feedstock...

Co-Cracking Vs. Segregated “Hybrid” Cracking In Individual Furnaces – Design and Operational Considerations

Mar 15, 2011

Marco W.M. Van Goethem

Cracking furnaces are the heart of the ethylene plant. Ethylene producers purchase various feedstocks ranging from “Gas” feeds: ethane, propane, butane and ethane propane mix, “Liquid” feeds: NGL’s, naphtha and up to “Heavy liquid” feeds: condensates, atmospheric gas oil (AGO), and vacuum gas oil (...

Wastewater Treatment for Refineries Using Canadian Tar Sands SAGD Crude as Feed Stock

Mar 15, 2011

Rafique Janjua

Refineries using Canadian Crude as feed stock are experiencing high emulsion wastewater from Desalter mud wash operation. This waste is high in COD /BOD loading and will exert shock to the aeration system by scavenging dissolved oxygen and resulting in misoperation and NPDES exceedences. Emulsion...

Introductory Remarks

Mar 15, 2011

Michael J. Tallman

Operational Inputs Into the Mechanical Integrity Program

Mar 15, 2011

F. Russ Davis

A predictive mechanical integrity (MI) program is based on the following: * Damage mechanisms that affect process equipment. * Rate at which degradation progresses. * Ability of the inspection group to identify and correct equipment damage before equipment failure. Operational temperature, pressure...

Cracked Gas Compressor Control Tutorial

Mar 15, 2011

Nauman Islam

The market conditions over the couple of years has prompted many end-users to review antisurge control design to help lower their energy index. A number of factors affect antisurge control system design and consequently impact the surge control margins. Cracked/charge gas compressors have evolved...

Improving Ethylene Charge Gas Compressor Performance

Mar 15, 2011

Giorgio Greco

The changing landscape of the ethylene industry requiring more feedstock flexibility and upstream and downstream integration increases the complexity of cracker design and management exacerbating challenges traditionally present in ethylene plant operations such as the fouling phenomena. The...

Objectives of Anti-Surge Control

Mar 15, 2011

W. Brian Piercy

Objectives of Anti-Surge Control Preventing a compressor surge is the primary purpose of an anti-surge controller. However, there are additional requirements that must be met for an anti-surge control package to be effective. It must be stable and reliable, while also keeping energy costs to a...

Advanced Hydrogen Management : More Than a Balancing Act

Mar 15, 2011

Sanjiv Ratan

Modern high complexity refining landscape involves increasing proportion of “opportunity crude” processing and widened bottom-of-the-barrel strategies, which together with ever stringent ‘clean fuels’ requirements has led to extensive need for hydrogen and its optimization in the refinery. This in...

Preparation of Perovskite-Based Catalysts and Fuel Injection System for Diesel Reforming

Mar 15, 2011

Yong-Gun Shul

Autothermal reforming processes of hydrocarbon liquids such as diesel fuels are spotlighted as methods to produce hydrogen for Fuel cell. However, the use of higher hydrocarbons as feedstocks for hydrogen production causes some problems which increase the catalyst deactivation by the carbon...

Trip & Throttle Valve Reliability

Mar 15, 2011

Joan del Castillo

Trip & Throttle Valve Reliability Trip & Throttle (or Stop) valves are used in ethylene plants to isolate the energy to steam turbines when required. They are critical Safety Protection components with a high impact on a plant’s reliability; however, they operate under tough conditions like...

Practical PID Control: Use Filters for Better Disturbance Rejection and Setpoint Tracking

Mar 15, 2011

Patrick P. Thorpe

Many of the practical problems in achieving high performance feedback control for challenging applications have been addressed by modifications to the basic PID control law. These modifications include set-point filters that allow both load rejection and set-point following objectives to be...

Ethylene Boil-off Compressor Process Safety Incident

Mar 15, 2011

Niara Eckhard Uhlein

Braskem, a Brazilian player among petrochemical manufacturers, produces monomers, resins and chemicals specialties. The overall Ethylene capacity is 3,600 KTA, distributed in six Olefins plants. Naphtha is the main raw material of the petrochemical and plastic productive chain in Brazil, followed...

The Importance of Carbon and Hydrogen Management In the Development of Thermochemical Production of Biofuels

Mar 15, 2011

Richard G. Mallinson

Biomass has the potential to supply significant quantities of transportation fuels as increasing worldwide demand will place significant pressure on the supply. In the US, increasing imports of energy could make any imbalance especially acute, as has been demonstrated in the past. Additionally,...

Inferential Monitoring & Optimization of Crude Units Via Hybrid Models

Mar 15, 2011

Vladimir Mahalec

Refinery crude units often process variety of feedstocks. If properties of the feed entering the crude unit are not precisely known, it is difficult to predict how changes in the tower operating conditions will affect properties of the products. Similarly, if on-line analyzers are not available, it...

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