Due to operational process changes, a mid-continent refinery was confronted with the problem of having excess mercaptans in their gasoline blend stock. The mercaptan content in the gasoline run down from the FCCU exceeded the designed capability of their existing mercaptan removal processes. BJ Chemical Services recommended the use of...
This paper discusses about, feeding strategies that optimize rumen function result in maximum milk production and milk component percentages and yield. Feed additives and management tools such as bST bovine somatotropin play an essential role in enhancing production and yield of milk and milk components. The need for a particular...
This case study describes about food packaging. An EU based company that produce plastic films for food packaging needed to have an overview of where it could market the newly developed product containing a polymeric additive which is restricted by the European food contact legislation. The check had to be...
A refinery in Mexico was experiencing high corrosion rates in the atmospheric crude unit overhead exchangers. BJ Chemical Services was invited to investigate the problem and propose solutions. A BJ Chemical Services FastBreak additive was selected for use and a field trial was initiated. High desalter efficiency was realized using...
A major Gulf Coast refinery experienced a significant decrease in the activity of their hydrotreating catalyst. The hydrotreater feedstock was primarily composed of distillate from the refinery's delayed coker unit. It was theorized that the loss in activity was caused by silicon contamination. The silicon deposits on the surface of...
This report gives the California Energy Commission staff's survey of the U.S. ethanol industry between May and August 2001. This survey was designed to develop a complete and accurate inventory of the country's existing and planned ethanol production capacity during the period California is looking to increase its use of...
The ultimate goal of the study was the selection or design of a test device and investigation of novel materials to reduce settlement and sag. Correlation of settling and sag measurements by each of the test devices or protocols with the Sag Flow Loop measurement was calculated in an attempt...
In this paper we study the statistical properties of a characteristic-function based algorithm for independent component analysis ICA. First, statistical consistency of this algorithm with pre-whitening is analyzed, especially under heavy-tailed sources. Second, without pre-whitening this algorithm is shown to be robust against small additive noise.
This paper presents a set of new statistical methods to model the U.S. men's wear markets along with the general consumption trends among U.S. male and female populations. The Almost Ideal Demand AID system of Deaton and Muellbauer (1980) is extended to include general, non-linear, and non-additive habit effects. By...
The objective of this paper is to investigate the relationship between white matter abnormalities and impairment of gait and balance in older persons. This cross-sectional study suggests that decreased white matter volume is age-related, while increased WMSA are most likely to occur as a result of disease. Both of these...
This paper will review the advantages of polyethylenimine PEI against the backdrop of these developing issues, review the additive programs available to address these issues, detail how modified PEI works in systems, and highlight a range of examples of modified PEI on the job. Mill cases are presented with a...
A Gulf Coast Refiner was starting up a new hydrotreater with significant reservations about fouling. They had experienced significant fouling problems on a number of hydrotreaters previously. The new hydrotreater was to process heavy coker gas oils, which are expected to cause high fouling. The test results showed that Unichem-7401...
Article shows clearly that the proposed historical simulation approach has advantages over both existing approaches and the nice properties of additive aggregation and the ease of explanation make it a suitable choice for large scale market risk measurement. According to article the historical simulation approach which is proposed in the...
Consumers may see packaging as the attractive and informative container for fresh and processed meat and poultry. However, because it touches the food, packaging is considered an indirect additive. That's because chemicals in packaging can migrate into the food. The following information explains various types and uses of meat packaging...
Filtering data is a quick and easy way to find and work with a subset of data in a range of cells or in a table column. Filtered data displays only the rows that meet criteria that you specify and hides rows that you do not want to display. You...
A probability model is presented for the dynamics of mutation selection balance in a haploid infinite-population infinite-sites setting sufficiently general to cover mutation-driven changes in full age-specific demographic schedules. The model accommodates epistatic as well as additive selective costs. Closed form characterizations are obtained for solutions in finite time, along...
This report examines the expected benefits of varying combinations of ITS applications: Freeway Service Patrol, Changeable Message Signs, and Ramp Metering. The research analyzes the simulated results of a stylized network in a microscopic traffic simulator. The traffic network includes parallel roadways, ramp meters, and changeable message signs. The paper...
This paper focuses on liquid additive control cement slurry properties. While liquid additives are used in offshore & international cementing operations, land-based operations use a bulk dry batch-mixed process. Additives control cement volumetric yield, thickening time, compressive strength, free water, rheology, and fluid loss control. Better quality control, cost savings,...
This paper discusses about the accelerated ageing tests on large numbers of dye sensitized solar cells show, that to first order a separation between the effects of the stresses visible light soaking, UV-illumination and thermal treatment on long-term stability which can be made. The corresponding mechanisms are of electrochemical, photochemical...
Techmer PM, a Tennessee-based designer and producer of color and additive concentrates for the plastics industry, was founded in 1981 with one major objective: to supply technical expertise and manufacturing capability that would reliably add value to their customers' products. When increased production demands strained the efficiency of such mission-critical...
