Patent ID: 8334142
Filing Date: 2012-12-18
Classification: G01N,Y10T

Abstract:
1. A process control system for closed-loop control of a hydrocarbon process having at least one liquid hydrocarbon mixture flowing therethrough, which liquid hydrocarbon mixture includes an unknown concentration of components including hydrocarbons, said system comprising: an analyzer having a fluid flow path configured to convey the liquid mixture continuously in a downstream direction from the hydrocarbon process, the analyzer including: an instrument disposed along the fluid flow path, and configured for measuring a property of the liquid mixture, the instrument configured to have responsivities to concentrations of one of the components, substantially independent of the concentrations of others of the components; a temperature detector configured to generate temperature data for the liquid mixture; a model of responsivities to various concentrations of the components at various temperatures; and a processor configured to capture data generated by the temperature detector and the instrument, and to use the data in combination with said model to determine a temperature compensated concentration of said components in said liquid mixture while the liquid mixture flows continuously through the fluid flow path; a process control module (PCM) including a process model of the hydrocarbon process, the PCM communicably coupled to the analyzer and being communicably couplable to the hydrocarbon process; and the PCM configured to receive the temperature compensated concentration from the analyzer as an input to the process model, and to generate at least one output configured to affect operation of, and receivable by, the hydrocarbon process, the process control system further comprising a filter module communicably coupled to said processor, said filter configured to mathematically filter said temperature compensated concentration.