NeSSI at UOP Used exclusively for gas handling Installations –Pilot plants –Combi lab –Catalyst treatment lab Primarily Gen I with some automation Interfaced with a variety of control and data collection systems

Benefits/Drawbacks Benefit –Small footprint Real estate is valuable 3 pilot plants in the space of one –Pre-assembled and tested –Multiple vendors supply units to meet specifications Design Materials of construction Components –Automation Data collection Control

Benefits/Drawbacks Drawbacks –Cabling (power, communications, actuation) is cumbersome –Modification of custom systems may require significant rebuild

A Case for NeSSI Sensor Clusters

Simple Sensors/Selection The Dirty Dozen Density Refractive Index Viscosity Optical Absorbance Dielectric Electrical Conductivity pH/ISE/ORP Turbidity Thermal Conductivity Ultrasonic Moisture Gas Specific –Electrochemical –Metal Oxide –Vapochromic Sensor Selection Understand problem !!! –Expected composition –Pressure, temperature, flow –Physical properties Generally one sensor per variable Orthogonal sensor response to measurands –Co-linear responses provide no new information –Adds redundancy Expect curvature in sensor response –Non-linear modeling techniques