Onstream process analyzer

A list of onstream process analyzers, operating principles, manufacturers, costs, advantages, and disadvantages is given in reference 2. A list of process instrument elements with their accuracy and principles of operation is given in reference 3. 

On-line pervaporation, 18 518 On-line probes, for fermentation, 11 39 On-line vapor permeation, 18 518 On/off feedback controllers, 20 691 Onstream analyzers, 20 682 On-tank leak detection systems, 24 311 Onyx thermal printing process, 19 321 Oocytes, retroviral infection of, 12 457 Oolitic limestone, 15 28 Opacification, colorants for ceramics, 7 344-345... 

Parallel passes (coking heater), 78 Partially coked resid, 40 Pass partition baffle, 27 Pass partition failure (heat transfer equipment), 433—435 Performance test planning, 486-497 strategy, 487-490 laboratory, 487 instruments, 487-488 interfacing units, 488 shift operators, 488 mechanical department, 488 flag sheet, 488-489 onstream analyzers, 488 day before test, 490-491 unit optimization, 490-491 test day, 491 data correlation, 491-496 capital projects, 495 checklist, 497 Performance testing (process unit), 482-483. See also Performance test planning. 

The experiments were conducted with every feedstock at the following operating conditions three temperatures (380°C, 400°C, and 420°C), LHSV of 0.5 h , pressure of 6.86 MPa, and Hj/oil ratio of 891 std mVm. Process performance was monitored by collecting product samples every 10 h during the 240h of time-onstream. The products were characterized by using the standard analytical methods, as mentioned in the previous section. Once a test was completed, the spent catalyst was unloaded from the reactor vessel for characterization. For the test using EHCO, the samples were unloaded from three sections of the catalytic bed (top, middle, and bottom). Ni and V contents on spent catalysts were analyzed by atomic absorption in a Spectrometer Thermoelectron Model Solaar AA. Carbon content was determined by combustion in a Perkin-Elmer 2400 analyzer. 

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