Model FGC-1930 -Special Gas Chromatograph for the Determination of Methyl Tert-Butyl Ether (MTBE)

However, if the added MTBE ratio is not controlled and the theoretical equivalent air-fuel ratio exceeds the adjustment range of the closed-loop control engine electronic control unit adaptive capacity, the closed-loop control will be interfered by oxygen enrichment, and the conversion efficiency of the three-way catalytic converter will be improved. decline. The study also found that MTBE can contaminate groundwater sources, so California and other places in the United States have prepared to disable MTBE. A study by a Japanese research institute also showed that the content of MTBE in gasoline exceeds 7%, and the nitrogen oxides in automobile emissions increase. Therefore, in Japan`s advanced unleaded gasoline, MTBE is added in an amount not exceeding 7%. MTBE is generally synthesized from methanol and isobutylene by means of an acidic catalyst, wherein the catalyst is the most widely used in the industry as a resin catalyst. Among them, different synthetic routes are formed due to different sources of isobutylene. Isobutylene source cracking to ethylene by-product C4 distillate refinery catalytic cracking unit by-product C4 fraction by n-butane as raw material by isomerization and dehydrogenation to obtain a catalyst for the synthesis of MTBE: hydrofluoric acid sulfate styrene cation exchange The reaction of the resin solid acid molecular sieve reaction equation MTBE is a selective addition reaction. The tertiary carbon atom in the olefin forms a positive carbon ion in the presence of an acidic catalyst, and then combines with an alcohol to form an ether. The reaction is a reversible exothermic reaction.

• The instrument adopts internet communication technology, which can easily form a local area network; the Internet realizes long-distance data transmission, remote control, remote diagnosis, and the program can be automatically upgraded.
• full micro-computerized button operation, 5.7-inch large screen 13-line LCD Chinese display, man-machine dialogue mode, easy to operate.
• the new integrated digital electronic circuit, high control accuracy, stable and reliable performance, temperature control accuracy of up to 0.1.
• The unique inlet design solves the discrimination of injection; the double-column compensation function not only solves the baseline drift caused by the temperature rise, but also reduces the influence of background noise, and can obtain a lower minimum detection limit.
• Large oven volume: 300*280*180 can accommodate two 80m capillary columns at the same time.
• The heat insulation effect is better: when the oven, vaporization and detection are both 300 degrees, the hottest temperature of the outer box and the top cover is only 40 degrees, which improves the experimental rate and ensures the safety of the user.
• unique vaporization chamber design, smaller dead volume; replacement of parts: injection pad, liner, polarization pole, collector, nozzle can be replaced with one hand; main body replacement: packed column, capillary injector, TCD The FID detector requires only one wrench to be completely disassembled, making maintenance very convenient.
• The intelligent rear door opening system has stepless variable inlet and outlet air volume, which shortens the system stable balance time after the program rises/falls.
• Two injection systems can be installed at the same time: packed column, capillary split/splitless injection system (with diaphragm cleaning function); two identical or different detectors can be installed at the same time: with FID, TCD, ECD, FPD detection Device. Optional automatic/manual gas six-way injection valve injector, headspace sampler, thermal resolution injector, cracker injector, methane reformer.
• with a powerful and complete power-on self-diagnosis function, visual display of fault information, power-off storage protection, keyboard lock function and anti-power mutation interference function.