Containment exhaust equipment

The lead alkyls and scavengers contained in fuels cause rapid poisoning ol exhaust gas catalytic converters. They are tolerated only in trace quantities in fuels for vehicles having that equipment. The officially allowed content is 0.013 g Pb/1, but the contents observed in actual practice are less than 0.005 g Pb/1. 

The product gas after cleanup consists of primarily CO and H2. Combustion of coal gas in high firing-temperature gas turbines converts virtually all of the CO to CO2, and gas turbine exhaust is expected to contain no more than 10 ppm CO when operating at design conditions. Carbon monoxide emissions from a CGCC plant are thus expected to be around one-tenth those of a modem coal-fired plant equipped with low NO burners. 

Design plant/equipment so as to contain the material and provide adequate dilution or exhaust ventilation as appropriate... 

In preparation for one trip, Patterson and his colleagues cleaned 500 plastic containers in vats of nitric acid, rinsed them in pure water, filled them with pure argon to displace lead-contaminated air, and sealed them in plastic bags equipped with breath filters. Even then, the containers contributed about 0.05 millionths of a gram of lead to each sample as they were trucked from the factory to Caltech, automobile exhaust had sprayed them with thousands of micrograms of lead. For Patterson s next trip, he collected the containers directly from the factory production line and sealed them immediately into plastic bags before their trip to his laboratory. 

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