XIII, A, 3 Ycasiano and Valencia: Producer-gas Plant 113 



The Batan coal used in firing the producer had been stored 

 for several years.* 



The size of coal used varied from a powder to about 4 centi- 

 meters, and the Fushon coal contained an especially high per- 

 centage of slack. Preliminary trials were carried on for several 

 weeks, during which time care was used to determine the in- 

 fluence of different sizes of fuel. The uniformity of size has 

 little influence, and now the coal is used as delivered, either 

 directly or after being screened, for charging the producer. 

 Large lumps are broken into pieces about 3.5 centimeters in 

 diameter. 



The data given in Tables II and III are the averages of twenty 

 tests ranging from six to fifty-five hours in duration. In each 

 test readings were taken every fifteen minutes, except during the 

 night shifts. The fuel used in tests 1 to 16 was Batan coal, and 

 in tests 17 to 20 it was Fushon coal. 



Table IV shows the results of tests for the entire power plant. 

 These results were computed from data shown in Tables II 

 and III. 



Table V gives the analyses of intake and exhaust gases of the 

 gas engine. The numbers of analyses correspond to those shown 

 in the previous tables. 



Analyses marked "A" and "B" show very low content of carbon 

 monoxide. These were made on producer gas from a Chinese 

 coal. The coal caked very considerably, and the engine was 

 run only for about four hours, when the producer was clogged, 

 stopping the formation of gas. An attempt was made to over- 



* It is interesting to compare its analysis with that made by Cox [This 

 Journal, Sec. A (1907), 2, 52] of a fresh sample from the same coal seam 

 secured many years before, whose results are as follows: 



Batan Island, Bett's. 



Official 

 method. 



Smok- 

 ing-ofF 

 method. 



Water 



Volatile combustible 



Fixed carbon 



Ash .__. 



Total sulphur 



Per cent. 

 15.41 

 15.42 

 41.74 

 41.83 

 39.05 

 38.97 

 3.80 

 3.78 

 0.22 



Per cent. 

 55.41 

 15.42 

 39.46 

 39.46 

 41.02 

 41.00 

 4.11 

 4.12 



