121
0
°py of Experiments made at the Alliance Gas Company’s Works in Dublin , during thepast year 1837. By Joseph Hedley, Esq.
Results of experiments on the qualities of various coals for the production of gas ; its/ a ‘Ue in illuminating power; produce of coke, and quality; and other particulars"'Portant in gas-making:—
. Gf Experiment, Saturday, May 27th, 1837.—Deane coal (Cumberland), 2 cwt. of‘2 lb S- each ( 0r 224 lbs.) produced 970 cubic feet of gas; 4 bushels of coke of middlingybality ; specific gravity of the gas, 475. Consuihed in a single-jet burner, flame 4ac hes high, 1_*_ cubic feet per hour; distance from shadow 76 inches or 2-3 mouldJudies. Average quantity of gas made from the charge (6 hours) 4-33 cubic feet perS or 9,700 cubic feet per ton of 20 cwt. Increase of coke over coal in measure, not3 u Ue 30 per cent. Loss jn weight between coal, coke, and breize, 56 lbs., converted into° as ) tar, ammonia, &c,
2d Experiment, May 28th .—Carlisle coal (Blenkinsopp). 224 lbs. produced 1,010"hie. feet of gas, 4 bushels of coke of good quality though small; increase of coke over°al in measure not quite 30 per cent. Loss in weight, same as foregoing experiment.f- v erage quantity of gas made from the charge (6 hours) 4-5 cubic feet per lb. or 10,080l>er ton.
Illuminating Power of the Gas.
Consumedper hour,single jet.
Distancefrom candle.
Equal tocandles.
Specific
gravity.
’To
5
Inches .
70
2-72
•475
ditto with 20-hole ^
^ argand burner - - - ^
25
21-33
•475
When charge nearly ofT -
1_A-
85
1-84
•442
When charge quite off, with 20- 1.hole argand burner - - )
9
100
not 1
•266
Experiment, May 29th. —Carlisle coal (Blenkinsopp). 112 lbs. produced 556e b,c feet of gas. Other products, loss of weight, &c., same proportion as foregoing.Pwiment. Average quantity of gas made from the charge (6 hours) 4-96 cubic feetor 11,120 per ton.
ilh 11 experiment the quantity of gas generated every hour was ascertained; the‘jnating power, the specific gravity, and the quantity of gas consumed by the singleg. ' v ‘th a flame 4 inches high, was tried at the end of each hour, with the respectivees generated at each hour; and the following is a table of results.
RESULTS.
Hour.
Gas produced.
Consumedper hourper single jet,
4 inches high.
Specific gravity.
Distance ofcandle fromshadow.
Illuminatingpower equal tomould candles.
Cubic Feet.
Cubic Feet,
Inches .
1st.
150 |
11| lOths. )orl-15 )
•534
70
2-72
2d.
120
11
•495
75
2-36
3d,
95
12
■344
75
2-36
4th,
5t.h,
95
15
•311
80
2-08
80
17
•270
85
1-81
6 th.
16
29
•200
ioo
not one.
Total
556
-
Average of the above gas, 6-hour charge.92# 16 lOths. nearly -359 81
2-03
Average of the above gas, at 4-hour charge.
115 12J lOths. -421 75 2-36
^ r °duction of gas in 6 hours, 556 feet, or at the rate of 11,120 cubic feet per ton.Ditto in 4 hours, 460 feet, or at thfc rate of 9,200 ditto.