Collection, chemical analysis, and evaluation of coal samples in 1975

Abstract

C.1TUS L " ^ ^ ^^^^ ^ ^ JLJL 3. Percent of samples by coal rank 16 4. Average composition of all coal samples in United States and of ranks of coal 17 5. Means and ranges of analyses, 53 anthracite samples, Pennsylvania anthracite region 25 6. Sample descriptions and analyses, 53 anthracite samples, Pennsylvania anthracite region 28 7. Means and ranges of analyses, 331 coal samples,

Estimates of global, regional, and national annual CO{sub 2} emissions from fossil-fuel burning, hydraulic cement production, and gas flaring: 1950--1992

“…carbon/ hydrogen ratio, and hence carbon content of a crude oil. Coleman et al (1978) have assembled analytical data, including API gravity. for 800 important US crudes representing major fields and producing formations.…”

A thermogravimetric analysis of the combustion of a Brazilian mineral coal

“…Those compounds are generally present in coals in variable amounts. For instance, it represents in average up to about 1.7 % of the total sulfur present in north american coals 46 , and up to 72 % of the sulfur in Polish coals 47 . The X-ray difraction results were confirmed in repeated experiments.…”

Boron enrichment of plants and soils treated with coal ash

“…The station utilizes subbituminous coal from the Black Mesa field in Arizona. The mean ash, S, and B contents calculated from analysis of 16 samples from this field (Swanson et al, 1976) were 7.6 ± 0.8%, 0.46 ± 0.11%, and 31.6 + 15.8 ppm, respectively. The station is equipped with electrostatic precipitators for fly ash collection.…”

“…Results of an extensive analysis of coal samples from various U.S. coal fields show a range of B content from 10 to 100 ppm and an overall average of 50 ppm (Swanson et al, 1976). Similarly, Clark and Swaine (1962) reported a range of B concentrations in Australian coals of < 3 to 400 ppm and a mean of 60 ppm.…”