A Comprehensive Review on Thermal Coconversion of Biomass, Sludge, Coal, and Their Blends Using Thermogravimetric Analysis

Table 1

Elemental and chemical composition of coal.

Year	Sample	Proximate analysis (wt.%)				Ultimate analysis (wt.%)					HHV	Ref.
		Moisture	Volatiles	Ash	Fixed carbon	C	H	N	S	O	MJ/kg
2017	Coal	8.59	68.55	6.62	16.14	64.49	7.22	2.09	—	26.20	—	[52]
2017	Bituminous coal	4.18	30.56	15.38	49.88	79.31	4.72	1.03	1.3	13.38	—	[53]
2016	Bituminous coal	4.18	30.56	15.38	49.88	79.31	4.72	1.03	1.3	13.38	25.44	[54]
2016	South African coal	2.1	29.4	13.9	70.6	70.58	3.99	1.77	0.63	7.93	33.2	[55]
2016	Bituminous coal	—	36.8	9.7	53.5	70.5	4.1	1.0	—	14.7	—	[56]
2015	Bituminous coal	—	34.39	11.43	56.91	76.04	4.99	0.86	0.62	8.42	—	[57]
2015	Bituminous coal	2.28	9.09	16.57	72.06	74.50	2.66	1.39	0.48	18.96	28.10	[58]
2015	Bituminous coal	11.22	8.01	30.33	61.66	62.07	2.30	1.16	2.21	1.93	24.38	[59]
2014	Bituminous coal	4.18	30.56	15.38	49.88	79.31	4.72	1.02	1.3	13.38	25.44	[60]
2014	Bituminous coal	3.34	34.25	6.70	55.72	73.16	5.21	4.40	1.53	5.66	—	[61]