Enhancement of Methane Concentration by Removing Contaminants from Biogas Mixtures Using Combined Method of Absorption and Adsorption

Table 1

Experimental properties of methane enhancement research work.

Run	Removal mixture	Uploaded water (l)	Chemical substances quantity (g)	Range of pH	pH modulates	Time per exp. (Min.)
R1	CaO	1	1–10	—	HCl/NH3	60
	Fe2O3	1		5–9.5
	Silica gel	—		—
R2	CaO	1	1–10	—	HCl/NH3	60
		1		5–9.5
	Na2SO4	—		—
R3	CaO	1	1–10	—	HCl/NH3	60
	FeCl2	1		5–9.5
	Silica gel	—		—
R4	CaO	1	1–10	—	—	60
		1		—
	Silica gel	—		—
R5	CaO	1	1–10	—	—	60
	Activated carbon	—		—
	Na2SO4	—		—