Carbon Molecular Sieves

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Carbon Molecular Sieves

Carbon Molecular Sieves

中文名：碳分子筛

Carbon molecular sieve is a new kind of adsorbent developing from 1970, and is excellent non-polar carbon material. It can be used to separate the nitrogen from the oxygen under normal temperature and pressure (PSA). To compare with tradition, PSA (Pressure swing adsorption at room temperature) has some advantages such as low investment, short start-up time, high production rate and low cost of nitrogen.

Carbon molecular sieve raw material is coconut shell, coal, resin, etc.

Carbon molecular sieve utilize the different sizes of nitrogen molecules and oxygen molecules to achieve the aim of separation of the oxygen and nitrogen, in carbon molecular sieve internal contains a large number of micropores, these micropores allow oxygen molecules rapidly spread into them, but large diameter such as nitrogen molecules are restricted into them. Aperture size is the basis of carbon molecular sieve to separate oxygen and nitrogen, if the aperture is too large, the oxygen nitrogen molecules are easily into the pores, and if the aperture is too small, the oxygen nitrogen can’t spread into the pores, therefore would not achieve the effect of separation.

Carbon molecular sieve processing steps:

The first step is to shape;

The second step is activation and pore-forming, spraying into activator under 600~1000℃, commonly used activator is carbon dioxide, oxygen, water vapor or mixture of them;

Step 3 is using chemical steam adjusting aperture size, for example, used benzene vapor deposition in carbon molecular sieve pore wall to control its micropore aperture distribution, and make it in the range of 0.28 ~ 0.38 nm.

Diameter: 1.0-2.2mm

Absorption period: 2×60 second

Bulk density: 630-660 g/l

Crushing strength: ≥100N/p Min

Packing: plastic drum, 20kg/40kg

Model	Adsorption pressure (MPa)	Nitrogen purity (%)	Output rate of nitrogen (L/h.Kg)	Nitrogen reclaim rate (%)(N₂/Air)
CMS-140	0.6	99.9	60	24
		99.5	120	36
		98.5	195	50
	0.8	99.9	75	24
		99.5	140	35
		98.5	220	29
CMS-160	0.6	99.9	80	28
		99.5	140	39
		98.5	240	54
	0.8	99.9	100	23
		99.5	160	34
		99	200	38
CMS-185	0.6	99.99	46	≥21
		99.9	100	≥31
		99.5	160	≥40
		99.0	220	≥45
		98.0	250	≥46
		97.0	300	≥48
	0.8	99.99	58	≥21
		99.9	115	≥31
		99.5	185	≥40
		99.0	245	≥45
		98.0	300	≥46
		97.0	355	≥48
CMS-200	0.6	99.99	60	≥21
		99.9	115	≥31
		99.5	165	≥40
		99.0	250	≥45
		98.0	265	≥46
		97.0	325	≥48
	0.8	99.99	72	≥21
		99.9	140	≥31
		99.5	200	≥40
		99.0	275	≥45
		98.0	325	≥46
		97.0	365	≥48
CMS-220	0.6	99.99	65	≥21
		99.9	120	≥31
		99.5	175	≥40
		99.0	260	≥45
		98.0	278	≥46
		97.0	335	≥48
	0.8	99.99	85	≥21
		99.9	165	≥31
		99.5	220	≥40
		99.0	280	≥45
		98.0	335	≥46
		97.0	375	≥48
CMS-240	0.6	99.99	70	≥21
		99.9	130	≥31
		99.5	190	≥40
		99.0	285	≥45
		98.0	305	≥46
		97.0	370	≥48
	0.8	99.99	92	≥21
		99.9	180	≥31
		99.5	240	≥40
		99.0	305	≥45
		98.0	365	≥46
		97.0	410	≥48
CMS-260	0.6	99.99	78	≥21
		99.9	145	≥31
		99.5	210	≥40
		99.0	315	≥45
		98.0	335	≥46
		97.0	405	≥48
	0.8	99.99	100	≥21
		99.9	200	≥31
		99.5	260	≥40
		99.0	335	≥45
		98.0	405	≥46
		97.0	450	≥48