patent count increases slowly, showing negative growth in some years. The average
annual growth rate (AAGR) is 2.6%. The annual average is approximately 133 patents. In the sharply increasing phase after 2006, the annual patent count increases
quickly; the AAGR is 23.8% from 2006 to 2013. This phase presents a linear
Table 8.3 Thesaurus descriptions of search IPC codes
IPC codes
Thesaurus descriptions
1
B01D-000/
00
Separation
2
B01D-053/
00
Separation of gases or vapors; recovering vapors of volatile solvents from
gases
3
B01D-053/
02
By adsorption
4
B01D-053/
04
With stationary adsorbents
5
B01D-053/
14
By absorption
6
B01D-053/
18
Absorbing units; liquid distributors therefore
7
B01D-053/
22
By diffusion
8
B01D-053/
78
With gas-liquid contact
9
B01D-053/
86
Catalytic processes
10 B01D-053/
94
By catalytic processes
11 C01B-003/
38
Using catalysts
12 C01B-031/
20
Carbon dioxide
13 F23J-015/
00
Arrangements of devices for treating smoke or fumes
14 F25J-001/
00
Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
15 F25J-003/
00
Processes or apparatus for separating the constituents of gaseous mixtures
involving the use of liquefaction or solidification
16 F25J-003/
02
By rectification, i.e., by continuous interchange of heat and material between a
vapor stream and a liquid stream
17 F25J-003/
04
For air
18 F25J-003/
08
Separating gaseous impurities from gases or gaseous mixtures
19 H01M008/04
Auxiliary arrangements or processes, e.g., for control of pressure, for circulation of fluids
20 H01M008/06
Combination of fuel cell with means for production of reactants or for
treatment of residues
8 Spatial-Temporal Distribution of Carbon Capture Technology According to Patent. . .
159