1 Introduction
Fig. 1 Average temperature rise since 1880 [33] |
2 Materials and methods
Table 1 Search criteria |
Technology | Search |
---|---|
Absorption | (KP = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND KP = (“absorption” OR “absorbent” OR “absorb”)) OR (TI = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND TI = (“absorption” OR “absorbent” OR “absorb”)) OR (AK = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND AK = (“absorption” OR “absorbent” OR “absorb”)) |
Adsorption | (KP = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND KP = (“adsorption” OR “adsorbent” OR “adsorb”)) OR (TI = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND TI = (“adsorption” OR “adsorbent” OR “adsorb”)) OR (AK = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND AK = (“adsorption” OR “adsorbent” OR “adsorb”)) |
Membrane | (KP = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND KP = (“membrane”)) OR (TI = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND TI = (“membrane”)) OR (AK = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND AK = (“membrane”)) |
Hybrid Processes | (KP = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND KP = ((“hybrid”) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“membrane”)) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“adsorption” OR “adsorbent” OR “adsorb”)) OR ((“adsorption” OR “adsorbent” OR “adsorb”) AND (“membrane”)))) OR (TI = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND TI = ((“hybrid”) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“membrane”)) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“adsorption” OR “adsorbent” OR “adsorb”)) OR ((“adsorption” OR “adsorbent” OR “adsorb”) AND (“membrane”)))) OR (AK = (“carbon capture” OR “CO2 capture” OR “carbon-capture” OR “CO2-capture”) AND AK = ((“hybrid”) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“membrane”)) OR ((“absorption” OR “absorbent” OR “absorb”) AND (“adsorption” OR “adsorbent” OR “adsorb”)) OR ((“adsorption” OR “adsorbent” OR “adsorb”) AND (“membrane”)))) |
3 Results and discussion
3.1 Overview of information
Table 2 Summary of the main information about the technologies |
MAIN INFORMATION ABOUT DATA | |||||
---|---|---|---|---|---|
Adsorption | Absorption | Membrane | Hybrid Processes | Combined | |
Timespan | 2002:2020 | 1997:2020 | 2003:2020 | 2004:2020 | 1997:2020 |
Sources (Journals, Books, etc) | 313 | 215 | 145 | 141 | 433 |
Documents | 1877 | 1227 | 680 | 396 | 4180 |
Average years from publication | 4.58 | 4.89 | 5.14 | 4.71 | 4.77 |
Average citations per documents | 34.71 | 24.6 | 28.5 | 26.65 | 29.97 |
Average citations per year per document | 5.43 | 3.798 | 4.35 | 4.37 | 4.672 |
References | 42,743 | 25,827 | 17,528 | 13,942 | 75,300 |
DOCUMENT TYPES | |||||
article | 1825 | 1159 | 652 | 377 | 4013 |
article; proceedings paper | 52 | 68 | 28 | 19 | 167 |
DOCUMENT CONTENTS | |||||
Keywords Plus (ID) | 3125 | 2038 | 1501 | 1222 | 5084 |
Author’s Keywords (DE) | 3142 | 2493 | 1612 | 1047 | 6216 |
Keywords Plus per Document | 1.66 | 1.66 | 2.21 | 3.09 | 1.22 |
AUTHORS | |||||
Authors | 4941 | 3091 | 1897 | 1327 | 8409 |
Author Appearances | 9086 | 5452 | 3109 | 1765 | 19,412 |
Authors of single-authored documents | 13 | 17 | 10 | 11 | 33 |
Authors of multi-authored documents | 4928 | 3074 | 1887 | 1316 | 8376 |
AUTHORS COLLABORATION | |||||
Single-authored documents | 16 | 23 | 12 | 13 | 64 |
Documents per Author | 0.38 | 0.38 | 0.36 | 0.30 | 0.50 |
Authors per Document | 2.63 | 2.52 | 2.79 | 3.35 | 2.01 |
Co-Authors per Documents | 4.84 | 4.44 | 4.57 | 4.46 | 4.64 |
Collaboration Index | 2.65 | 2.55 | 2.82 | 3.44 | 2.03 |
Fig. 2 Articles by technology |
Fig. 3 Citations by technology |
3.2 General trends
Fig. 4 Keyword trend (keyword plus) |
Fig. 5 Keyword growth trend |
Fig. 6 Phrase trend |
3.3 Scientific productivity
Fig. 7 Adsorbent, productivity and citations |
Fig. 8 Absorbent, productivity and citations |
Fig. 9 Membrane, productivity and citations |
Fig. 10 Hybrid, productivity and citations |
Fig. 11 Combined, productivity and citations |
3.4 Journal analysis
Table 3 Top three journal sources for each category |
Journal Source | ||
---|---|---|
Sources | Number of Articles | |
Adsorption | CHEMICAL ENGINEERING JOURNAL | 113 |
INDUSTRIAL \& ENGINEERING CHEMISTRY RESEARCH | 101 | |
MICROPOROUS AND MESOPOROUS MATERIALS | 65 | |
Absorption | INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL | 194 |
APPLIED ENERGY | 71 | |
INDUSTRIAL \& ENGINEERING CHEMISTRY RESEARCH | 71 | |
Membranes | JOURNAL OF MEMBRANE SCIENCE | 129 |
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL | 54 | |
SEPARATION AND PURIFICATION TECHNOLOGY | 42 | |
Hybrid Processes | INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL | 22 |
APPLIED ENERGY | 20 | |
ENERGY | 18 |
Fig. 12 Combined, no articles produced based on journal sources |
Table 4 Journal index rankings, base technologies |
Journal Source | H_index | G_index | M_index | TC | NP | |
---|---|---|---|---|---|---|
Adsorption | ACS APPLIED MATERIALS \& INTERFACES | 27 | 51 | 2.70 | 2706 | 60 |
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 16 | 36 | 1.14 | 1334 | 49 | |
AICHE JOURNAL | 16 | 22 | 1.07 | 932 | 22 | |
Absorption | APPLIED ENERGY | 29 | 43 | 2.64 | 2135 | 71 |
APPLIED THERMAL ENGINEERING | 11 | 17 | 1.10 | 290 | 17 | |
ACS SUSTAINABLE CHEMISTRY \& ENGINEERING | 8 | 12 | 1.60 | 177 | 12 | |
Membrane | ACS APPLIED MATERIALS \& INTERFACES | 11 | 15 | 1.10 | 482 | 15 |
APPLIED ENERGY | 10 | 14 | 0.91 | 535 | 14 | |
AICHE JOURNAL | 7 | 11 | 0.47 | 207 | 11 | |
Hybrid Technologies | APPLIED ENERGY | 13 | 20 | 1.30 | 620 | 20 |
ACS APPLIED MATERIALS \& INTERFACES | 8 | 10 | 0.80 | 313 | 10 | |
APPLIED THERMAL ENGINEERING | 5 | 6 | 0.31 | 111 | 6 |
Table 5 Combined, journal source indices |
Journal Source | H_index | G_index | M_index | TC | NP |
---|---|---|---|---|---|
ACS APPLIED MATERIALS \& INTERFACES | 31 | 58 | 3.1 | 3689 | 92 |
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 17 | 36 | 1.21 | 1371 | 52 |
ACS SUSTAINABLE CHEMISTRY \& ENGINEERING | 17 | 26 | 2.43 | 813 | 43 |
ADVANCED FUNCTIONAL MATERIALS | 9 | 10 | 0.82 | 618 | 10 |
ACS OMEGA | 7 | 13 | 1.17 | 179 | 13 |
3.5 Lotka’s law
Fig. 13 Adsorption, Lotka’s Law |
Fig. 14 Absorption, Lotkas Law |
Fig. 15 Membranes, Lotkas Law |
Fig. 16 Hybrid, Lotkas Law |
Fig. 17 Combined, Lotkas Law |
3.6 Country analysis
Fig. 18 Adsorbents, top contributing countries |
Fig. 19 Absorbent, top contributing countries |
Fig. 20 Membrane, top contributing countries |
Fig. 21 Hybrid, top contributing countries |
Fig. 22 Combined, top contributing countries |
Fig. 23 Author nationality split |
Fig. 24 Adsorbent, top cited countries |
Fig. 25 Absorbent, top cited countries |
Fig. 26 Membrane, top cited countries |
Fig. 27 Hybrid, top cited countries |
Fig. 28 Combined, top cited countries |
Fig. 29 Adsorption, country collaboration map |
Fig. 30 Absorption, country collaboration map |
Fig. 31 Membrane, country collaboration map |
Fig. 32 Hybrid, country collaboration map |
Fig. 33 Combined, country collaboration map |
Fig. 34 Adsorbent, country collaboration map |
Fig. 35 Absorbent, country collaboration map |
Fig. 36 Membrane, country collaboration map |
Fig. 37 Hybrid, country collaboration map |
Fig. 38 Combined, country collaboration map |
Fig. 39 Country authorship types |
3.7 Keyword/phrase analysis
Fig. 40 Adsorbent, top keywords (keyword Plus) |
Fig. 41 Absorbent, top keywords (keyword Plus) |
Fig. 42 Membrane, top keywords (keyword Plus) |
Fig. 43 Hybrid, top keywords (keyword Plus) |
Fig. 44 Combined, top keywords (keyword Plus) |
Fig. 45 Adsorbent, top key phrases |
Fig. 46 Absorbent, top key phrases |
Fig. 47 Membrane, top key phrases |
Fig. 48 Hybrid, top key phrases |
Fig. 49 Combined, top key phrases |
3.7.1 Keyword co-occurrence
Fig. 50 Adsorbent, keyword co-network |
Fig. 51 Absorbent, keyword co-network |
Fig. 52 Membrane, keyword co-network |
Fig. 53 Hybrid, keyword co-network |
Fig. 54 Combined, keyword co-network |