# Additive Manufacturing and Chemical Engineering: Looking for Synergies from a Bibliometric Study
## 3 Results and Discussion
### Bibliometric Performance Analysis
#### 3.1.2 Publication Distribution of Countries and Institutions
These include countries with long-standing research traditions in industrial technologies, such as South Korea (86 documents, 2.3% contribution) and Japan (83 documents, 2.2% contribution), as well as emerging actors in the research landscape, such as Singapore (109 documents, 2.9% contribution) and Malaysia (70 documents, 1.9% contribution). Furthermore, a highly populated country like India (283 documents, 7.5% contribution) has also made notable contributions, ranking fifth in the overall ranking. Indeed, India has been identified as the next knowledge superpower with the potential to attain the levels of the United States and China before 2050 due to its sustained efforts in scientific research and development programs [40]. The research \begin{table}
\begin{tabular}{l c c} \hline
**Country** & **Publications** & **Contribution (\%)** \\ \hline United States & 887 & 23.58 \\ China & 569 & 15.13 \\ Germany & 374 & 9.94 \\ Italy & 298 & 7.92 \\ India & 283 & 7.52 \\ United Kingdom & 278 & 7.39 \\ Australia & 144 & 3.83 \\ Spain & 117 & 3.11 \\ Singapore & 109 & 2.90 \\ France & 108 & 2.87 \\ Canada & 89 & 2.37 \\ South Korea & 86 & 2.29 \\ Japan & 83 & 2.21 \\ Netherlands & 81 & 2.15 \\ Poland & 80 & 2.13 \\ Russian Federation & 78 & 2.07 \\ Malaysia & 70 & 1.86 \\ Austria & 67 & 1.78 \\ Switzerland & 67 & 1.78 \\ Belgium & 60 & 1.60 \\ Portugal & 57 & 1.52 \\ Turkey & 53 & 1.41 \\ Brazil & 52 & 1.38 \\ \hline \end{tabular}
\end{table} 
Table 5: The top 23 most productive countries (at least 52 documents). conducted to facilitate a greener transition is based on technological innovation, including additive manufacturing [41]. The analysis in Table 6, which summarizes the most productive institutions, revealed that the Nanyang Technological University was the most prominent institution, with 60 documents, representing 1.6% of the total. This demonstrated that the scientific production on this topic was highly shared among different institutions. This university, located in Singapore, is one of the most appreciated institutions engaged in research and development in the field of additive manufacturing. It possesses a specialized center in this domain, the Singapore Centre for 3D Printing, which is listed as an independent institution in Table 6 with 33 documents and a 0.88% contribution. The institution engages in research and innovation projects pertaining to a multitude of applications of additive manufacturing, including biofabrication, aerospace equipment, sustainable construction, and innovative electronics. Indeed, the School of Mechanical and Aerospace Engineering from Nanyang Technological University also appeared among the most prolific institutions, with 49 documents (1.3% contribution). Furthermore, another Singaporean university was also present in the ranking: the National University of Singapore, which produced 28 documents (0.74% contribution). These institutions are part of Singapore's additive manufacturing ecosystem, which is characterized by academic excellence, interdisciplinary collaboration, and strong links with the industrial sector [42]. The second-ranked entity was the Chinese Ministry of Education, which published 59 documents, representing a 1.57% contribution to the total. Another notable Chinese governmental institution is the Chinese Academy of Sciences, which occupies the fifth position in the ranking with 48 documents. These two institutions are critical within the Chinese research framework. On the one hand, the Chinese Ministry of Education is the primary source of funding for national universities and colleges in China, with 75 affiliated