Abstract
The application of low-carbon alcohols (LCA fuels) in internal combustion engines has become one of the most important topics in road transport decarbonization. This paper aims to identify the trends and characteristics of LCA combustion research for the period 2000-2021 through bibliometric analysis. Citation analysis is used to evaluate the influence of most productive journals, countries/regions, authors, institutions, and relevant literature, while collaborative network between various authors, countries/regions, institutions, and the co-occurrences among different keywords are discussed. A dataset of 2250 publications was extracted from the Web of Science Core database and analyzed with CiteSpace and Biblioshiny. The extracted documents involve 429 journals of publications by 4782 authors from 1434 institutions across 83 countries/regions. The results reveal that the research output in this field has undergone three main stages of development, i.e., initial development (2000-2007), slow development (2008-2015), and rapid development (2016-2021). Currently, the research field is growing at an annual growth rate of 9.24%, with most of the contributions by authors and institutions originating from China. The analysis from relevant keywords and literature suggests that the core of this research field centers on the combustion, performance, and emission characteristics of LCA-fueled engines. The current study helps keep the scientific community informed of the latest paradigms in the LCA combustion research field.
Highlights
The rapid depletion of fossil fuel reserves and its related-environmental pollution has accelerated the search for clean alternative fuels worldwide (Chen et al, 2013; Huang et al, 2016)
An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer in a combustion chamber that is an integral part of the working fluid flow circuit (Mayank et al, 2016)
Only articles and proceeding papers were used for the current study as previously done by Mao et al (Mao et al, 2015) because these types of documents provide more original research findings and include more information on authors and their affiliations. 99% of the refined documents were published in the English language
Summary
The rapid depletion of fossil fuel reserves and its related-environmental pollution has accelerated the search for clean alternative fuels worldwide (Chen et al, 2013; Huang et al, 2016). I.e., diesel and gasoline, the C1-C2 alcohols have excellent fuel properties such as high latent heat of vaporization, lower adiabatic flame temperature, oxygenated molecule, absence of C-C bonds, high oxygen content, lower viscosity, high H/C ratio, low sulfur content, and high evaporative cooling (Kim et al, 2020; Zhu et al, 2021). These collective attributes work together to reduce post-combustion emissions in neat or blended methanol/ethanol fuels
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