Research dynamic analysis of valorizing straw waste for 5-hydroxymethylfurfural based on bibliometrics
Based on the Web of Science database,this paper searched and counted the literature on the high-value conversion of straw waste into 5-hydroxymethylfurfural(HMF)from 2000 to 2021.VOSviewer and CiteSpace software were used to visually analyze the keywords by co-occurrence and burst detection about high-value conversion from straw waste into HMF.The results show that the total number of papers in the field of preparing HMF from straw waste shows an upward trend between 2000 and 2021.China and the Chinese Academy of Sciences are the country and the research institution,respectively,with the largest number of papers in this field,but the published articles from the USA have much influence and competitiveness.The top ten research directions tend to use chemical means for the engineering application of energy fuels,aiming to solve the two global problems of agricultural solid waste and energy crisis at the same time of a high scientific research level and academic value.The top papers cited in the field of high-value conversion of straw waste into HMF mainly focus on the research of pretreatment methods,catalyst/catalyst systems,and synthesis mechanisms of straw-like biomass.In the past 20 years,the research focuses at home and abroad mainly on the pretreatment of straw waste,the core technology of high-value conversion of HMF,and the potential improvement strategy for preparing HMF.Pretreatment is applied to reduce the crystallinity of cellulose or lignin and improve the conversion to HMF.The conversion to HMF can be controlled by the factors of temperature,pressure,and water properties,and the yield should be enhanced by investigating the effective and orienting catalyst and solvent.However,there are still some problems in the development of this field,such as low HMF yield,high pretreatment cost,separation and purification difficulties,and industrialization difficulties,which need further development and exploration.According to the analysis of the development context and salient words of the research topic,the research focus in this field may be extended to the preparation of liquid fuels,fine chemicals,etc.