Process Intensification in Chemical Reaction Engineering

In the present review article, the definitions and the most advanced findings within Process Intensification are collected and discussed. The intention is to give the readers the basic concepts, fixing the syllabus, as well as some relevant application examples of a discipline that is well-established and considered a hot topic in the chemical reaction engineering field at present.

Regioselective Enzymatic Synthesis of Kojic Acid Monoesters

Kojic acid is a fungal metabolite and one of the strongest tyrosinase inhibitors. Its esters are used as lipid-compatible skin whitening components in cosmetic formulations. In this study, lipase PS, lipase AK, Lipolyve AN and pig pancreatic lipase catalyzed the acetylation of kojic acid under selective formation of the same product, kojic 7-acetate. However, the enzymes differed in their regioselectivity when catalyzing the alcoholysis of kojic acid diacetate. While lipase PS and lipase AK produced mixtures of both monoacetate regioisomers (7-acetate and 5-acetate of kojic acid), the pancreatic lipase almost exclusively produced 5-acetate. The enzyme displayed the same regioselectivity in the palmitoylation of kojic acid and in the alcoholysis of kojic acid dipalmitate. Simple reaction engineering with PPL as a catalyst thus provides the complementary monoesters of kojic acid. Kojic 7-acetate, 5-acetate, 7-palmitate and 5-palmitate were prepared with yields after purification of 57.3%, 38.2%, 31.7% and 31.4%, respectively.

Preface

2021 International Conference on Fluid and Chemical Engineering (ICFCE 2021) was scheduled to be held in Wuhan, China during October 29-30, 2021. Due to the continuing effect of Covid-19 epidemic, after the discussion of the conference committee, ICFCE 2021 will be postponed to be held on 19th November 2021 as an online conference. Organized by Hubei Zhongke Institute of Geology and Environment Technology, ICFCE 2021 intends to invite worldwide famous scientists, experts, scholars, and researchers for academic presentations. ICFCE 2021 proceeding is a collection of outstanding submissions in the field of biofluid mechanics, chemically reacting fluids and combustion, computational fluid dynamics (CFD), experimental fluid mechanics, flow through porous media, fluidsolid interactions (FSI), geophysical fluid dynamics, granular/suspension flows, heat and mass transfer, hydrodynamics, physical, theoretical and computational chemistry, chemical engineering fundamentals, chemical reaction engineering, chemical engineering equipment design and process design, thermodynamics, catalysis & reaction engineering, particulate systems, crystallization, etc. 28 articles were selected from 58 submissions after peer-review, and authors participated in ICFCE 2021 with oral presentations and posters, promoting the communication among researchers and experts from institutes and universities, including Dalian University of Technology, Liaoning University of Technology School of Mechanical Engineering and Automation, University of Science and Technology of China, China North Engine Research Institute, etc. Cordial gratitude is delivered to Technical Program Committee of ICFCE 2021 for the professional work on guarantying the high standard of conference as well as the proceedings. We believe the proceedings will enhance the exchange of ideas and state-of-art knowledge on Fluid and Chemical Engineering. List of Technical Committee, Chair, Editor, International Committee Members are available in this pdf.