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One-pot synthesis of high fructose corn syrup directly from starch with SO42−/USY solid catalyst
Yong Sun,Caixia Xiong,Huihui Chen,Xianhai Zeng,Xing Tang,Tingzhou Lei,Lu Lin 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.7
An efficient process was developed for the conversion of starch directly into high fructose corn syrup (HFCS) by using SO4 2−/USY solid catalyst in water. The SO4 2−/USY catalyst was found to act as a bifunctional catalyst with high activity for both hydrolysis of starch and isomerization of glucose, achieving a one-step preparation path of HFCS from starch. An optimal HFCS yield, containing 58.34% glucose and 27.84% fructose (mass fraction), was obtained at 150 oC for only 1 h.
Soy Protein Isolate As Fluid Loss Additive in Bentonite–Water-Based Drilling Fluids
Li, Mei-Chun,Wu, Qinglin,Song, Kunlin,Lee, Sunyoung,Jin, Chunde,Ren, Suxia,Lei, Tingzhou American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.44
<P>Wellbore instability and formation collapse caused by lost circulation are vital issues during well excavation in the oil industry. This study reports the novel utilization of soy protein isolate (SPI) as fluid loss additive in bentonite–water based drilling fluids (BT-WDFs) and describes how its particle size and concentration influence on the filtration property of SPI/BT-WDFs. It was found that high pressure homogenization (HPH)-treated SPI had superior filtration property over that of native SPI due to the improved ability for the plugging pore throat. HPH treatment also caused a significant change in the surface characteristic of SPI, leading to a considerable surface interaction with BT in aqueous solution. The concentration of SPI had a significant impact on the dispersion state of SPI/BT mixtures in aquesous solution. At low SPI concentrations, strong aggregations were created, resulting in the formation of thick, loose, high-porosity and high-permeability filter cakes and high fluid loss. At high SPI concentrations, intercatlated/exfoliated structures were generated, resulting in the formation of thin, compact, low-porosity and low-permeability filter cakes and low fluid loss. The SPI/BT-WDFs exhibited superior filtration property than pure BT-WDFs at the same solid concentraion, demonstrating the potential utilization of SPI as an effective, renewable, and biodegradable fluid loss reducer in well excavation applications.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-44/acsami.5b07883/production/images/medium/am-2015-07883j_0012.gif'></P>
Huai Liu,Xuejuan Cao,Ting Wang,Junnan Wei,Xing Tang,Xianhai Zeng,Yong Sun,Tingzhou Lei,Shijie Liu,Lu Lin 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The conversion of concentrated 5-hydroxymethylfurfural (HMF) or fructose to 2,5-furandicarboxylic acid(FDCA), a renewable alternative to petroleum-derived terephthalate acid, is highly desirable butchallenging for FDCA production in an industrial scale. In this contribution, DMSO/H2O mixture wasdemonstrated as an effective medium for the production of FDCA from high concentration of HMF orfructose. For example, FDCA yield up to 93% was achieved at 10 wt% HMF concentration in DMSO/H2Oover commercially available Ru/C (2 equiv. NaHCO3, 130 C, 4 MPa O2 and 12 h). Furthermore, an overallFDCA yield of 65% was achieved from concentrated fructose (19 wt%) through a facile two-step process. Notably, it is so far the highest HMF or fructose concentration employed for FDCA formation. As comparedto pure water or DMSO, DMSO/H2O mixed system is able to stabilize HMF in an alkaline environment,which allows the efficient oxidation of HMF at high concentrations.
Ting Wang,Junnan Wei,Huai Liu,Yunchao Feng,Xing Tang,Xianhai Zeng,Yong Sun,Tingzhou Lei,Lu Lin 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
2, 5-Bishydroxymethylfuran (BHMF) has been currently emerged as a promising biomass-derivedmonomer. It is highly desirable to proceed a chemical process at a high substrate concentration, by whicha facile and cost-effective separation of products can be expected. Herein, we report for thefirst time onthe hydrogenation of highly concentrated 5-hydroxymethylfurfural (HMF) in deep eutectic solvents(DESs), giving a near quantitative selectivity towards BHMF in ChCl-glycerol DES at 25 C in 3 h usingNaBH4 as the H-donor. DES is hailed as a new class of green solvent, in which HMF/BHMF could bestabilized by the strong hydrogen-bond interaction, and allowed the selective hydrogenation of HMF athigh concentration up to 40 wt%. Notably, the resulting BHMF could be facilely separated by extractionwith ethyl acetate, and then high purity of BHMF with a desirable isolated yield around 80% was obtainedafter removing of ethyl acetate. Additionally, the reaction efficiency of HMF hydrogenation in DESs wasverified to be strongly associated with the viscosity of DESs and the pKa value of hydrogen-bonding donor.
Calculating Method Study and Parameter Analysis of Slender LCFST Columns Under Axial Loading
Ting Zhou,Ziyang Ren,Baoqi Jiang,Minyang Xu,Zhiyong Lei,Zhi-Hua Chen 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.5
L-shaped columns composed of concrete-fi lled steel tubes (LCFST columns) connected by steel plates, which are important component to make sure the mono-column working together, were investigated under axial loading experiment with diff erent width and thickness of connection plates. The relationships between load and longitudinal displacement, lateral displacement, longitudinal strains and transverse strains as well as failure mode are presented. Load carrying capacity of LCFST columns increased with the width and thickness of the connection plates increasing. In addition, the integrity of the specimen was improved with increase of thickness and decrease of width of the connection plates. Failure modes obtained from the fi nite element model were consistent with the phenomenon observed in the test. Besides, the parameters of slenderness ratio, dimensions of connection plate, and transverse stiff ener spacing were analyzed. Finally, the calculating method of yield bearing capacity of axial compression was proposed based on the former analysis.