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A Study of Upgrading Real Biogas via CO2 Precipitation Route Under Indian Scenario
( Avneesh Kumar Gehlaut ),( Ankur Gaur ),( Shabih Ul Hasan ),( Jin-wonpark ) 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.3
Our study focuses on upgrading real biogas obtained under Indian scenario using carbon capture and utilization (CCU) technology to remove carbon dioxide (CO<sub>2</sub>) and utilize it by forming metal carbonate. Amines such as monoethanolamine (MEA), diethanolamine (DEA), and sodium hydroxide (NaOH) were used to rapidly convert gaseous CO<sub>2</sub> to aqueous CO<sub>2</sub>, and BaCl<sub>2</sub> was used as an additive to react with the aqueous CO<sub>2</sub> and rapidly precipitating the aqueous CO<sub>2</sub>. All experiments were conducted at 25 ºC and 1 atm. We analyzed the characteristics of the BaCO<sub>3</sub> precipitates using X-ray diffractometry (XRD), scanning electron microscopy - Energy dispersive spectroscopy (SEM-EDS) and Fourier-transform infrared spectroscopy (FT-IR) analyses. The precipitates exhibited witherite morphology confirmed by the XRD results, and FT-IR confirmed that the metal salt formed was BaCO<sub>3</sub>, and EDS showed that there were no traces of impurities present in it. The quantity of the BaCO<sub>3</sub> was larger when formed with DEA. Also, a comparison was done with a previous study of ours conducted in Korean conditions. Finally, we observed that the carbonate obtained using real biogas showed similar properties to carbonates available in the market. An economic analysis was done to show the cost effectiveness of the method employed by us.
Himanshu Gupta,Harish Kumar,Mohit Kumar,Avneesh Kumar Gehlaut,Ankur Gaur,Sadhana Sachan,Jin-Won Park 대한환경공학회 2020 Environmental Engineering Research Vol.25 No.4
The current study stresses on the reuse of waste lignocellulose biomass (rice husk and sugarcane bagasse) for the synthesis of carboxymethyl cellulose (CMC) and further conversion of this CMC into a biodegradable film. Addition of commercial starch was done to form biodegradable film due to its capacity to form a continuous matrix. Plasticizers such as Glycerol and citric acid were used to provide flexibility and strength to the film. Biopolymer film obtained from sugarcane bagasse CMC showed maximum tensile strength and elongation in comparison to the film synthesized from commercial CMC and CMC obtained from rice husk. It has been observed that an increase in sodium glycolate/NaCl content in CMC imposed an adverse effect on tensile strength. Opacity, moisture content, and solubility of the film increased with a rise in the degree of substitution of CMC. Therefore, CMC obtained from sugarcane bagasse was better candidate in preparing biopolymer/biocomposite film.
Facile Synthesis of Bio-Composite Films Obtained from Sugarcane Bagasse and Cardboard Waste
Sanjeev Makin,Satish Kumar Singh,Sweety Verma,Himanshu Gupta,Avneesh Kumar Gehlaut,Suantak Kamsonlian,Surya Narain Lal,Ankur Gaur 한국화학공학회 2023 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.61 No.4
In this study, we focus on the recycling of cardboard waste and sugarcane bagasse (SCB) for the preparation of carboxymethyl cellulose (CMC) and its conversion into a biodegradable film. Sodium alginate (SA) was added to form a biodegradable composite film. SA was used to increase film permeability. Glycerol, which is a plasticizer, was used to increase the tensile strength (TS) and film expansion. To characterize the CMC, X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy were used. The addition of olive oil to the CMC-SA matrix highlighted its antimicrobial property against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). A slight decrease in tensile strength was observed with the addition of olive oil (OO), which improved the functional properties of the control films as well as lowered moisture content and water solubility. But considering all other factors, the composite films obtained from sugarcane bagasse and cardboard waste incorporated with olive oil are suitable for applications in the field of food packaging.