Thermochemical conversion of carbonaceous materials (Gasification, Pyrolysis, Combustion),
Energy Economics and Management,
Modelling of Thermal System
22
Scopus Publications
Scopus Publications
Process optimization of rice straw-derived activated biochar and biosorption of heavy metals from drinking water in rural areas Anil Kumar Sakhiya, Priyanka Kaushal, Virendra Kumar Vijay Applied Surface Science Advances, 2023 The Indo-Gangetic plain of northern India is known for prevalent rice farming. Due to the lack of a rice straw waste management system, a large volume of rice straw is burned in the field. Therefore, we add value to rice straw by converting it into activated biochar and utilizing it to remove toxic metals from natural water. In this work, single-step physical activation (CO2 and H2O) of rice straw was planned and optimized the activation process parameters to get better biochar yield and surface area. The biochar activation parameters were optimized using the central composite design method. The CO2 activated biochar has an optimum surface area and product yield of 399.99 m2/g and 26.79 %, whereas H2O activated biochar has an optimum product yield and surface area of 31.53 % and 300 m2/g. The SEM analysis shows that CO2 activated biochar has a more uniform porous structure than H2O activated biochar. Cost analysis revealed that CO2 and H2O activated biochar had a lower manufacturing cost of 1.287 and 1.672 U.S. $/kg, respectively compared to other adsorbents. Arsenic and manganese removal efficiency in natural water was found to be greater than 95 % for both activated biochar.
Potential of rice straw derived activated biochar to remove arsenic and manganese from groundwater: A cleaner approach in the Indo-Gangetic Plain Anil Kumar Sakhiya, Priyanka Kaushal, Virendra Kumar Vijay Applied Surface Science Advances, 2023 Heavy metal pollution in groundwater has become a public health concern due to its non-degradable and poisonous nature. Several research studies were conducted using various adsorbents to extract heavy metals from water. However, the removal of As and Mn using rice straw-derived activated biochar in a binary metal system was found to be limited. This study examined a comparative analysis of As and Mn adsorption by CO2-activated biochar derived from rice straw in a single and binary metal approach. Findings showed that the maximal sorption capacity of As and Mn in single metal systems was 18.26 and 12.18 mg g−1 and 8.51 and 5.42 mg g−1 in binary metal systems. PSO kinetic model (R2> 0.99) and Langmuir isotherm model (R2> 0.95) show good agreement with experimental data. The highest removal efficiency of As (99.53%) and Mn (96.23%) was achieved in naturally contaminated water (Sahibganj, India). Health risk assessment indicates chances of cancer (CR> 1 × 10−4 and HQ>1) in humans due to the high concentration of As (192 μg L−1). Water treated with 0.1 g activated biochar had lower CR and HQ values, and metal concentration was below the WHO safe drinking water standard.
Assessment of electricity generation potential from biochar in Northern India Abhijeet Anand, Anil Kumar Sakhiya, Imlisongla Aier, Ujjiban Kakati, Vivek Kumar, Priyanka Kaushal Energy and Climate Change, 2022 Environment-friendly rice and wheat straw management in the Indian states of Punjab and Haryana have been a significant challenge. Farmers have adopted in-situ burning of crop residues as it is almost out of no pocket expense. However, this practice amounts to releasing 42.32 MT hazardous pollutants and GHGs into the atmosphere, which has an estimated 58.62 MT CO2e GWP. The present study considered biochar conversion of surplus rice and wheat straw through slow pyrolysis to investigate biochar compatibility for cofiring with coal in power plants. Rice straw derived biochar produced at 400 °C, and wheat straw derived biochar produced at 500 °C were found most suitable for cofiring and electricity generation. It was estimated that about 10.53 MT high quality coal grade biochar could be produced from 28.35 MT of surplus rice and wheat straw in Punjab and Haryana, which has an estimated 19.80 TWh electricity generation potential. Also, electricity generation from biochar would reduce pollutant emissions imparting 30.25 MT CO2e GWP. The results of this study could provide baseline data for fuel replacement in power plants.
Ultrafast growth of carbon nanotubes using microwave irradiation: characterization and its potential applications Paramjeet Baghel, Anil Kumar Sakhiya, Priyanka Kaushal Heliyon, 2022 Carbon nanotubes (CNTs) have been studied for more than twenty-five years due to their distinguishing features such as high tensile strength, high elastic module, high surface area, high thermal and electrical conductivity, making them ideal for a variety of applications. Nanotechnology and nanoscience researchers are working to develop CNTs with appropriate properties for possible future applications. New methodologies for their synthesis are clearly needed to be developed and refined. In this research, the authors look at the history and the recent developments of carbon nanotubes synthesis methods for CNTs, such as arc discharge, laser ablation, chemical vapour deposition and microwave irradiation. New immerging methods like microwave irradiation for the growth of CNTs and their composite was extensively reviewed. Low temperature and ultrafast growth of CNT through microwave irradiation technique were examined and discussed. In addition, all the techniques used for the CNTs characterization were also briefly discussed. Special attention was dedicated to the application of CNTs. This review has extensively explored future applications in the biomedical sector, industrial water purifications, CNTs composites, energy and storage devices.
Modelling approaches to renewable energy sources for rural energy systems in India: a review and case study Imlisongla Aier, Abhijeet Anand, Anil Kumar Sakhiya, Priyanka Kaushal, Virendra Kumar Vijay International Journal of Ambient Energy, 2022 Due to the growing demand for energy in rural regions, energy models have been identified as critical drivers in planning, designing, and implementing suitable energy technologies. The current study suggests that geographical location plays a crucial role in the availability of renewable energy sources. From the comprehensive review of single, hybrid and integrated energy system models developed for rural areas of India, it was concluded that integrated renewable energy system models provided a reliable source of power. Energy models with single renewable source options proved unreliable power sources and required backup from batteries or a grid. Conversely, renewable energy models proved to be most cost-effective at locations where grid power supply was not available. The authors presented a case study of Chumukedima village of Dimapur district in Nagaland (India) using HOMER software. Findings from the study could be incorporated to address concurrent concerns of energy systems modelling in rural areas.
Sustainable utilization of paddy straw in punjab for biochar production: Estimating the energy and emission potential International Energy Journal, 2021
