Birla Institute of Technology and Science

About: Birla Institute of Technology and Science is a education organization based out in Pilāni, Rajasthan, India. It is known for research contribution in the topics: Computer science & Population. The organization has 8897 authors who have published 13947 publications receiving 170008 citations.

Biochar: a sustainable solution

Abstract: The planet Earth has been thronged by a horde of threatening issues since the late twentieth century. Climate change, fossil fuel depletion and various types of pollution, including heavy metal pollution, have hit the humanity hard. Application of biochar has been emerged as a viable option to tackle heavy metal pollution. Biochar is a carbonaceous product obtained on pyrolysing any substance containing biomass. The chemico-physical properties of biochar depend on the type of feedstock used and the pyrolysis temperature involved in its production. Its remarkable properties of high porosity, large surface area, surplus surface functional groups and high adsorption capacity make it an excellent substrate for removing heavy metals from contaminated soil and water. At the same time, it can also tackle the emerging issues of climate change, by sequestering carbon, curtail depleting fossil fuels via bio-oil and syngas production, and it turns out to be a cheap and eco-friendly method. Due to such wide ranging applications, the review was conceptualized to determine whether biochar can be a sustainable solution to deal with the various threatening issues. The review focuses upon production, properties and applications of biochar showing that it can help in partial achievement of multiple sustainable development goals.​

Mechanistic cutting force modelling for micro-drilling of CFRP composite laminates

Abstract: This article presents a mechanistic model to predict thrust force and torque in micro-drilling of carbon fibre-reinforced plastic (CFRP) composite laminates. Tool edge radius effects are considered in this model to predict cutting forces even at low feed values which are comparable to the tool edge radius. As greater fluctuation of cutting force is very common in micro scale machining of composite material due to its layered structure, fabric plies and epoxy resin matrix layers are considered in this model as separate phases rather than as equivalent homogeneous material. Separate sets of cutting coefficients for each phase are determined from the experimental results. The fluctuations of average thrust and torque in alternate layers of fabric plies and epoxy resin matrix are predicted and validated with new experimental results of micro-drilling with a 0.5 mm diameter tungsten carbide tool. In both layers, the model predictions are close to the experimental results. Though the prediction errors in epoxy resin matrix are comparatively higher than the errors in fabric plies, these are reasonable considering the complex sub surface damage mechanism due to epoxy resin matrix failure and interfacial debonding.