Manish Tiwari

• Ph.D. (Tech.),Chemical engg
• Professor (Assistant) at Mukesh Patel School of Technology management and Engineering, SKVM's NMIMS Deemed to be University

Friedel–Crafts alkylation and acylation reactions are ubiquitous in several industries and use highly polluting liquid acids as catalysts. Production of ketones and subsequently secondary alcohols is achieved by Friedel Crafts acylation using various acylating agents. Benzophenone and its family are used in intermediates, fine chemicals, dyes and p...

A series of (20% w/w) aluminium exchanged dodeca-tungstophosphoric acids (DTP) (Alx-DTP, x = 0.33-1) supported on montmorillonite K-10 clay were synthesized and completely characterized by sophisticated techniques. These catalysts were used for the selective benzoylation of diphenyl oxide with benzoic anhydride to a mono acylated product. Al0.66-DT...

Conversion of biomass into valuable chemicals is highly sought after. 5-Hydroxymethyl furfural (HMF) is a biobased platform chemical which can be valorised into fuels and chemicals. In the current work, HMF has been transformed into 2,5-dimethyl furan (2,5-DMF) using a number of catalysts amongst which a novel bifunctional metal-acid catalyst, pall...

Magnetically separable sulfated zirconia catalysts were prepared by a two-step approach. Coating of zirconia around the particles helps to increase the number of sites needed for sulfate ion loading and hence enhances the acidity of the catalyst. Different molar concentrations of chlorosulfonic acid were used for sulfonation. The prepared catalysts...

Glycerol esterification with acetic acid produces a mixture of mono-, di- and tri acetins, which are commercially important value-added products with wide range of industrial uses including their application as fuel-additives, thus contributing to environmental sustainability and economic viability of the bio-refinery concept. Glycerol esterificati...

The use of organic-inorganic hybrid nanoflowers as a support material for enzyme immobilization has gained significant attention in recent years due to their high stability, ease of preparation, and enhanced catalytic activity. However, a major challenge in utilizing these hybrid nanoflowers for enzyme immobilization is the difficulty in handling a...

Glycerol is a valuable feedstock, produced in biorefineries as a byproduct of biodiesel production. Esterification of glycerol with acetic acid yields a mixture of mono-, di-, and triacetins. The acetins are commercially important value-added products with a wide range of industrial applications as fuel additives and fine chemicals. Esterification...

Metal oxides have been used in several organic syntheses because of their unique properties and have emerged as a potential alternative to various industrial catalysts. Bare metal oxides have found direct applications as catalysts or are used as supports to make highly active catalysts. The organic reactions are usually carried out using solvents b...

Glycerol acetins (mono-, di-, and tri) are produced via esterification with acetic acid. The acetins are commercially important industrial chemicals including their application as fuel additives, thus significant to environmental sustainability and economic viability of the biorefinery industry. Glycerol esterification with acetic acid was studied...

The main aim of this research is to assess the consequences of natural and anthropogenic processes on the groundwater quality of 65 deep aquifers of Nagpur city, Maharashtra Province, India, using a unified multivariate statistical approach. The dominant groundwater type recognized is Ca–HCO3 (recharge waters) in 43.1 and 38.5% of groundwater sampl...

The manufacture of high-value products from biomass derived platform chemicals is becoming an integral part of the biorefinery industry. In this study, we demonstrate a green catalytic process using solvent free conditions for the synthesis of hydroxymethylfurfural (HMF) levulinate from HMF and levulinic acid (LA) over tin exchanged tungstophosphor...

The increase in biodiesel production has resulted in the oversupply of glycerol into the market. Purified and processed glycerol has found many direct applications in pharmaceuticals, food, etc. However, the cost of processing and market value of processed glycerol has driven the research of direct utilization of crude glycerol to industrially esse...

Aspects of designing a noninvasive tracking system for monitoring the select delivery and transplantation of bio-targeted agents in vivo have witnessed notable transformations in the recent past. Distinct nanoprobes have been developed and practiced for bioimaging tissues and treating diseases ranging from inflammatory and cardiovascular diseases t...

The ever-growing energy and chemical demand have resulted in the absurd usage of fossil fuels, which has led to a significant increase in the CO2 concentration in the environment. In recent times, the development of efficient methods for CO2 capture, sequestration, and utilization is one of the key research areas under exploration. The conversion o...

Synthetic dyes enhance the aesthetic value of the product, which has accelerated the use of synthetic colorants in almost all essential commodities including papers, textiles, foods, polymers, paints, and many more. However, these synthetic colorants need to be degraded concerning their adverse effects on the environment. Among many degradation pro...

Xenobiotic compounds are extraneous chemicals accumulated in the environment that are posing a threat to the biosphere. The highly recalcitrant nature of xenobiotic compounds makes them resistant to biological degradation. However, numerous microorganisms have been extensively explored for their competency in the degradation of such compounds. Poly...

The development of a clean energy alternative is a crucial aspect of current scientific research concerning the ever-growing surge in demand for energy. The use of traditional sources (fossil sources) for energy generation has raised critical climate issues that are threatening human life on the planet earth. In order to sustain energy demand, hydr...

Low-cost paper-based analytical devices are the latest generation of portable lab-on-chip designs that offers an innovative platform for the on/off-site analysis (biosensing) of target analytes, especially in rural and remote areas. Recently, microfluidic paper-based analytical devices (μPADs) have attained significant recognition owing to their ex...

With a growing interest in precise and sensitive diagnosis for criminal investigations, nanoparticles (NPs) have intrigued scientific minds working in the field of forensic science due to their exceptional properties. Magnetic nanoparticles (MNPs) have emerged as a powerful tool for improving forensic analysis due to their super magnetic behavior c...

In the last few decades, microbes have evolved, having resistance to several drugs and antibiotics. Multiple-drug-resistant (MDR) strains have become a severe threat to human health that needs to be addressed immediately. In this context, research has led to a quest for new strategies in the development of novel antimicrobial therapies. The use of...

In recent decades, ultrasound (US) irradiation technique has established itself for its potential application in several processes in the field of food processing and biotechnology. Although ultrasound treatment was earlier explored mainly for inactivation of microbes by conferring an adverse effect on cellular structure, a recent development in th...

To decrease the dependence on crude oil, biomass derived liquid transportation fuels are highly desirable. Butyl levulinate is a potential cellulose-derived biofuel additive with properties similar to diesel and low water solubility. Herein we report a direct one-pot production of levulinic acid ester, butyl levulinate, from furfuryl alcohol by alc...

There is an ever increasing need to innovate and provide alternative energy sources to reduce the over-dependence on conventional fossil fuels. 2, 5-Dimethylfuran (DMF), a bio-based chemical, has gained a lot ofattention due to its potential application as a biofuel additive and is synthesized through hydrogenation of 5-hydroxymethylfurfural (HMF)....

γ-Valerolactone (GVL) is an important bio-derived molecule that could be used for the sustainable production of value-added chemicals and fuels. It is mainly synthesized by hydrogenation of levulinic acid by using supported ruthenium catalyst. Here we are reporting the synthesis of ruthenium supported on manganese oxide octahedral molecular sieve (...

n-Pentyl tetrahydrfurfuryl ether has desired properties to be used as a diesel component. In this work, one pot synthesis of n-pentyl tetrahydrofurfuryl ether from the condensation of n-pentanol and furfuryl alcohol followed by hydrogenation was studied using a novel metal-acid bifunctional catalyst containing palladium and dodeca-tungstophosphoric...

Selective hydrogenation of benzophenone to benzhydrol is industrially relevant. In the current work, selective hydrogenation of 3,4-dimethoxybenzophenone (3,4-DMBP) to 3,4-dimethoxybenzhydrol (3,4-DMBH) was investigated over 5 % w/w Pd/C and 5 % w/w Pt/C as catalysts in a slurry reactor. The effects of hydrogen partial pressure (0.2-1 MPa), catalys...