Deepak Pant

Deepak Pant
Flemish Institute for Technological Research | VITO · Sustainable Chemistry

Ph.D.
CO2 electroreduction and electrosynthesis

About

287
Publications
196,491
Reads
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13,423
Citations
Introduction
My research interests are Sustainable Chemistry, CO2 Conversion (CCU), Bioelectrochemical systems, Electrosynthesis, Bioenergy, Biomass, Bioeconomy, Biowaste valorization, Life cycle analysis and Resource recovery.
Additional affiliations
June 2013 - present
Flemish Institute for Technological Research
Position
  • Senior Researcher
Description
  • My work involves research on microbial electrosynthesis and developing electroconversion processes for conversion of CO2 into chemicals.
March 2010 - May 2013
Flemish Institute for Technological Research
Position
  • Researcher
January 2008 - February 2010
Flemish Institute for Technological Research
Position
  • PostDoc Position
Education
August 2002 - December 2006
TERI University
Field of study
  • Environmental Biotechnology

Publications

Publications (287)
Article
The electrochemical CO2 reduction to oxalic acid in aprotic solvents could be a potential pathway to produce carbon-neutral oxalic acid. One of the challenges in the aprotic CO2 reduction are limited achievable current densities under standard conditions, despite the increased CO2 solubility compared to aqueous applications. The application of apro...
Article
Full-text available
Gaseous CO2 solutions are widely used for CO2 electrochemical conversion to various valuable products. However, capture, liberation and storage of gaseous CO2 prior to reduction is cumbersome and costly. CO2 electrocatalytic reduction from captured CO2 (in the form of concentrated bicarbonate solution) offers an option to optimize CO2 reduction pro...
Article
The oxygen reduction reaction (ORR) is an electrochemical process of the utmost importance in energy conversion and storage, corrosion and chemical technologies. The ORR plays a major role in biological processes (such as respiratory biochemical chain reactions) and is being incorporated into numerous bioelectrochemical devices and systems, such as...
Article
A comprehensive mathematical modeling of wastewater-fed microbial fuel cells (MFC) demands an in-depth process understanding of the main electrical and bioelectrochemical interactions at both electrodes. In this study, a novel holistic simulation approach using a low-parameterized model was applied to predict pollutant transport, conversion, and el...
Article
Onion skin waste (OSW) is common waste in developing countries, which can cause severe environmental pollution when not properly treated. Value-added products can be chemically extracted from OSW; however, that process is not economically feasible. Alternatively, dry anaerobic digestion (DAD) of OSW is a promising approach for both energy recovery...
Article
Full-text available
Constructed wetland (CW) systems have proven to be one of the panaceas to the water crisis that can contribute to environmental protection and human health security. Considering the popularity of CW in wastewater treatment, its broader application , especially for remediation of contaminants of emerging concerns in the real-world scenario, is limit...
Article
Full-text available
Oxygen reduction reactions (ORRs) are unanimously a key factor of system performances in bioelectrochemical systems (BESs), low-temperature fuel cells, and generally in several electrochemical platforms. Platinum (Pt)-based catalyst is the finest electrocatalyst for ORR in BESs; however, it is constrained by its low abundance, high price, and poor...
Article
Biomethanization of crude rice straw (RS) was enhanced by a coupled effectiveness of sulphonated graphene (SGR) with sludge rich anaerobes (SRA). A reduction of 19.2±1.32% for cellulose, 40.8±3.7% for hemicellulose and 30.8±2.4% for lignin was achieved with addition of SRA after fermentation of 60 days. The abundance of hydrolytic microbes in SRA i...
Article
Microbial extracellular electron transfer-based processes are rapidly progressing toward real-world wastewater treatment applications, but their technological progress as an electric power source remains elusive. It is mainly due to low and unstable power density and high internal resistance of the bioelectrochemical systems. In a recent Energy & E...
Article
CO2 electrolyzers require gaseous CO2 or saturated CO2 solutions to achieve high energy efficiency (EE) in flow reactors. However, CO2 capture and delivery to electrolyzers are in most cases responsible for the inefficiency of the technology. Recently, bicarbonate zero-gap flow electrolyzers have proven to convert CO2 directly from bicarbonate solu...
Article
In order to achieve a carbon-efficient circular economy, a paradigm shift is required to valorize carbon dioxide (CO2) and organic wastes to value-added products. Among others, microbial electrosynthesis (MES) and electrofermentation (EF) technologies have shown the potential to contribute to the circular carbon economy. Besides carbon conversion,...
Article
The performance of biophotovoltaics (BPVs) having clay separators modified with 10%, 15%, and 20% of Fuller's earth-material (FEM) to improve the cation exchange capacity was assessed on the basis of wastewater treatment and electrochemical analyses. Among the three variants of clay separators other than the commercial proton exchange membrane (PEM...
Article
Full-text available
In this study, four different polymeric binders - polytetrafluoroethylene (PTFE), two-component epoxy (epoxy), polyvinyl alcohol (PVA), and polyvinylidene fluoride (PVDF) - were used to fabricate a surface-modified stainless-steel electrode. The polymeric binders were used to bond highly conductive carbon-black to a stainless-steel support using a...
Article
Urine is a ‘valuable waste’ that can be exploited to generate bioelectricity and recover key nutrients for producing NPK-rich biofertilizers. In recent times, improved and innovative waste management technologies have emerged to manage the rapidly increasing environmental pollution and to accomplish the goal of sustainable development. Microbial fu...
Article
This work reviews technologies that can be used to develop low-temperature solid oxide cells (LT-SOCs) and can be applied in fuel cells and electrolyzers operating at temperatures below 500°C, thus providing a more cost-effective alternative than conventional high-temperature SOCs. Two routes showing potential to reduce the operating temperature of...
Article
Implicit interaction of electroactive microbes with solid electrodes is an interesting phenomenon in nature, which supported development of bioelectrochemical systems (BESs), especially the microbial fuel cell (MFCs) for valorization of low-value waste streams into bioelectricity. Intriguingly, the metabolism of interacted microbes with electrode i...
Article
To valorize waste CO2, capturing and utilizing it to produce chemical building blocks is currently receiving a lot of attention. In this respect, amine and alkali base solutions have shown to be efficient CO2 capturing solutions and electrochemical CO2 conversion is a promising technology to convert CO2 and as such reduce greenhouse gas emissions....
Chapter
Full-text available
The water sector is in the middle of a paradigm shift from focusing on treatment and meeting discharge permit limits to integrated operation that also enables a circular water economy via water reuse, resource recovery, and system level planning and operation. While the sector has gone through different stages of such revolution, from improving ene...
Article
Microbial fuel cell (MFC) with live diatoms (Nitzschia palea) displacing bacteria in the anodic chamber generated electrical potential. Unlike other microalgae, diatoms fix 25% of atmospheric CO2, thus releasing O2. They perform photolysis of water by photosynthesis in the plastid during light photoperiod and cellular respiration in the mitochondri...
Article
Full-text available
Microbial electrochemical approach is an emerging technology for biogas upgrading through carbon dioxide (CO2) reduction and biomethane (or value-added products) production. There are limited literature critically reviewing the latest scientific development on the Bioelectrochemical (BES) based biogas upgrading technology, including CO2 reduction e...
Article
Experimental data that allow for a precise identification of the total ammonia nitrogen (TAN) elimination pathways in single-chamber microbial fuel cells (SC-MFCs) are still very rare. However, nitrification-denitrification and ammonia volatilization are commonly reported as the two main removal mechanisms. This work presents a mathematical model t...
Article
Full-text available
Lignocellulosic biomass generated from different sectors (agriculture, forestry, industrial) act as biorefinery precursor for production of second-generation (2G) bioethanol and other biochemicals. The integration of various conversion techniques on a single platform under biorefinery approach for production of biofuel and industrially important ch...
Article
Full-text available
This study aimed at recovering nutrients from human urine as valorized products through chemical and biological mineralization, and assessing their fertilizer potential. Chemosynthesis of struvite (MgNH4PO4 ⋅6H2O) was accomplished from fresh human urine through chemical mineralization using magnesia, whereas biogenic synthesis was achieved through...
Article
The ability of microalgae to grow in a broad spectrum of wastewaters manifests great potentials for removing contaminants from effluents of industries and urban areas. Since the post-treatment microalgae biomass is also a significant source of high-value products, microalgae-based wastewater treatment is an economical and sustainable solution to wa...
Article
Application of power management system (PMS) in microbial fuel cell (MFC) for potential energy harvesting is coming up as an emerging trend for field level applications. Though the energy recovery and environment benefits of MFC are well recognized, still scaling-up challenges are confronted during onsite applications for sufficient power generatio...
Chapter
There is an urgent need to reduce the burgeoning carbon dioxide in the atmosphere, usually caused by burning fossil fuels, and convert it into products that could be used in generating renewable energy. The global use of fossil-based non-renewable fuels is being diminished as more green and sustainable methods are being employed for energy producti...
Chapter
Greenhouse gases are the major cause of global warming. Carbon dioxide, a major greenhouse gas, is released into the atmosphere because of fossil fuel burning and deforestation. Researchers are trying to control escalating level of CO2 by a global approach of carbon capture, storage, and utilization (CCSU) methodology. Bioelectrochemical system (BE...
Chapter
From the standpoint of a circular bioeconomy, recycling carbon dioxide into organic products and efficient wastewater treatment through microbial electrosynthesis (MES) is appealing. However, before MES applications can be scaled up, a variety of associated issues must be resolved. The recent developments in electrode materials, microbe-catalyzed C...
Article
With escalating global demand for renewable energy, exploitation of farm wastes (i.e., agriculture straw wastes (ASWs), livestock wastewater (LW) and sewage sludge (SS)) has been considered to attain maximum methane yield (MY) via anaerobic digestion (AD). Results pointed that mixture of SS and LW as anaerobes’ source with 20 g of ASWs/300 mL of wo...
Article
Typical reactions in bioelectrochemical systems (BESs) promote the phenomenon of the pH split between anode and cathode. The pH split results in an undesirable phenomenon which has stimulated several technological solutions to limit its effects, particularly for energy-producing bioelectrochemical systems (BESs). On the other hand, several applicat...
Article
Biomass as a resource is present in large quantities and offers environmental benefits from sequestration of carbon to bioenergy production. Production of renewable and sustainable biofuel (bioethanol) from biomass is gaining overwhelming interest globally. Biofuels are important and beneficial from environmental and economic points of view. The ga...
Article
Full-text available
Microbial electrochemical processes are primary platforms for generating electricity or value-added products by relying on the interaction between electroactive microorganisms and electrodes by utilizing electron carriers like hydrogen and enzyme through the oxidation–reduction reactions. Microbial electrosynthesis (MES), initially introduced as el...
Article
Full-text available
Carbon dioxide conversion into useful products has been gaining considerable attention as a global-warming-mitigation technique. The electrochemical conversion of CO 2 into high-value chemicals involves the utilization of electrical energy in the presence of an effective catalyst. The process products depend on the number of transferred electrons d...
Cover Page
Full-text available
Nanosized metal-derivatives are widely utilized in the augmentation of biogas production. A review on how they can be synthesized, utilized, and disposed in a more sustainable way is presented.
Article
In this study, a novel efficient cathode electrode was fabricated to convert inorganic carbon to volatile fatty acids (VFAs) through microbial electrosynthesis (MES) in a single chamber reactor. The cathode catalyst was made up of mesoporous silica (mS) coated cerium oxide (CeO2) and carbonized cellulose (C) in which mS acts as core material and bo...
Article
General Discussion on Emerging technologies at the Faraday Discussion on Carbon dioxide utilisation
Article
General Discussion on Thermal catalytic conversion at the Faraday Discussion on Carbon dioxide utilisation
Article
Discussion of the accelerated mineralisation session at the Faraday Discussion on Carbon dioxide utilisation (2021)
Article
General discussion on Life cycle and upscaling at the Faraday Discussion on Carbon dioxide utilisation (2021)
Preprint
Full-text available
The current enthusiasm for circular economy (CE) offers a unique opportunity to advance the impact of research on sustainability transitions. Diverse interpretations of CE by scholars, however, produce partly opposing assessments of its potential benefits, which can hinder progress. Here, we synthesize policy-relevant lessons and research direction...
Patent
The present invention discloses a membrane-less reactor design for microbial electrosynthesis of alcohols from carbon dioxide (CO2). The membrane-less reactor design thus facilitates higher and efficient CO2 transformation to alcohols via single pot microbial electrosynthesis. The reactor design operates efficiently avoiding oxygen contact at worki...
Article
Biochar a pyrogenic black carbon is derived by pyrolysis of carbon-rich biomass in an oxygen-limited environment. The physicochemical characteristics of biochar strongly impact the multifunctional role of biochar e.g., carbon sequestration and enhancement of soil fertility, biosorption or environmental remediation, fuel cells, supercapacitors, and...
Article
The enzyme cellulase is a consortium of three enzymes-exo-glucanase, endo-glucanse and β-glucosidase, which can be produced by various microorganisms naturally and is ecologically important as it recycle cellulose in biosphere. Cellulase is a potential candidate in numerous industries as textile, detergent, pulp and paper, bioactive compounds, food...
Article
Microbial electrochemical synthesis (MES) can promote an electro-reduction of CO 2 to value-added products with nanohybrid catalysts for efficient electron and mass transfer. This study aimed to develop a novel electrode made of nanowires interconnected with flower-like morphology of MnO 2 decorated over reduced graphene oxide (rGO) for the convers...
Patent
The present invention is related to the electro-chemical conversion of CO 2 and provides the use of Gas Diffusion Electrode with an aprotic solvent in such conversion of CO 2 as well as an electrochemical cell for use in such conversion. The application and electrochemical cell as herein provided are particularly useful in the conversion of CO 2 in...
Article
The efficient energy recovery from wastewater through microbial fuel cells (MFC) depends on a comprehensive understanding of the electrochemical properties of the system. Different methods to infer electrochemical parameters can be applied. However, the absence of studies confirming the compatibility and inter-validity of these methods makes their...
Article
The anaerobic technology plays a fundamental role in both energy recovery and pollutant removal from wastes. However, it usually suffers from several bottlenecks, such as low reaction rates and poor system stability. To compensate for these limitations, the use of electrical stimulation to promote the anaerobic process, named as electricity-stimula...
Article
Fluoride is recognized as one of the global environmental threats because of its non-biodegradable nature and long-term persistence in the environment. This has created the dire need to explore various defluoridation techniques (membrane process, adsorption, precipitation, reverse osmosis, ion exchange, and electrocoagulation). Owing to their cost...
Book
Full-text available
Emerging Technologies and Biological Systems for Biogas Upgrading systematically summarizes the fundamental principles and the state-of-the-art of biogas cleaning and upgrading technologies, with special emphasis on biological processes for carbon dioxide (CO2), hydrogen sulfide (H2S), siloxane, and hydrocarbon removal. After analyzing the global s...
Chapter
Power-to-gas (PtG) is a technology in development in the field of renewable energy (RE) and sustainable energy management. RE such as solar and wind are unreliable sources of energy due to their dependence on nature, which is highly unpredictable. This makes electricity production via the aforementioned sources largely intermittent and fluctuating....
Chapter
Biogas upgrading by employment of bioelectrochemical systems (BESs) is an emerging approach for electricity-based production of biomethane. Recent advances within the field have successfully demonstrated BES for biogas upgrading at laboratory scale under different configurations and operating conditions: in situ, ex situ, batch mode, and continuous...
Article
Performance of clayware Biophotovoltaics (BPVs) with three variants of inocula namely anoxygenic photosynthetic bacteria (APB) rich Effective microbes (EM), Up-flow anaerobic sludge blanket reactor (UASB) sludge, SUPER-MIX the blend of EM and UASB inoculum were evaluated on the basis of electrical output and pollutant removal. SUPER-MIX inocula wit...
Article
The inhibition of the anaerobic digestion (AD) process, caused by long chain fatty acids (LCFAs), has been considered as an important issue in the wastewater treatment sector. Proper understanding of mechanisms behind the inhibition is a must for further improvements of the AD process in the presence of LCFAs. Through analyzing recent literature, t...
Article
Carbon dioxide (one of the main greenhouse gases) can be used as a raw material in microbial electrosynthesis system (MES) for the production of valuable organic compounds. However, one of the major drawbacks associated with the MES is the mass transfer limitation of CO2 in the aqueous phase. In order to overcome this limitation, several operationa...
Article
Full-text available
A variety of pathogenic microorganisms can survive in the drinking water distribution systems (DWDS) by forming stable biofilms and, thus, continually disseminating their population through the system's dynamic water bodies. The ingestion of the pathogen-contaminated water could trigger a broad spectrum of illnesses and well-being-related obstacles...
Article
Platinum has been used extensively in low-temperature fuel cells (LTFCs), including polymer electrolyte fuel cells and microbial fuel cells (MFCs). Still, its replacement with low-cost alternatives has been a matter of considerable conjecture for some time. This study investigates the possible use of an electrochemically synthesized CP/PANi-Cu cath...
Article
Considering the complexity associated with bioelectrochemical processes, the performance of a microbial fuel cell (MFC) is governed by input operating parameters. For scaled-up applications, a MFC system needs to be modeled from engineering perspectives in terms of optimum operating conditions to get higher performance and energy recovery. Several...
Article
In order to realize simultaneous removal of pyridine and denitrification, an integrated bioelectro-photocatalytic system (IBPS) equipped with N-doped graphene/α-Fe2O3 modified graphite felt (GF) photoanode and GF biocathode was constructed and operated in ON-OFF illumination mode. Compared to α-Fe2O3 modified GF electrode, N-doped graphene/α-Fe2O3...
Article
This special issue on ‘Microbial Fuel Cell/Bioelectrochemical Systems (VSI:MFC/BES-2020)’ aims to bring together the current perspectives, recent trends, future scope and challenges in this domain. The necessity and benefits of MFC diversification is explicitly discussed through a bountiful collection of research and review articles from all parts...
Article
A facile and single-step nickel oxide (NiO)-grown 3-D graphitic carbon nanofibers (CNFs)-engrained carbon foam (CF)-based electrode was fabricated using chemical vapour deposition (CVD) technique. The prepared NiO-CNF-CF was directly used as electrodes (anode and cathode) in a double-chambered microbial fuel cell (MFC). NiO played dual roles: (i) a...
Article
Sanitation is the basic quality index of life and proper sanitation practices play a vital role in maintaining the hygienic conditions. Use of human waste (urine and faeces) as a substrate for microbial oxidation is found to be sustainable approach towards improving the sanitation facilities. Advancement in microbial fuel cell (MFC) system towards...
Book
Full-text available
1. Information on new developments in the applications of biotechnical and microbiological methodology for best utilization of waste will help the researchers/industrialists for up to date guidance. 2. The sustainability assessment will provide information to policy makers about effects of new developments on the society, environment and economy. 3...
Article
Full-text available
Bio-based circular economy forms an integral part of circular economy and it plays a vital role in achieving sustainability on both the resources and environmental front. Drivers for circular bioeconomy are awareness, public & industrial acceptance, systems thinking, policy framework, sustainable production & consumption, and zero discharge. Bioeco...
Article
In this study, a cost and time saving strategy for the recovery of biomethane from rice straw using a novel phase-separation delignification process prior to a bacterial pretreatment (BP) has been reported. The rice straw was subjected to delignification using mechanical homogenization to remove the lignin content, which enhanced the mass transfer...
Article
Anode performance in microbial fuel cell (MFC) is usually examined by monitoring anode potentials in whole-cell polarization tests. However, this method does not fully test anode capabilities at higher current densities. To determine maximum anode current densities over a range of carbonate buffer (CB) concentrations we examined electrode performan...
Article
Sustainable production of solar-based chemicals is possible by mimicking the natural photosynthetic mechanism. To realize the full potential of solar-to-chemical production, the artificial means of photosynthesis and the biological approach should complement each other. The recently developed hybrid microbe–metal interface combines an inorganic, se...