Carbon dioxide (CO2) capture using solid sorbents has been recognized as a very promising technology that has attracted intense attention from both academic and industrial fields in the last decade. It is astonishing that around 2000 papers have been published from 2011 to 2014 alone, which is less than three years after our first review paper in this journal on solid CO2 sorbents was published. In this short period, much progress has been made and the major research focus has more or less changed. Therefore, we feel that it is necessary to give a timely update on solid CO2 capture materials, although we still have to keep some important literature results published in the past years so as to keep the good continuity. We believe this work will benefit researchers working in both academic and industrial areas. In this paper, we still organize the CO2 sorbents according to their working temperatures by classifying them as such: (1) low-temperature ( 400 °C). Since the sorption capacity, kinetics, recycling stability and cost are important parameters when evaluating a sorbent, these features will be carefully considered and discussed. In addition, due to the huge amounts of cost-effective CO2 sorbents demanded and the importance of waste resources, solid CO2 sorbents prepared from waste resources and their performance are reviewed. Finally, the techno-economic assessments of various CO2 sorbents and technologies in real applications are briefly discussed.

Recent advances in solid sorbents for CO2 capture and new development trends

Formic acid (FA, HCO2H) receives considerable attention as a hydrogen storage material. In this respect, hydrogenation of CO2 to FA and dehydrogenation of FA are crucial reaction steps. In the past decade, for both reactions, several molecularly defined and nanostructured catalysts have been developed and intensively studied. From 2010 onwards, this review covers recent advancements in this area using homogeneous catalysts. In addition to the development of catalysts for H2 generation, reversible H2 storage including continuous H2 production from formic acid is highlighted. Special focus is put on recent progress in non-noble metal catalysts.

Formic acid as a hydrogen storage material – development of homogeneous catalysts for selective hydrogen release

Biogas as a renewable energy fuel – A review of biogas upgrading, utilisation and storage

A review of the hydrate based gas separation (HBGS) process for carbon dioxide pre-combustion capture

During the past decade, significant advances in ionic liquid-based materials for the development of CO2 separation membranes have been accomplished. This review presents a perspective on different strategies that use ionic liquid-based materials as a unique tuneable platform to design task-specific advanced materials for CO2 separation membranes. Based on compilation and analysis of the data hitherto reported, we provide a judicious assessment of the CO2 separation efficiency of different membranes, and highlight breakthroughs and key challenges in this field. In particular, configurations such as supported ionic liquid membranes, polymer/ionic liquid composite membranes, gelled ionic liquid membranes and poly(ionic liquid)-based membranes are detailed, discussed and evaluated in terms of their efficiency, which is attributed to their chemical and structural features. Finally, an integrated perspective on technology, economy and sustainability is provided.

Ionic liquid-based materials: a platform to design engineered CO2 separation membranes

http://www.faratarjome.ir/u/media/shopping_files/store-EN-1428562662-888.pdf

Progress and trends in CO2 capture/separation technologies: A review

This work presents experimental results on the solubility of CO2 in a new blend of diethanolamine (DEA) and trisodium phosphate (TSP) at temperatures ranging from (303.14 to 333.14) K and partial p...

Solubility of CO2 in an Aqueous Blend of Diethanolamine and Trisodium Phosphate

Solubility of CO2 in aqueous TSP

Recycling of waste plastics is a promising solution to deal with the pressure on fuel economy in forthcoming years and to address the concern regarding its accumulation in the environment. Municipal Solid Waste (MSW) is a dominant source of plastic waste. Waste management principles can be applied for resource recovery and energy generation. Pyrolysis, a thermochemical recycling method, holds multiple advantages in relation to product utility, energy input and environmental footprint. The focus of this review is to investigate the potential of pyrolysis to convert waste plastic stream comprising of a mixture of High-Density Polyethylene (HDPE), Low Density Polyethylene (LDPE), Polypropylene (PP) and Polystyrene (PS) into fuel and value-added products (VAP). Concentrated efforts are made to analyse process conditions to maximize production of utilizable fractions (gas and oil) and value-added chemicals through pyrolysis. Behaviour of plastic waste components under different process conditions with reaction mechanisms in both catalytic and non-catalytic pathways are explored and summarized. Discussions on the importance of kinetic, particle and reactor scale to develop a process scheme for pyrolysis process, futuristic research directions are also presented. This paper also critically reviews utility requirements and well-established commercial process to comply with environmental legislations. 

Valorization of Plastic wastes for Production of Fuels and Value-added Chemicals through Pyrolysis – A review

The purpose of this work was to establish the pyrolysis kinetics of agricultural biomass residues (mustard husk (MH), cotton stalk (CS), and groundnut shell (GNS)) using thermogravimetric analysis (TGA). TGA is carried out at different heating rates (5, 10, 30, and 50 K/min) under inert conditions in the temperature range of 303–1173 K. The iso-conversional methods of Friedman, Kissinger-Akahira-Sunose, and Flynn-Wall-Ozawa were used to estimate the activation energy of the decomposition process. The Criado method, Coats-Redfern Method, and Direct Differential methods were used to model the kinetics, with the latter two methods providing a closer fit with the experimental data. The kinetics of thermal degradation were separately studied for three temperature zones represented as drying, active, and passive zones. The results of Coats-Redfern and Direct Differential methods showed that (i) the nth-order reaction model is applicable for all the samples with order of reaction in the active zone being around ~ 2.0–3.0, ~ 2.5–3.0, and ~ 3.0 for MH, CS, and GNS, respectively, and (ii) the D-3 model is applicable for all the samples in the passive zone.

Hemant Kumar Balsora

Papers

Progress and trends in CO2 capture/separation technologies: A review

Solubility of CO2 in an Aqueous Blend of Diethanolamine and Trisodium Phosphate

Solubility of CO2 in aqueous TSP

Valorization of Plastic wastes for Production of Fuels and Value-added Chemicals through Pyrolysis – A review

Kinetic modelling for thermal decomposition of agricultural residues at different heating rates