Muhammad Asif Nawaz

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• Doctor of Engineering (Chemical Process Engineering, Heterogeneous Catalysis, & Reaction Kienetics)
• Scientific Investigator at Centro de Investigaciones Científicas Isla de la Cartuja

The efficient conversion of syngas to aromatic hydrocarbons (STA) has attracted attention in recent years for its extensive utilization in the energy and defense sectors. In current study, the alloying of two active FT synthesis metal components (Fe−Co) was employed in Na‐FeMnCo/HZSM‐5 composite catalyst for STA process. Different calcination tempe...

Herein, an activated carbon (AC) modified Fe-oxide catalyst has been employed in Na-FeCa@AC/HZSM-5 integrated catalytic system for the direct conversion of syngas to aromatics (STA). In comparison to the conventionally impregnated Fe/C catalysts, the spatial confinement of highly dispersed Fe 3 O 4 nanocrystals in a rigid geometry of defective grap...

The reliance of a future carbon-free horizon is strongly aligned with the long-term energy storage avenues which are completely derived from renewable energy resources. Ammonia with its high energy content and density can perform as a decent candidate for buffering the short-term storage options. However, the current NH3 production majorly feeding...

The escalating concerns about traditional reliance on fossil fuels and environmental issues associated with their exploitation have spurred efforts to explore eco-friendly alternative processes. Since then, in an era where the imperative for renewable practices is paramount, the aromatic synthesis industry has embarked on a journey to diversify its...

The valorization of carbon dioxide into high-value-added hydrocarbons, especially light olefins (C2-C4=) through sustainable energy input holds significant industrial value, offering a route for producing essential chemical feedstocks while simultaneously mitigating the emission of this potent greenhouse gas. Despite significant advancements in CO2...

Aromatic hydrocarbons play a pivotal role in various industrial applications, serving as essential building blocks to produce polymers, resins, and specialty chemicals. Traditionally, their synthesis has been reliant on fossil fuels, raising concerns about environmental sustainability and resource depletion. However, recent advancements in the fiel...

The Ni/CeO 2 catalyst stands out among various solid metal oxide catalysts for its exceptional catalytic proficiency, positioning it as a prime candidate for the industrialization of methanation processes. This review thoroughly examines the prevalent challenges associated with Ni/CeO 2 in methanation reactions, compiles current strategies to overc...

Escalating SOx and NOx emissions from industrial plants necessitates customized scrubbing solutions to improve removal efficiency and tackle cost limitations in existing wet FGD units. This work investigates the real-time intensified removal pathways via an innovative two-stage countercurrent spray tower configuration strategically integrating NaOH...

Fe-based catalysts show great promise in advancing the application of high-temperature Fischer-Tropsch synthesis (HT-FTS) for producing value-added chemicals and liquid fuels; however, maintaining high catalytic activity and stability at elevated temperatures remains a significant challenge. Here, a novel approach was employed to prepare carbon sph...

Ethylene, as an important chemical raw material, could be produced through the coal-based acetylene hydrogenation route. Nickel-based catalysts demonstrate significant activity in the semihydrogenation reaction of acetylene, but they encounter challenges related to catalyst deactivation and overhydrogenation. Herein, the effect of Sn promoter on Ni...

ACS Sustainable Resour. Manage. 2024, 1, 11, 2338–2349. https://pubs.acs.org/toc/asrmcd/1/11. This cover image from the article "Navigating the Legislative Interventions, Challenges, and Opportunities in Revolutionizing Textile Upcycling/Recycling Processes for a Circular Economy" encapsulates the core elements of sustainable fashion, emphasizing t...

In contemporary catalytic interface exploration, experimental studies often take a backseat to theoretical simulations, hindering the development of pristine catalytic interfaces. This research leverages monolayer dispersion theory to design an efficient CO oxidation catalyst through precise manipulation of non-precious metal NiOsingle bondCeO2 int...

Embracing a circular economy in the textile industry represents a crucial step toward sustainability, where fashion and textile sectors contribute significantly to CO2 emissions. However, transitioning from a linear "take-make-waste" model to circularity, poses multifaceted challenges, that highlight the staggering volume of annual textile waste su...

The production of light olefins from the hydrogenation of CO2 is an efficient way to utilize CO2, where the surface oxygen vacancy in metal oxide plays an important role in CO2 adsorption and activation. Here, the Ga-Zr metal oxides were prepared by hydrolysis of urea at different temperatures and combined with SAPO-34 to prepare the bifunctional c...

One of the critical questions addressed in this Research Topic is how to improve the efficiency and selectivity of catalysts to maximize the yield of desired products while minimizing by-products and waste. This involves optimizing catalyst composition, structure, and reaction conditions. Another significant Research Topic is the utilization of sus...

Given the rapid advancements in artificial intelligence, there is an escalating demand for wearable sensors. An efficient graphene-based material synthesized from the mesophase pitch of waste slurry oil was integrated into a cost-effective piezoresistive pressure sensor consisting of a conductive film made of carbon nanotubes (CNTs), graphene, and...

The urgent need for mitigating climate change necessitates a transformative shift in energy production and consumption paradigms. Amidst this challenge, bioenergy emerges as a pivotal contributor to the global energy transition, offering a diverse array of solid, liquid, and gaseous fuels derived from biomass. This mini review delves into the uniqu...

The oxidative carbonylation of methanol to synthesize dimethyl carbonate (DMC) has been extensively studied over Cu‐based catalysts, but the activity and selectivity are not high. The Co catalysts exhibit high DMC selectivity, but the difficulty in recycling homogeneous Co catalyst and the low conversion of heterogeneous Co catalyst limit the appli...

Naphtha, as the primary raw material in the production of light olefins, could well accommodate their increasing demand through the energy-efficient process of catalytic cracking with ZSM-5. In the current work, different amounts of lanthanum and phosphorous were loaded on ZSM-5 using the wet impregnation method to tune the acidic properties of ZSM...

Fischer-Tropsch Synthesis (FTS) allows the conversion of syngas to high-density liquid fuels, playing a key role in the petrochemical and global energy sectors over the last century. However, the current Global Challenges impose the need to recycle CO2 and foster green fuels, opening new opportunities to adapt traditional processes like FTS to beco...

A bifunctional catalyst, comprising GaZr oxide and SAPO-34 zeolite, manifests enhanced catalytic activity in CO2 hydrogenation to light olefins; nonetheless, the comprehensive analysis of the pivotal role played by the underlying structure of ZrO2 in Ga-Zr oxide has not been investigated. Herein, different crystalline structures of ZrO2 were prepar...

In this piece, we explore the transformative potential of sustainable biofuel production as a solution to the energy crisis and a pivotal element in realizing the environmental and societal ambitions of Society 5.0. Through a critical examination of “bottom-up” and “top-down” strategies for converting bio-feedstocks sourced from anthropogenic activ...

This study introduces a novel techno-economic approach to renewable ammonia production using landfill biogas. The proposed process involves bio-hydrogen generation from landfill biogas, nitrogen production via air separation, and the Haber-Bosch process. Building on our prior research, which demonstrated the economic competitiveness of renewable hy...

With the widespread application of communication equipment with electromagnetic signal transmission to cause electromagnetic radiation pollution, there is an urgent need for high-performance electromagnetic shielding materials. Here, an ultrathin, flexible, alternating multilayered, and conductive gradient-structured cellulose nanofiber–MXene/silve...

Syngas can be efficiently converted to multimethylbenzenes by integrating a methanol synthesis catalyst with HZSM-5 zeolites, where 1,2,4,5-tetramethylbenzene (durene) is a high value-added product used in polyimide synthesis. Here, we synthesized a Mn modified ZnAlO x catalyst with petaloid structure and integrated with HZSM-5 as a bifunctional ca...

The transformative power of CO2 methanation can efficiently transform the greenhouse gases effect into high-value products, aligning with the carbon neutrality goals. However, achieving this target at low temperatures requires...

Direct conversion of syngas to light hydrocarbons has been intensively studied in recent years; however, the high selectivity of light hydrocarbons is still a challenging task to achieve a high CO conversion. Here, a bifunctional catalyst consisting of a methanol synthesis catalyst (CZA) and a methanol to dimethyl ether (DME) catalyst (Al2O3) was e...

Bifunctional catalyst composed of metal oxide and zeolite (OX-ZEO) is a promising strategy for the direct conversion of syngas to light olefins (STO), where the structure of zeolite plays a vital role in determining the selectivity of product. Herein, three kinds of silicoaluminophosphate zeolites with different topological structures, i.e., the ER...

In the synthesis of polyoxymethylene dimethyl ethers (PODEn) from formaldehyde (FA) and methanol (MeOH) solution, the methanol conversion and PODEn selectivity are unsatisfactory because the presence of water limits the adsorption of reactants on acid sites and leads to the hydrolysis of some products. Herein, polystyrene-based hybrid solid acids w...

The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS2)/titania (TiO2)/Ti2CTx and MoS2/Ti2CTx...

In classical homogeneous catalysis with noble metals as catalysts, catalyst separation is a major obstacle of its widespread application. It has by far still a challenge to establish a highly effective and easy-to-separate system in a rational manner. Herein, rationally tailored acidic deep eutectic solvents (ADESs) were applied as acid promoter, p...

The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS 2 )/titania (TiO 2 )/Ti 2 CT x and MoS...

The slurry bed reactor has many advantages, which make it very suitable for gas-to-liquid processes, especially for the highly exothermic reactions. This chapter reviews three types of slurry bed reactors and their comparisons, including the mechanically stirred slurry reactor, bubble column slurry reactor and three-phase fluidized bed reactor. The...

Effectively converting syngas to aromatics attracts widespread attention for its potential value in alleviating the scarcity of oil resources, while the promising catalysts composited with Fe-based oxides and zeolites are typically plagued by lower aromatics selectivity. Herein, ultrafine NaFeMn-Si catalyst is designed via the surface decoration of...

One-step process route of syngas conversion to aromatics (STA) has become an alternative key technology of non-petroleum carbon resources in the growing demand of the modern petrochemical sector. In the current study, the influence of various compositions of Cu and Co species were evaluated in Fe-Co/Fe-Cu bimetallic systems for the catalytic activi...

The synthesis of polyoxymethylene dimethyl ethers as an ideal diesel fuel additive is the current hot topic of modern petrochemical industry for their expedient properties in mitigating air pollutants emission during combustion. In this work, a series of spherical sulfated zirconia catalysts were prepared by a one-pot hydrothermal method assisted w...

Carbonaceous materials (CMs) have been applied extensively for enhancing the catalytic performance of environmental catalysts, however, the self-catalytic mechanism of CMs for groundwater remediation is rarely investigated. Herein, we unveiled the catalytic ability of various CMs via Fe(III) reduction through polyvinyl alcohol-coated calcium peroxi...

Depleting fossil fuel resources and the souring of energy requirement in the past few decades have supered the synthesis of value-added organic building blocks from conventional routes towards potential biomass or coal-based syngas (CO+H2) process. Among these, the efficient conversion of syngas to aromatics (STA) has got much attention in recent y...

Carbonylation of ethanol is a potentially attractive route for propionic acid production, while its industrial practice is greatly hampered by the low space-time yield. To improve the reaction rate of ethanol carbonylation, a series of diphosphine ligands were investigated in the homogeneous rhodium complex catalyst system. The catalyst activity an...

Polyoxymethylene dimethyl ether (PODEn) is a clean, effective and promising diesel additive. In this work, acidic sulfonated resin modified by zirconium (Zr4+-SR), which possess both Lewis and Brønsted acid sites, was employed to catalyze the synthesis of PODEn from methanol (MeOH) and formaldehyde (FA) solution. The catalysts were investigated by...

Carbonylation of ethanol using homogeneous rhodium complex catalysts is an essential route for the manufacture of propionic acid, as carbonylation of methanol to acetic acid is a large‐scale commercial process that could provide critical insights for the ethanol carbonylation process. The reaction mechanism of ethanol has not been well understood y...

of main observation and conclusion The addition of Zr increased the dispersion and antisinitering of Cu species and Nb adjusted the HZSM‐5 acidity. Bifunctional catalyst increased selectivity of aromatics to 39.8%, and 60.0% for durene in aromatics. A method for resolving the temperature mismatch between Cu‐based catalysts and HZSM‐5 zeolite is pro...

The demand for aromatics, especially benzene, toluene, and xylene, has been increased in recent years as the crucial feedstocks of coatings and pharmaceutical industry. In this work, a modified Fischer–Tropsch synthesis (FTS) catalyst FeNaMg was fabricated via a sol-precipitation method and integrated with an HZSM-5 aromatization catalyst for the a...

Composite catalyst of metal oxide and zeolite has been widely adopted in direct conversion of syngas to aromatics (STA). However, stability along with higher conversion and selectivity remains the bigger challenge to overwhelm. Herein, we present an efficient STA catalyst composed of Na modified Fe-Mn oxide and HZSM-5 zeolite, while gradual decline...

Polyoxymethylene dimethyl ethers (PODEn) are extremely effective diesel additives to reduce soot formation during combustion. We introduce a series of Fe‐Zn composite solid acid catalysts (SO4²⁻/xFe2O3‐yZnO), for the condensation reaction of methanol and paraformaldehyde (PF) with a cheap and feasible route to efficiently synthesize PODEn. These ca...

The catalytic system for ethanol carbonylation consists of rhodium with hydroiodic acid, ethyl iodide and lithium iodide as promoters exhibited an attractive catalytic activity at low water content (< 4.6 wt%). The effects of catalyst components and process conditions on the reaction were studied by comparing the products selectivity and the carbon...

Summary: The invention discloses a composite catalyst for directly producing high-value aromatic hydrocarbons from synthesis gas by the iron and manganese oxides. The composite catalyst provided by the invention realizes the series coupling of the multi-stage reaction through the composite of the metal oxide catalyst and the nano HZSM-5 molecular s...

Direct synthesis of aromatics from syngas is a split-new research direction of coal-to-chemicals industry over the years. The effects of Zn and K on FeZr catalysts combined with Ni modified zeolite (Ni/HZSM-5) were investigated for the reaction. Modified catalysts exhibited excellent catalytic activity, showing superior selectivity of aromatic prod...

In recent years, the demand for durene has been increased as the raw material of polyimide. However, traditional synthesis methods of durene require a large number of steps with lower efficiency. In this study, a novel synthesis method of a bifunctional integrated catalyst had been utilized, in which the methanol synthesis catalyst Cu/ZnO/Al2O3 (CZ...