https://ce.ccerci.ac.ir/ Chemistry Communication and Chemical Engineering en daily 1 Mon, 11 Aug 2025 00:00:00 +0330 Mon, 11 Aug 2025 00:00:00 +0330 https://ce.ccerci.ac.ir/article_226862.html Nanomaterials are being employed to enhance the performance and durability of equipment such as pipes and drilling bits. They are used as smart additives in drilling fluids, cementing, and fracturing operations. Owing to their exceptional mechanical, electrical, and thermal properties, a wide range of nanomaterials has been applied across multiple domains. Research on these materials has progressed beyond laboratory and simulation studies, with several successful field implementations reported worldwide. However, as the use of engineered nanoparticles expands rapidly, it is essential to assess their potential risks to human health, ecosystems, and the environment. While nanotechnology holds significant promise for the upstream oil industry, establishing clear standards and sustainable infrastructure is necessary to minimize potential harm and ensure economic feasibility. In this review, we explain the current applications of nanotechnology in upstream operations, assess its effectiveness through laboratory and field data, and highlight the major challenges and future prospects for its industrial deployment. https://ce.ccerci.ac.ir/article_226863.html The satisfactory results of using methanol as a fuel in heavy machinery onshore, together with its numerous advantages in comparison with other conventional fuels in the maritime industry, such as HFO (Heavy Fuel Oil) and MDO (Marine Diesel Oil), have highlighted methanol as one of the possible alternative fuel options in this industry. Compared to other conventional fuels for ships, methanol has much cleaner combustion in a way that its emission rate of sulfur compounds is zero. Moreover, the nitrogen compounds produced by methanol during combustion are significantly lower and the amount of soot produced in the engine is at least 90% less than conventional fuels. In the present review article, the physical and chemical features of methanol to be used as fuel for ships are primarily explored. In addition, we will briefly go through the design considerations of methanol-fueled ships, and finally, we will review the practices of leading companies in the use of methanol fuel, as well as their implemented innovative measures. https://ce.ccerci.ac.ir/article_226864.html Dithiocarbamates and their derivatives play a crucial role in medicinal chemistry and agriculture, especially when combined with novel systemic fungicides to enhance their effectiveness. To address the environmental concerns associated with traditional toxic organic solvents, the use of environmentally friendly reaction media, such as deep eutectic solvents and ethyl acetate, has emerged as a promising alternative. This report presents a one-pot synthesis of novel dialkylthiocarbamate derivatives using ethyl acetate as a green solvent. The reaction exhibits excellent yields, short reaction times and eliminates the need for harmful solvents and laborious work-up procedures. https://ce.ccerci.ac.ir/article_226865.html Recently, researches have been directed towards a simple and consistent path to green chemistry.In this study, halloysite nanotubes were modified by Fe3O4 nanoparticles, humic acid molecules and copper (HNTs@Fe3O4@HA-Cu) for the first time. Next, the chemical structure, crystalline structure, surface morphology, thermal stability and magnetic properties of the catalyst were checked by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Field Emission-scanning electron microscopy (SEM), vibration sample magnetometer (VSM) and thermogravimetric analysis (TGA). Then, the catalytic performance of the novel and eco-friendly HNTs@Fe3O4@HA-Cu nanocatalyst was investigated in the synthesis of tetrazole derivatives as an important heterocyclic compound. The utilization of this nanocatalyst has many advantages including high efficiency, using non-toxic solvent and doing the reaction in the mild condition. Also, this nanocatalyst has some prominent features like easy separation, green, recoverable and reusable, stability, convenient preparation and highly efficient. https://ce.ccerci.ac.ir/article_226893.html A fast, simple and eco-friendly microextraction method termed ionic liquid-rotative liquid-liquid microextraction (IL-RLLME), coupled with high performance liquid chromatography (HPLC) was developed for preconcentration and determination of polycyclic aromatic hydrocarbons (PAHs) in environmental waters and food samples. The combination of ionic liquid-rotative liquid-liquid microextraction method with HPLC-DAD makes it possible to use of the less volume of the extraction phase and also simultaneous preconcentration and determination of several analytes. Different ionic liquids (ILs) were evaluated for preconcentration procedure and 1-hexyl-3-methylimidazolium bis (trifluoromethylsolfonyl) imid [C6mim][NTf2] was chosen as most suitable extraction solvent. In addition, various parameters affecting the extraction efficiency such as, volume of extraction solvent, extraction time, and speed were optimized. Under the optimized conditions, the calibration curves gave high levels of linearity having correlation coefficients (R) greater than 0.99 and the limits of detection (LODs), ranging from 0.005-0.013 μg L-1. The relative standard deviations (RSDs) were in the range of 1.36-2.40 % (n = 8) for 100 mg L-1 mixed solution of PAHs. The proposed method provided high enrichment factors in the range of 590–1431 for PAHs.