Conceptual design and techno-economic analysis for a coal-to-SNG/methanol polygeneration process in series and parallel reactors with integration of waste heat recovery

Li, Mingxin; Zhuang, Yu; Zhang, Lei; Liu, Linlin; Du, Jian; Shen, Shengqiang

doi:10.1016/j.enconman.2020.112890

Cited by 37 publications

(4 citation statements)

References 30 publications

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“…The formation of steam in heat recovery processes is common − and is achieved via the vaporization of water at 100 °C for standard pressures. Heating of steam exceeding its boiling point for a given pressure results in the formation of “dry steam”, or as it is otherwise known, superheated steam .…”

Section: Introductionmentioning

confidence: 99%

Toward High Selectivity Aniline Synthesis Catalysis at Elevated Temperatures

Morisse

McCullagh

Campbell

et al. 2021

Ind. Eng. Chem. Res.

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In connection with an initiative to enhance heat recovery from the large-scale operation of a heterogeneously catalyzed nitrobenzene hydrogenation process to produce aniline, it is necessary to operate the process at elevated temperatures (>100 °C), a condition that can compromise aniline selectivity. Alumina-supported palladium catalysts are selected as candidate materials that can provide sustained aniline yields at elevated temperatures. Two Pd/Al 2 O 3 catalysts are examined that possess comparable mean Pd particle sizes (∼5 nm) for different Pd loading: 5 wt % Pd/Al 2 O 3 and 0.3 wt % Pd/Al 2 O 3 . The higher Pd loading sample represents a reference catalyst for which the Pd crystallite morphology has previously been established. The lower Pd loading technical catalyst more closely corresponds to industrial specifications. The morphology of the Pd crystallites of the 0.3 wt % Pd/Al 2 O 3 sample is explored by means of temperature-programmed infrared spectroscopy of chemisorbed CO. Reaction testing over the range of 60–180 °C shows effectively complete nitrobenzene conversion for both catalysts but with distinction in their selectivity profiles. The low loading catalyst is favored as it maximizes aniline selectivity and avoids the formation of overhydrogenated products. A plot of aniline yield as a function of WHSV for the 0.3 wt % Pd/Al 2 O 3 catalyst at 100 °C yields a “volcano” like curve, indicating aniline selectivity to be sensitive to residence time. These observations are brought together to provide an indication of an aniline synthesis catalyst specification suited to a unit operation equipped for enhanced heat transfer.

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Section: Introductionmentioning

confidence: 99%

Toward High Selectivity Aniline Synthesis Catalysis at Elevated Temperatures

Morisse

McCullagh

Campbell

et al. 2021

Ind. Eng. Chem. Res.

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“…Synthesis at low pressure is intended to inhibit the formation of by-products resulting in high selectivity above 99%. The by-products of methanol synthesis are formaldehyde, formic acid and ether compounds (such as DME), ketone compounds and other compounds resulting from CO hydrogenation [7]. To increase the overall yield of methanol products, it is done by returning the unreacted reactants as reactor feed (recycle).…”

Section: Metahnol Synthesis Technologymentioning

confidence: 99%

Preliminary study of the methanol production process from coal to support the coal downstream program

Daranin,

Umar,

Gunawan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Coal downstreaming is a government program to create a comparative and competitive advantage of coal and its various derivative products. Coal derivative products are expected to be economically competitive with oil and natural gas. One of the coal downstream programs is the production of methanol from coal through the gasification process. The development of the methanol industry will support the government’s program of the transfer from fuel-based oil to biodiesel and will reduce dependence on imports. All types of coal in this study can be used as raw material for the methanol production. The coal with high mositure content ((>40%), prior to the gasification process, a dewatering process is required. The dewatering process chosen is the steam tube drying process, the gasification process with a fixed bed gasifier type, the Davy or Johnson Matthey low pressure methanol synthesis technology and the copper – zinc oxide with aluminum oxide or chromium oxide (Cu – ZnO – Al2O3/Cu – ZnO – Cr2O3) catalyst type.

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“…2,3 Synthetic natural gas (SNG) and methanol (MeOH) are claimed as important downstream products of the coal chemical industry, whose polygeneration process has been studied by some researchers. 4,5 As the literature points out, it is of vital significance for coal-to-SNG/ MeOH to conduct high-efficiency heat recovery due to the existence of a large amount of waste heat in this system. 6,7 Heat integration is an effective manner to improve energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth developing clean and efficient utilization techniques for coal . The coal-based polygeneration process has been proved as an effective technique to realize high-value products and clean utilization structures. , Synthetic natural gas (SNG) and methanol (MeOH) are claimed as important downstream products of the coal chemical industry, whose polygeneration process has been studied by some researchers. , As the literature points out, it is of vital significance for coal-to-SNG/MeOH to conduct high-efficiency heat recovery due to the existence of a large amount of waste heat in this system. , …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Optimization of a Heat-Integrated Coal-to-SNG/MeOH Polygeneration Process Based on Rigorous Kinetic Models

Zhuang

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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In this article, a novel simulation–optimization method is proposed for the simultaneous design of a heat-integrated coal-to-SNG/MeOH (CTSM) polygeneration process, aiming at exergy efficiency enhancement. The genetic algorithm is adopted to simultaneously optimize the presented polygeneration process, which combines the key reaction units based on rigorous kinetic modeling and simulation with a waste heat recovery steam cycle (WHRSC). A heat integration approach that considers variable stream conditions is introduced to connect CTSM and WHRSC. In developing this approach, an extended Duran–Grossmann (D–G) model is established, which incorporates the isothermal phase change and nonisothermal phase change. The interaction mechanism between process synthesis and heat integration is further explored. Compared with the base case obtained by a sequential method, the presented method yields a 2.22 percentage point increase in the overall exergy efficiency and a 44.05% improvement of power generation. In this sense, the utility consumption in the polygeneration process can be sharply reduced and even achieve zero hot utility consumption. The corresponding heat exchanger network is determined that consists of 56 heat exchangers and 7 coolers with a total area of 93 763 m2. Furthermore, the interaction among different process units reveals that process synthesis has a stronger effect on heat integration.

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Conceptual design and techno-economic analysis for a coal-to-SNG/methanol polygeneration process in series and parallel reactors with integration of waste heat recovery

Cited by 37 publications

References 30 publications

Toward High Selectivity Aniline Synthesis Catalysis at Elevated Temperatures

Toward High Selectivity Aniline Synthesis Catalysis at Elevated Temperatures

Preliminary study of the methanol production process from coal to support the coal downstream program

Simultaneous Optimization of a Heat-Integrated Coal-to-SNG/MeOH Polygeneration Process Based on Rigorous Kinetic Models

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