Interactive heat transfer characteristics of 5 kW class shell-and-tube methane steam reformer with intermediate temperature heat source

Yun, Jinwon; Kim, Younghyeon; Yu, Sangseok

doi:10.1016/j.ijhydene.2020.05.152

Cited by 14 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. The reforming tube has the characteristics of both a reactor and a pressure vessel, and is a key component of the SMR reaction [56].…”

Section: Materials Requirements For Safety 41 Reforming Furnacementioning

confidence: 99%

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

Feng,

Gu,

Pang

et al. 2024

ChemBioEng Reviews

View full text Add to dashboard Cite

The hydrogen production from natural gas has advantages of low investment, low carbon emission, and high hydrogen production rate. This paper briefly describes the technical overview of hydrogen production from natural gas reforming and identifies its risk factors. According to the dangerous characteristics of high reaction temperature, easy leakage of reaction medium, flammability, and explosion in the process, the intrinsic safety of the process is discussed in combination with relevant research and industrial experience. The safety requirements of key equipment and materials are introduced in detail, followed by the optimization methods of process safety that can be taken in the engineering process. Besides, the accident prevention measures for emergency shutdown and fire explosion are summarized. Finally, the future research demands are put forward from the perspective of research and development, which is instructive for the safe hydrogen production from natural gas in the future.

show abstract

“…3. The reforming tube has the characteristics of both a reactor and a pressure vessel, and is a key component of the SMR reaction [56].…”

Section: Materials Requirements For Safety 41 Reforming Furnacementioning

confidence: 99%

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

Feng,

Gu,

Pang

et al. 2024

ChemBioEng Reviews

View full text Add to dashboard Cite

show abstract

“…As a result, the maximum clearance between pipes and tubes for the shell and tube reformer was designed to be about 3.5 mm so that the properties of the heat source could be identified evenly. Therefore, a 3.2 mm-diameter catalyst (Clariant's MDC-3 with CuO and ZnO series) was chosen to occupy the reformer shell side [21][22][23][24]. Figure 1b displays the configuration of the cylindrical shell-and-tube evaporator, which has four gates: a hot-gas inlet, hot-gas outlet, cold-mixture inlet, and cold-mixture outlet (reformer-in).…”

Section: Design Of the Methanol/steam Mixture Evaporator For Reforming Systemmentioning

confidence: 99%

Evaporation of Methanol Solution for a Methanol Steam Reforming System

Trinh

Kim

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

In a methanol-reforming system, because the mixture of methanol and water must be evaporated before reaching the reforming reaction zone, having an appropriate evaporator design is a fundamental requirement for completing the reforming reaction. This study investigates the effect of the evaporator design for the stable reforming of methanol–water mixtures. Four types of evaporator are compared at the same heat duty of the methanol-reforming system. The four evaporators are planar heat exchangers containing a microchannel structure, cylindrical shell-and-tube evaporators, zirconia balls for internal evaporation, and combinations of cylindrical shell-tubes and zirconia balls. The results show that the evaporator configuration is critical in performing stable reform reactions, especially for the flow-field mode of the evaporator. Additionally, the combination of both internal and external evaporation methods generates the highest performance for the methanol-reforming system, with the methanol conversion reaching almost 98%.

show abstract

“…In particular, the counter-flow arrangement of the catalyst layer relative to the hot gas (heat source) and the uniform flow of the hot gas can increase heat transfer, resulting in higher methane conversion [19]. The burner configuration and the number of reformer tubes also significantly influence thermal efficiency and methane conversion [20,21].…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Heat Transfer and Conversion Efficiency by Tube Design and Flow Configuration for a Compact Steam-Methane Reformer

Koo,

Kang,

et al. 2023

Energies

View full text Add to dashboard Cite

In the chemical industry, hydrogen (H2) production through steam-methane reforming is a well-established process. With the growing demand for H-fueled vehicles and charging stations, there is a need for compact reformers with efficient heat transfer capabilities. In this study, computational fluid dynamics simulations were performed to evaluate the methane (CH4) conversion and heat transfer efficiency of various reformer designs. These designs include single, double, and triple tubes, each with parallel- and counter-flow configurations between the reformate feed and heat source. The findings revealed substantial disparities in methane conversion between the tube designs and flow configurations. Notably, the triple-tube design outperforms single and double tubes, exhibiting higher methane conversion and improved heat transfer efficiency. This superior performance is attributed to the larger wall area facing the heat source and additional heat recovery from the reformate flowing in the inner annulus. This led to the highest temperature at the catalyst exit among the cases, increasing methane conversion, and the lowest reformate temperature at the reformer tube exit, which is also beneficial for the subsequent water–gas shift reaction process. Installing external fins on the reformer tube provided a more effective enhancement of heat transfer than using internal fins in the catalyst section. Regardless of the tube design employed, the counter-flow configuration consistently enhanced the heat transfer efficiency, resulting in 4.6–11.9% higher methane conversion than the parallel-flow configuration. Consequently, the triple-tube design with the counter-flow configuration achieved the highest methane conversion, offering flexibility in the reformer design, including the potential for lower heat input and a reduced catalyst volume.

show abstract

Interactive heat transfer characteristics of 5 kW class shell-and-tube methane steam reformer with intermediate temperature heat source

Cited by 14 publications

References 46 publications

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

Evaporation of Methanol Solution for a Methanol Steam Reforming System

Numerical Evaluation of Heat Transfer and Conversion Efficiency by Tube Design and Flow Configuration for a Compact Steam-Methane Reformer

Contact Info

Product

Resources

About