Processes
·
2024
·Vol. 12
·期 8
·1768
·
IF 2.8
Jinxu Zhang,Bo Ling,Yong He,Yanqun Zhu,Zhihua Wang
Hydrogen energy, as a clean, renewable, and high-calorific energy carrier, has garnered significant attention globally. Among various hydrogen production methods, the thermochemical iodine–sulfur (I-S) cycle is considered the most promising due to its high efficiency and adaptability for large-scale industrial applications. This study focuses on the distillation characteristics of the HIx(HI–I2–H2O) solution within the I-S cycle, which is crucial for achieving the high-concentration HI necessary for efficient hydrogen production. Previous methods, including phosphoric acid extraction–distillation and reactive distillation, have addressed azeotrope issues but introduced complexities and equipment demands. This research constructs a hypo-azeotropic HIxsolution distillation experimental system and uses the Aspen Plus v14 software to optimize distillation parameters. By analyzing the effects of feed stage, reflux ratio, and feed temperature, the study provides essential data for improving distillation efficiency and supports the scale-up of I-S cycle technology. The findings indicate that optimal distillation is achieved with a feed position at 1/3 column height, a reflux ratio of 1.4, and a feed temperature near the boiling point, enhancing the feasibility of industrial hydrogen production via the I-S cycle.
研究领域:
化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Haitao Xu,Ye Chen,Qing Wen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang,Xu Pan
Microbial fuel cells have been proposed as one of the sustainable and potential technologies for treating contaminants and synchronously producing green energy. However, the poor performance of the anode is a major obstacle in the practical application of MFCs. To address this challenge, the rational design of anode materials with enhanced biocatalytic and biocompatible properties has been considered as an effective approach to improve extracellular electron transfer (EET) processes and general MFC performance . Herein, in light of the interaction between the transition metal and exoelectrogens, nickel-cobalt sulfide/Ti 3 C 2 Mxene (NiCo 2 S 4 /Mxene) is prepared by electrostatic assembly, which combined positively charged sea-urchin-like NiCo 2 S 4 with negatively charged Mxene. This not only prevents the stacking of NiCo 2 S 4 and Mxene but also accelerates the EET process by harnessing their biocompatibility and biocatalyst. As expected, the MFC with NiCo 2 S 4 /Mxene harvested higher electricity energy (9.66 ± 0.28 W/m 3 ), significantly exceeded those of plain carbon felt (CF, 1.68 ± 0.13 W/m 3 ), Mxene (4.32 ± 0.20 W/m 3 ) and NiCo 2 S 4 (5.41 ± 0.22 W/m 3 ). Moreover, the microbial community analysis further revealed that the sulfide composite attracts a higher percentage of sulfur-cycling exoelectrogens (Desulfuromonas (24.25%) and Marinobacterium (15.75%)), motivating associated metabolic pathways with more efficient electricity generation processes. Such commendable performances are mainly attributed to the synergistic effect between NiCo 2 S 4 and Mxene, which confers the bioanode with good biocompatibility and biocatalyst for biofilm adhesion and colonization, as well as providing abundant transition metals and sulfide active sites for the EET process. Our finding provides a facile routine for developing sulfide with appropriate modification as anode material for favorable performance of MFC, providing insights for sustainable and cleaner energy production in the future.
研究领域:
环境科学
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生物技术
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能源科学
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产品关联
DOI
高影响因子
mBio
·
2024
·Vol. 15
·期 3
·
IF 5.1
Qun Cao,Xuanyu Liu,Qingda Wang,Zongzheng Liu,Yongzhen Xia,Luying Xun,Huaiwei Liu
Methanethiol (MT) is a sulfur-containing compound produced during dimethylsulfoniopropionate (DMSP) degradation by marine bacteria. The C–S bond of MT can be cleaved by methanethiol oxidases (MTOs) to release a sulfur atom. However, the cleaving process remains unclear, and the species of sulfur product is uncertain. It has long been assumed that MTOs produce hydrogen sulfide (H2S) from MT. Herein, we studied the MTOs in the Rhodobacteraceae family—whose members are important DMSP degraders ubiquitous in marine environments. We identified 57 MTOs from 1,904 Rhodobacteraceae genomes. These MTOs were grouped into two major clusters. Cluster 1 members share three conserved cysteine residues, while cluster 2 members contain one conserved cysteine residue. We examined the products of three representative MTOs both in vitro and in vivo. All of them produced sulfane sulfur other than H2S from MT. Their conserved cysteines are substrate-binding sites in which the MTO–S–S–CH3 complex is formed. This finding clarified the sulfur product of MTOs and enlightened the MTO-catalyzing process. Moreover, this study connected DMSP degradation with sulfane sulfur metabolism, filling a critical gap in the DMSP degradation pathway and representing new knowledge in the marine sulfur cycle field.
研究领域:
微生物学
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环境科学
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海洋生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Heyu Li,Zhe Sun,Yan Cao
Gypsum (GP) by-products are a group of widely sourced sulfur-containing solid wastes and their recycling utilizations are of great significance. This work proposed a new cyclic GP utilization process, achieving both the sulfur recovery and simultaneous value-added syngas byproduct under the restriction of the CO 2 capture. This innovative process integrates the carbon-fueled and calcium-based chemical-looping technology to generate concentrated SO 2 , followed by the recovery of the sulfur to be a concentrating sulfuric acid via the iodine–sulfur thermochemical cycle and finally the CO 2 capture to produce CaCO 3 /(NH 4 ) 2 SO 4 by the use of the in-situ generating calcium adsorbent via the NH 3 -Merseburg process. Its feasibility was thermodynamically and experimentally validated. It’s found that the elevated temperature and the weak reducing atmosphere were conducive to a nearly 100% thermally-decomposed of GP (mainly CaSO 4 ) toward a mixture of CaS and CaO (a ratio in 4:6) and the maximum per pass carbon conversion over 80% using carbon fuels (coal), and the carbon residues can be recovered back to carbon fuel stream. The recovery of I 2 can be achieved through the electrochemical electrolysis method and then recycled. The optimization of heat exchange network results in energy consumption reduction by 79.6% and 75.2% for hot and cold utilities, respectively.
研究领域:
环境科学
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化学工程
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jinhong Fan,Lin Gu,Deli Wu,Zhigang Liu
Among the numerous iron-based materials for persulfate (PS) activation, mackinawite (FeS) particles have gained considerable interest as a ubiquitous natural mineral due to their high reactivity. However, the iron and sulfur co-mediated reaction mechanism of PS activation by FeS remains ambiguous. In this study, FeS was applied as a catalyst to activate PS for p -chloroaniline (PCA) degradation and mineralization over a wide initial pH range (3.0–11.0). The reaction was found to follow pseudo-first-order kinetics, with rate constants ranging from 0.0044 to 0.0144 min −1 . The reaction mechanism was elucidated by electron spin resonance (ESR) and quenching studies. A heterogeneous activation mechanism, in which surface Fe(II) species activated PS to produce OH ads and SO 4 − ads , controlled by surface reaction and diffusion was proposed, whereas OH free and SO 4 − free diffusing from the FeS surface were mainly responsible for PCA degradation. The sulfur-mediated cycling of iron species was investigated by comparing PS activation by zero-valent iron (ZVI) and FeS, exogenous Fe(III) addition and X-ray photoelectron spectroscopy (XPS). The results suggested that Fe(II) and S(-II) experienced independent oxidations and that S(-II) species could regenerate Fe(II) from Fe(III) at the FeS surface. Therefore, the S(-II)-promoted Fe(II)/Fe(III) cycle resulted in less PS decomposition but a higher PCA mineralization efficiency. The findings of this study elucidated the novel surface activation mechanism of PS by FeS and provided useful information for utilizing FeS to remediate contaminated water.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
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2022
·
IF 3.101
Jiakang Li,Yu Zhang,Yongxin Lv,Xiang Xiao
Hadal trenches extend below 6000 m water depth. The high hydrostatic pressures occurring in the trenches (>60 MPa) create unfriendly for life conditions. Here, we isolated 55 fungal strains from hadal (>6000 m) and non-hadal (∼3500 m and 5500 m) sediments from the Mariana Trench using different pressure incubation experiments. The fungal strains that were successfully isolated, were assigned to Ascomycota (14 genera/25 species) and Basidiomycota taxa (5 genera/5 species). Among them, 41 fungal strains (38 isolates from Ascomycota and 3 isolates from Basidiomycota) were able to grow at hydrostatic pressures of 20 MPa, while 3 of these strains maintained successful growth at 60 MPa, which resembles the hydrostatic pressure at 6000 m water depth. Whole-genome sequencing and physiological activity data from two fungal isolates ( Penicillium bialowiezense A30 and Cladosporium colombiae 601) growing at 20 MPa highlight the metabolic potential of fungal piezotolerants from the Mariana Trench in carbon (e.g., carbohydrate metabolism), nitrogen (e.g., assimilatory nitrate reduction) and sulfur (e.g., assimilatory sulfate reduction) cycling. Overall, our study demonstrates the existence of piezotolerant fungi from the Mariana Trench that can grow successfully under hydrostatic pressures of 20–60 MPa and highlights their potential ecological and metabolic functions in deep sea and hadal trench ecosystems.
研究领域:
微生物学
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基因组学
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海洋生物学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2025
·
IF 4.3
Xin-Run Sun,Wan-Song Zong,Lingqiang Kong,Xiang Chen,Mei-Yan Liu,Su-Chun Wang,Peng-Fei Xia,Xian-Zheng Yuan,Li-Juan Feng
Bisphenol A (BPA) is a pervasive environmental contaminant known for its detrimental effects on human health. However, its impact on multiple generations of microorganisms and the biogeochemical cycles they mediate, particularly at environmentally relevant concentrations, remains poorly understood. This study explores the effects of BPA on Roseovarius nubinhibens, a crucial bacterium in the global sulfur cycle, under both short-term (F0 generation) exposure at the observed-effect concentration (26 mg/L) and long-term (F20 generation) exposure at an environmentally relevant concentration (0.06 mg/L). Short-term exposure to the observed-effect concentration significantly inhibited bacterial growth by 12.9%, while long-term exposure at the environmentally relevant concentration induced notable morphological changes without affecting growth. BPA at the observed-effect concentration also disrupted extracellular polymeric substance (EPS) production and protein structures, particularly in the soluble-EPS (S-EPS) fraction, leading to impaired bacterial flocculation. Additionally, BPA at both exposure levels decelerated the conversion of dimethylsulfoniopropionate (DMSP), with the observed-effect concentration particularly affecting the cleavage pathway, reducing dimethyl sulfide (DMS) production. This study provides the first direct experimental evidence that BPA disrupts the metabolic equilibrium of sulfur cycling. These findings underscore the need for deeper exploration of BPA’s environmental risks, especially at environmentally relevant concentrations, and its potential to interfere with microbial-driven sulfur biogeochemistry.
研究领域:
环境微生物学
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生物地球化学
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海洋微生物学
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毒理学
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微生物生态学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2020
·Vol. 117
·期 27
·15599-15608
·
IF 9.412
Jiayi Liu,Yifeng Wei,Lianyun Lin,Lin Teng,Jinyu Yin,Qiang Lu,Jiawei Chen,Yuchun Zheng,Yaxin Li,Runyao Xu,Weixiang Zhai,Yangping Liu,Yanhong Liu,Peng Cao,Ee Lui Ang,Huimin Zhao,Zhiguang Yuchi,Yan Zhang
2(S)-dihydroxypropanesulfonate (DHPS) is a microbial degradation product of 6-deoxy-6-sulfo-d-glucopyranose (sulfoquinovose), a component of plant sulfolipid with an estimated annual production of 1010 tons. DHPS is also at millimolar levels in highly abundant marine phytoplankton. Its degradation and sulfur recycling by microbes, thus, play important roles in the biogeochemical sulfur cycle. However, DHPS degradative pathways in the anaerobic biosphere are not well understood. Here, we report the discovery and characterization of two O2-sensitive glycyl radical enzymes that use distinct mechanisms for DHPS degradation. DHPS-sulfolyase (HpsG) in sulfate- and sulfite-reducing bacteria catalyzes C–S cleavage to release sulfite for use as a terminal electron acceptor in respiration, producing H2S. DHPS-dehydratase (HpfG), in fermenting bacteria, catalyzes C–O cleavage to generate 3-sulfopropionaldehyde, subsequently reduced by the NADH-dependent sulfopropionaldehyde reductase (HpfD). Both enzymes are present in bacteria from diverse environments including human gut, suggesting the contribution of enzymatic radical chemistry to sulfur flux in various anaerobic niches.
研究领域:
微生物学
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环境科学
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生物地球化学
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生物化学
✓ 已验证
DOI
PubMed
高影响因子
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